25 results about "Filter cake" patented technology

A method of preventing fluid loss to a wellbore that includes pumping a wellbore fluid into the wellbore through a subterranean formation, the wellbore fluid comprising: a base fluid; and a plurality of particulate bridging agents comprising a solid breaking agent encapsulated by one of an inorganic solid material and an oil-soluble resin; and allowing some filtration of the wellbore fluid into the subterranean formation to produce a filter cake comprising the particulate bridging agents is disclosed.

The invention relates to a technology for extracting zinc, lead and silver step by step by processing zinc-leached residues by a full wet process, and belongs to the technical field of zinc-leached residue recycle. The technology comprises the following steps of: preparing sulfuric acid into an appropriate concentration, and performing two-stage acid leaching in an appropriate liquid-solid ratio and at a high temperature to obtain slurry; filtering and separating the slurry to obtain lead-silver residues and a zinc-containing solution; oxidizing, neutralizing and deironing the zinc-containing solution, and depositing zinc by using sodium sulphide; and eluting the lead-silver residues, blending with caustic lye at an appropriate concentration to obtain slurry at a certain concentration, reacting at a certain temperature and in a certain solid-liquid ratio, and filtering and separating to obtain a filter cake and a filtrate, wherein the filtrate is directly added with sodium sulphide for lead deposition and the filter cake returns to a silver cyaniding leaching process. The technology is short in process, simple in operation, low in cost and mild and loose in reaction conditions; an acid solution and an alkali solution at high concentrations are not required; requirements on equipment are low; the extraction rate of metal is higher than that in the conventional method; no additional waste solid, waste liquid and waste gas are discharged; the recycle of the eluate and the filtrate is realized; and environment pollution is avoided from the source.

The invention discloses a phosphor-silicon-containing aggregated flame retardant and a preparation method thereof. The preparation method comprises the following steps: adding 10-(2,5-dihydroxy phenyl)-9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and an acid-binding agent into a reactor loaded with a burette, a condensing tube and a nitrogen protection device, heating to 40 to 100 DEG C; weighing R1, R2-dichlorosilane, adding a solvent, and adding the mixture into the burette; adding the mixture at the temperature of 40 to 100 DEG C dropwise, and performing a thermal reaction for 2 to 10 hours after finishing of dropping; adding a precipitant, performing suction filtration, washing filter cakes with the precipitant, and drying to obtain the phosphor-silicon-containing aggregated flame retardant. The phosphor-silicon-containing aggregated flame retardant has high phosphor content and silicon content, abundant carbon sources, high char forming characteristic, superior flame retardance and thermal stability, and can be applied to high-molecular materials such as flame-retardant polypropylene, polystyrene and epoxy resin.

The invention relates to the field of lithium carbonate preparation, in particular to a method for extracting lithium from brine to prepare battery-grade lithium carbonate by an ion exchange method. The method includes the steps of 1), removing magnesium by a coprecipitation method; 2), adsorbing to extract the lithium by a manganese adsorbent; 3), preparing the battery-grade lithium carbonate, namely adding alkaline liquor into a desorption solution in the step 2), regulating a pH value to 7-12, producing manganese hydroxide precipitate, filtering the manganese hydroxide precipitate, concentrating filtrate until the lithium content reaches 20-30 g/L, filtering to remove sodium chloride, adding a saturated sodium carbonate solution to react, filtering, and subjecting filter cakes to water scrubbing so as to obtain the battery-grade lithium carbonate. The method has the advantages that hydrotalcite is obtained after magnesium removal, so that the problem of recycling the magnesium in the brine is solved; the content of various impurity ions in the desorption solution can be controlled effectively by removing the magnesium and extracting the lithium by adsorption sequentially, and then the battery-grade lithium carbonate is prepared.

The invention discloses Mn<4+> doped fluoroaluminate red fluorescent powder as well as a preparation method and an application thereof. The method comprises steps as follows: hydrofluoric acid and water are added to a polytetrafluoroethylene container, K2MnF6 is added and stirred to be dissolved, and then KF is added; after KF is dissolved, K3AlF6 is added and continuously stirred to be completely dissolved, and then the mixture is continuously stirred for 30 min; the mixture is left to stand after stirring is stopped, suction filtration is performed, a filter cake is dried under the vacuum condition at the temperature of 70 DEG C, and the Mn<4+> doped fluoroaluminate red fluorescent powder is obtained. Compared with the prior art, the K3AlF6:Mn<4+> red fluorescent powder is synthesized in a hydrofluoric acid aqueous solution, and the diluted aqueous solution has a function of purifying the K3AlF6 phase; excessive KF.2H2O is added, so that the K3AlF6 phase is crystallized and separated to be purified in the aqueous solution; the obtained fluorescent powder has a narrow emission spectrum range, and the reabsorption phenomenon is effectively avoided; the phase of the synthesized fluorescent powder is pure, and the light emitting efficiency and collection rate are high; the color gamut range of a white light LED device packaged by the fluorescent powder is wide.

The invention relates to a novel extraction method of a plant crude drug, namely a method for extracting fucoidan polysaccharide sulfate. The name of the preparation commodity is a haikun shenxi capsule. The method comprises the following main extracting steps: (1) adding 10-fold water to a dried kelp to soak for 8 hours, controlling room temperature at 8-32 DEG C, taking a soak solution to be concentrated into 1/5 of original volume for later use, and separating out alginate on the surface of a marine organism by adopting the step; (2) taking out and cutting up the soaked kelp, and homogenating by using an AH high-pressure homogenizer; (3) adding sodium hydroxide to homogenated liquid to adjust the pH value to 12, stirring for 30 minutes, standing for 12 hours, adjusting the pH value to 1.5-2 by using a hydrochloric acid, stirring for 8 hours, and standing for 12 hours; (4) filtering; (5) merging filtrate with a concentrated solution in the step (1) and desalting by adopting specific 500 electroosmosis; (6) concentrating and decoloring soup; (7) centrifuging, and washing a filter cake by using 95% ethanol; (8) drying and crushing a dry substance. The yield is improved, and the cost is reduced. Compared with the prior art, the yield of the method is improved by over 40% by detection.

The invention relates to a surface treatment method of boron carbide powder. The surface treatment method comprises the following steps of: an acid treatment process of sufficiently mixing the boron carbide powder, water and acid, wherein the using amount of the acid is configured to enable a pH value of a mixture to be within 0.5-3; a process of aging the mixture at a ruled temperature within aging ruled time; and a process of filtering and washing obtained filter cake or powder with water until a pH (Potential of Hydrogen) value of a filtrate is 3-6.

The invention discloses a drilling water based plugging agent and a using method thereof. The plugging agent is prepared by using curing materials, filling materials, bridging materials and suspensionmaterials in ratio of (17 to 25) to ( 7 to 15) to ( 17 to 27) to (30 to 37), filtration time is less than 15s, a filter cake can be formed instantaneously, the loss of plugging materials and drillingfluid can be reduced, the plugging agent is an efficient plugging agent with high water loss, high strength and high acid solubility in one, and can be applied to any form of leakage, especially forpressure plugging and big leak in small cracks with best using effects after matching with clear water, mud systems, cement and the like according to proportion.

The invention relates to a progressive filter cake and water film two-level filter air purifying and humidifying device, and belongs to the technical field of air purifying and humidifying. The devicemainly comprises an upