43 results about "Precipitation" patented technology

Positive electrode active materials are described that have a very high specific discharge capacity upon cycling at room temperature and at a moderate discharge rate. Some materials of interest have the formula Li_1+xNi_αMn_βCO_γO₂, where x ranges from about 0.05 to about 0.25, α ranges from about 0.1 to about 0.4, β ranges from about 0.4 to about 0.65, and γ ranges from about 0.05 to about 0.3. The materials can be coated with a metal fluoride to improve the performance of the materials especially upon cycling. Also, the coated materials can exhibit a very significant decrease in the irreversible capacity lose upon the first charge and discharge of the cell. Methods for producing these materials include, for example, a co-precipitation approach involving metal hydroxides and sol-gel approaches.

The invention discloses a rapid treatment method for a fracturing flowback fluid. The rapid treatment method comprises: (1) pumping a fracturing flowback fluid into an electron beam irradiation chamber, and staying for 20-120 s in the electron beam irradiation chamber; (2) adding a coagulant and a flocculant into the sewage treated by the electron beam irradiation chamber, and clarifying in a flocculation precipitation pool; (3) feeding the water treated by the flocculation precipitation a precision filtration pool, and carrying out fine filtration; and (4) collecting the water filtered by theprecision filtration pool in a clear water pool. According to the present invention, the gel breaking stage uses physical gel breaking so as to achieve clean gel breaking and greatly reduce the sideeffects of external agents, such that the reuse quality of the fracturing flowback fluid is good, and the fracturing flowback fluid is safe; the gel breaking time is shortened from 5-120 min to 20-120s so as to greatly improve the gel breaking speed; and compared with the traditional chemical gel breaking method and the biological gel breaking method, the method of the present invention simplifyfeeding equipment and other supporting equipment, reduces the occupation area, and reduces the complexity of manual operation.

Methods and apparatus are disclosed for recovering metals from metal-containing support materials such as mineral ores. In one embodiment, the metal may be separated from crushed support material or ore in a bioleaching lagoon by the action of hydrocarbon-utilizing bacteria under anaerobic conditions. The bioleached material is then pumped into a precipitation lagoon where hydrocarbon-utilizing bacteria oxidize the metals under aerobic conditions. In another embodiment, metals may be directly biooxidized from a heap of the metal-containing support material having a hydrocarbon/oxygen injection system embedded therein. A water sprinkler system may be used to wet the heap while the hydrocarbon/oxygen injection system stimulates the growth of hydrocarbon-utilizing bacteria. The resulting effluent solution may be pumped or gravity fed to an aerobic precipitation lagoon where aerobic hydrocarbon-utilizing bacteria are used to precipitate or otherwise deposit the metals onto a deposition material.

A method for treating a wastewater stream containing organic material or inorganic material comprising passing the wastewater stream to an anode or a cathode of a bioelectrochemical system to thereby alter the pH of the wastewater stream to: a) reduce the pH of the stream passed to the anode to minimise or suppress precipitation of dissolved cations; or b) increase the pH of the stream passed to the cathode to produce an alkaline stream; or c) reduce the pH of the stream passed to the anode to produce an acid containing stream. In one embodiment, a caustic soda solution is produced at the cathode and recovered for storage and subsequent use.

A method and system for controlling a silicon nitride etching bath provides the etching bath including phosphoric acid heated to an elevated temperature. The concentration of silicon in the phosphoric acid is controlled to maintain a desired level associated with a desired silicon nitride/silicon oxide etch selectivity. Silicon concentration is measured while the silicon remains in soluble form and prior to silica precipitation. Responsive to the measuring, fresh heated phosphoric acid is added to the etching bath when necessary to maintain the desired concentration and silicon nitride:silicon oxide etch selectivity and prevent silica precipitation. The addition of fresh heated phosphoric acid enables the etching bath to remain at a steady state temperature. Atomic absorption spectroscopy may be used to monitor the silicon concentration which may be obtained by diluting a sample of phosphoric acid with cold deionized water and measuring before silica precipitation occurs.

The invention discloses a method and a system for modularized combined treatment of high-difficulty organic waste water, and the treatment system comprises: a primary settling tank, an adjusting tank, a reinforced flocculation tank, a precipitation separation tank, a secondary flocculation settling tank, a buffering water tank, a pH adjusting tank, a primary honeycomb microelectrolytic tank, a flocculation settling tank, a secondary honeycomb microelectrolytic tank, an intermediate tank, a heat exchanger, a microwave catalytic oxidation device, a secondary catalytic oxidation pot, and a re-oxidation filter pipe. The treatment method adopts a combined technical scheme of a multistage honeycomb iron carbon microelectrolytic module, a reinforced flocculation module and a microwave electro-catalytic oxidation module; the invention has the characteristics of high applicability, good treatment effect, and unit modularization; the modules can be combined and cascaded freely according to the waste water condition, and thus different waste water treatment effect requirements and waste water quantity requirements are adapted; the operation cost is low; the sludge amount is low; no secondary pollution is caused; and the method is an environment-friendly high-difficulty waste water treatment method.

The invention discloses a device and method for monitoring and early warning of flood damages based on multi-resource integration. The device comprises a hydrological actual state module, a flow forecast module, a weather forecast module, a radar analysis module, a forecast integration module and a module for product display and early warning release. The method comprises the steps that (1) the hydrological actual state module reads and monitors monitoring point data; (2) the weather forecast module reads input data and parameters to carry out weather mode forecasting; (3) the flow forecast module carries out flow forecasting according to the weather mode forecast and the monitoring point data provided by the hydrological actual state module; (4) the radar analysis module reaches basic data of a radar and estimates precipitation and optical-flow extrapolation; (5) the forecast integration module integrates and outputs information of the flow forecast module and the radar analysis module; and (6) the module for the production display and the early warning release completes the product display and the early warning release. The device and the method consider accuracy of radar extrapolation forecasting in forecasting of the position of a precipitation system and also consider capacity of numerical mode forecasting, so that limitations of the single method are avoided.

The invention discloses a coating modification method for improving performance of a rich-lithium manganese-base positive electrode material. The rich-lithium manganese-base positive electrode material is arranged in the material, wherein the rich-lithium manganese-base material is Li[LixMn1-x-yMy]O2; praseodymium phosphate is arranged on a surface layer of the material; intermigration of a transition metal ion, a phosphate radical and a praseodymium ion exists in a coating process; and a new phase capable of conducting an ion and an electron is generated on an interface. The method comprises the following specific steps of ultrasonically dispersing the rich-lithium manganese-base material in secondary water or an organic solution to form a disperse and uniform suspension; dissolving praseodymate in the suspension; adding phosphoric acid or phosphate to allow a phosphate radical ion and the praseodymium ion to perform a precipitation reaction on the surface of the rich-lithium manganese-base material; generating an initial coating layer; obtaining slurry comprising the initial coating layer; and finally drying the obtained slurry and then calcinating the slurry to obtain the rich-lithium manganese-base anode composite powder material comprising a praseodymium phosphate coating layer. The rich-lithium manganese-base composite material comprising the praseodymium phosphate coating layer prepared by the method is low in cost, high in capacity, high in first efficiency, low in voltage drop, good in stability and good in rate performance.

The invention discloses a scale advanced treatment method for livestock and poultry farming waste water. The method of the invention comprises the following steps: (1) adding acid to the livestock and poultry farming waste water after biological treatment, and regulating the pH value of the waste water to be less than or equal to 5.0; (2) adding H2O2 and soluble ferrite to the waste water to carry out oxidation reaction, wherein the mol ratio of the H2O2 to the Fe<2+> in the soluble ferrite is between 1:1 to 2:1; and (3) after carrying out reaction for not less than 10 minutes, adding alkali to reaction liquid, regulating the pH of the reaction liquid to be greater than or equal to 6.0, carrying out flocculating and depositing, and then discharging deposit and waste water according with the discharge standard. By controlling the pH value of the reaction system, the adding proportion of the H2O2 to the FeSO4, and the running time, the invention achieves the treatment effect and optimization of energy consumption. The process effectively oxidizes and decomposes the trace organic pollutants (incretion interferents, antibiotics and the like), simultaneously removes various heavy metals and phosphorus by coagulating sedimentation, inactivates pathogenic bacteria in the waste water, and realizes integrated high-efficiency reinforcement treatment of the livestock and poultry farming waste water.

An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipitating particles comprising primarily silver sulfate, wherein the reaction and precipitation are performed in the presence of an aqueous soluble carboxylic acid additive or salt thereof, the amount of additive being a minor molar percentage, relative to the molar amount of silver sulfate precipitated, and effective to result in precipitation of particles comprising primarily silver sulfate having a mean grain-size of less than 70 micrometers.

The invention discloses a method for preparing angiotensin-I-converting enzyme (ACE) inhibitory peptide by using enzymolysis goat milk casein. The method comprises the following steps of: centrifugally degreasing recovered goat milk to obtain skimmed milk; preparing casein by using an isoelectric precipitation method; freezing and drying casein precipitate; dissolving the obtained casein freeze-dried powder to prepare a casein solution; performing hydrolysis on the casein solution by adding different kinds of enzymes; and optimizing the hydrolysis condition and treating a hydrolysis process in an ultrasonic wave mode, so that catalytic activity is improved to ensure that the hydrolysis reaction is complete; and because of the obtained micromolecule ACE inhibitory peptide, obvious pressure reduction function on hypertensive can be achieved, the influence on normal blood pressure is avoided, and the method has the characteristics of no toxic and side effects, high security and easiness for absorption.

The invention provides a method for recycling rhenium from copper smelting smoke washing waste acid. The method includes the steps that A, the copper smelting smoke washing waste acid is filtered, and clear waste acid and selenium mud are obtained; B, the clear waste acid is mixed with a first precipitation agent to react, and copper-removed later liquid and copper-deposited slag are obtained; and C, the copper-removed later liquid is mixed with a second precipitation agent to react, rhenium-deposited later liquid and rhenium-rich slag are obtained, and in the clear waste acid, the copper content ranges from 0.2 g/L to 3 g/L; or the method includes the steps that A, the copper smelting smoke washing waste acid is filtered, and clear waste acid and selenium mud are obtained; and D, the clear waste acid is mixed with a precipitation agent to react, rhenium-deposited later liquid and rhenium-rich slag are obtained, and in the clear waste acid, the copper content is larger than 0 g/L and smaller than 0.2 g/L. According to the method, the high-copper waste liquid is subjected to copper and rhenium deposition step by step, the low-copper waste liquid is subjected to rhenium deposition in one step, only one kind of auxiliary material sodium thiosulfate is needed in the whole process, the copper recycling rate ranges from 95.3% to 99.8%, and the rhenium recycling rate ranges from 99% to 99.53%.

The invention provides a method and a device for retrieving an atmospheric water vapor content. Through acquiring BDS observation data and downloading ephemeris data IGU from an IGMAS, ephemeris datafor retrieving are acquired based on the ephemeris data IGU; based on the above information, coordinate information of an observation station is acquired, total tropospheric zenith delay above the observation station is acquired, and based on the coordinate information of the observation station and a saastamoinen model, zenith dry delay is calculated and acquired, and the zenith dry delay is subtracted from the total tropospheric zenith delay to obtain zenith wet delay; and according to a conversion coefficient, a liquid water density and the zenith wet delay, atmospheric precipitation is calculated. On the premise that the ephemeris data meet the precision requirements of retrieving the atmospheric water vapor content by the BDS, real-time retrieving of the atmospheric water vapor content by BDS observation can be realized, the atmospheric water vapor content measurement precision is improved, and the method and the device are applicable to conditions with a large altitude differencebetween the observation station and a reference station.

The invention discloses a microbicide composition and an application thereof. The microbicide composition comprises an active ingredient and a chelating agent, wherein the active ingredient comprises Zhongshengmycin and chitooligosaccharides, and the weight ratio of the Zhongshengmycin to the chitooligosaccharides to the chelating agent is 1: (0.1 to 15): (5 to 30). The chelating agent comprises at least one of edetic acid, sodium metaphosphate, sodium tripolyphosphate, ammonium citrate, potassium sodium tartrate and aminotriacetic acid. When wettable powder, water-dispersible granules and soluble liquid agents prepared from the microbicide composition disclosed by the invention and microbicides of other compositions and dosage forms are used in a tumble-blend manner, flocculation, precipitation and the like are not caused, and the pesticide effect of tumble-blend use is remarkably improved.

The invention relates to a data mining-based sand dust storm data analysis method. A sand dust storm value is assessed by adopting a CART algorithm in a decision tree method, and the influence of factors such as a monthly average air pressure, a monthly average water vapor pressure, monthly minimum relative humidity, a monthly evaporation amount, a monthly precipitation amount and a monthly average wind speed on average sand dust storm is mainly considered. A decision tree model generated by monthly average sand dust storm division is built, a decision tree model generated by seasonal sand dust storm division is also built, and the two models are adopted for predicting the stand dust storm. Compared with other research achievements, the models built in the method have relatively high correct rate in sand dust storm prediction through analysis.

The invention relates to a method for recovering heavy metals in high-chlorine salt and high-acid wastewater, which belongs to the field of dangerous waste treatment and resource recycling. High-saltand high-acid wastewater undergoes hydrochloric acid resolution, adding medicine precipitation and calcium separation, neutralization and precipitation, acid-adding precipitation and zinc and lead separation, carbonate precipitation, residual heavy metal adsorption by exchange resin and evaporative crystallization, so that salt is obtained, and evaporative cooling water is used for washing metal precipitate sludge. After being treated by the method, wastewater is recycled, heavy metals are separated and recovered, crystallized chlorine salt can be adopted as a material for the chlor-alkali industry, bleaching in printing and dyeing and the like, and resource recycling of the heavy metal in the water is realized.

The invention provides a domestic sewage reuse apparatus. The apparatus comprises a shell, a water inlet and a water outlet, and also comprises a precipitation chamber, a disinfection chamber and a deodorizing chamber, the water inlet is positioned at the upper end of the precipitation chamber, a flocculant introducing device is arranged at one side of the water inlet, a first filter screen and a second filter screen are arranged in the precipitation chamber in parallel from top to bottom, a flow division member for dividing flow of sewage discharged into the water inlet is arranged between the water inlet and the first filter screen, an inclined plate for restricting the movement of sludge is arranged between the second filter screen and the bottom surface of the precipitation chamber, the precipitation chamber communicates with the disinfection chamber, ultraviolet lamp areas and water permeation areas are transversely alternately arranged in the disinfection chamber in parallel, the disinfection chamber is connected with the deodorizing chamber, and the connection is provided with a deodorizing agent introducing device.

The invention discloses a method capable of improving the explosive welding weldability of a large-thickness high-strength alloy. A substrate and a flying plate which can be subjected to heat treatment and enhanced obviously are subjected to explosive welding; the lower limit of an explosive welding window can be effectively reduced through a soft section, the problems that when the large-thickness high-strength alloy is directly used for explosive welding, the welding window is small, and the upper limit of explosive welding is reduced are solved, and weldability is enhanced; and by means of flying plate deformation in the explosive welding process, the heat treatment temperature can be reduced, the precipitation process can be effectively promoted, and the high performance can be easily obtained in the subsequent heat treatment process. In addition, if the soft flying plate is used, the torque needing to be overcome is small, in the explosive welding process, under the same requirement for the collision speed, the explosive load required by the soft flying plate is small obviously, and therefore the explosive usage quantity required in the explosive welding process is small, and greater environment protection is achieved. The performance of a composite obtained after explosive welding can be continuously adjusted within the required range according to the service conditions and the usage requirements.

The invention relates to the technical field of batteries, in particular to a lithium-rich anode material and a preparation method thereof. The preparation method comprises special steps: dissolvable Ni slat, Co salt, Mn salt and Li salt are firstly dissolved in an appropriate amount of organic alcohol solution according to a stoichiometric ratio, and a metal salt solution with a certain concentration is prepared; then, oxalic acid is dissolved in the organic alcohol solution, and an oxalate solution with a certain concentration is prepared; then, the metal salt solution and the oxalate solution are mixed to form a co-precipitation solution, the co-precipitation solution is aged, filtered and dried, so that a precipitate precursor is obtained; finally, the precursor is subjected to high temperature sintering, and the lithium-rich anode material xLi2MnO3.(1-x)LiMO2 (M is Co, Mn, Ni, Ni1/2Mn1/2, or Ni1/3Co1/3Mn1/3) is obtained. The preparation cost of the method is lower, and the shape and the size of the lithium-rich anode material are easier to control.

The invention relates to the technical field of sample filtration for instrumental analysis and provides a sample filter device for instrumental analysis. The sample filter device comprises a solutionfilter chamber which comprises an external cylindrical shell, a cylindrical filter barrel is embedded in the external cylindrical shell, and supporting columns are arranged on the inner bottom face of the external cylindrical shell. The upper end of the solution filter chamber is connected with a seal cover, a rotating rod is mounted in the middle of the lower side of the seal cover, stirring blades are mounted at the tail end of the rotating rod, and a rocker is arranged in the middle of the upper side of the seal cover. A pressurizing air cylinder is mounted at the upper end of a supportingplate which is mounted on the lower side wall of the solution filter chamber. By arrangement of the two-layer solution filter chamber, convenience in thorough filtration of liquid is achieved; by arrangement of the stirring blades and the rotating rod, impurity precipitation and attachment are avoided; by arrangement of the pressurizing air cylinder, the filter speed is increased. The sample filter device is simple in structure, capable of filtering instrumental analysis samples, high in filter speed and great in filter effect.

The invention discloses a traditional Chinese medicine oral liquid for improving the sub-health state and a preparation method of the traditional Chinese medicine oral liquid. The traditional Chinese medicine oral liquid for improving the sub-health state is prepared from the following effective components in pats by mass: day lily, lily, wheat, spina date seeds, albizia julibrissin, hawthorn, gardenia, liquorice and jujube. A medicinal material extract solution is prepared through material selection, material decoction, concentration, alcohol precipitation, filtration and ethanol recovery; and the medicinal material extract solution is prepared and enclosed to prepare the oral liquid. On the basis of the traditional Chinese medical theory, the edible and medicinal traditional Chinese medical formula with a treatment health effect is selected; the oral liquid has main functions of clearing away the heart-fire, tranquilizing the mind, and correcting yin and yang imbalance of a human body; the function of the human body can be improved; the sub-health state of the human body can be effectively improved; the traditional Chinese medicinal materials of various components are processed into the oral liquid according to the requirements of the production technology authenticated by food and medicine enterprises GMP; and the traditional Chinese medicine oral liquid is convenient to eat and carry.

The invention provides an ore impurity precipitation machine. The machine comprises a bottom support plate, a backflow plate and a positioning tank, wherein a servo motor is fixedly arranged in the center of the bottom of the bottom support plate, the periphery of the bottom of the servo motor is fixed at the bottom ends of inner sides of vertical rectangular support plates arranged at two ends ofthe top of the bottom support plate through a surrounding I-shaped fixing rack; a rotating shaft at the top of the servo motor is rotationally connected in a mixing homogenizer on the upper side, andsix support columns surrounding the servo motor are arranged between the mixing homogenizer and the bottom support plate. T-shaped pipes and electromagnetic control valves are arranged, the T-shapedpipes are arranged at the top of the mixing homogenizer, two symmetric electromagnetic control valves are arranged on the T-shaped pipes, so that two symmetric structures are arranged on two sides ofthe mixing homogenizer, the device on one side can be reserved for normal operation during replacement of a precipitation barrel, the continuity of the process can be guaranteed, and the production pause cost is reduced.

The invention provides a separation and recovery method for waste mineral oil. The separation and recovery method comprises the following steps: a, mixing the waste mineral oil with an extraction agent and an alkaline agent and carrying out solid-liquid separation to obtain filtrate; b, subsequently carrying out liquid-liquid separation and rectification on the filtrate obtained in the step a to obtain mineral oil. Compared with the prior art, the separation and recovery method provided by the invention has the advantages that by matching the extraction agent with the alkaline agent for use,charge interference of charged iron carbon chips can be eliminated, so that rapid precipitation of solid impurities is realized and further the mineral oil is separated and recovered. By using the separation and recovery method for the waste mineral oil, provided by the invention, a waste mineral oil water system which is not obvious in sediment and layering at high temperature for a long time canbe separated and recovered; in addition, the mineral oil obtained by separating and recovering has good quality and high yield. The experimental result shows that the separation and recovery method for the waste mineral oil, provided by the invention, can be used for recovering mineral oil of waste cutting fluid and waste steel sheet washing liquid in a steel plate factory; all properties of an oil product can meet national requirements and the yield can reach 40 percent.

A pump device includes a casing, an impeller, a base, and a motor. The casing includes a pump chamber, and an inlet and an outlet. The impeller is accommodated in the pump chamber. The motor is connected to the casing for driving the impeller to rotate and includes a rotor chamber for receiving a rotor. The base is disposed between the impeller and the motor and includes an accommodating groove having an inlet port in communication with the rotor chamber to allow fluid in the pump chamber to enter into the rotor chamber. In the pump device, precipitation has been performed to fluid in the accommodating groove before the fluid enters into the rotor chamber, thus the impurity particles can be prevented from entering into the rotor chamber, thereby prolonging the service life of the pump device.

The invention discloses a chip removal filter device for graphite production, which comprises an annular water pipe and a graphite production and processing box. A sedimentation box is arranged under the graphite production and processing box, and a collection box is arranged on one side of the sedimentation box. A water storage tank is provided on the other side of the tank, and a stainless steel sludge pump is provided between the collection tank and the sedimentation tank. The head realizes the full coverage of the spray water in the graphite production and processing box, and effectively collects the dust and chips generated during graphite processing. The box is connected with the water delivery pipe at the outlet of the spray water lifting pump through the recoil pipe and the tee pipe, and the stainless steel filter screen inside the filter box is cleaned by the backflow water to ensure the filtration efficiency of the stainless steel filter screen.

The invention belongs to the natural drug chemical field, and is characterized in that: grinding Xizang rhizoma picrorhizae medicinal materials, adding 75%-95% of ethanol with an amount of 16-20 times for refluxing and extracting for 2-3 times, recycling ethanol from an extracting liquid with lowered pressure, extracting a concentrated liquid with ethyl acetate, taking an organic layer, and recycling ethyl acetate for concentration. The volume is concentrated until sticky dipped using a glass rod, then it is placed at the condition of -10 DEG C to -5 DEG C for 24 hours, crystal is precipitated, and filtered, the crystal solid is refluxed and dissolved by adding 95% of ethanol, then standing for crystal precipitation, and then filtering to obtain the cucurbitacine B. According to the method provided by the invention, the process prepareing the cucurbitacine B is simple in process, low in cost, high in yield and productive rate, and suitable for industrial large-scale preparation.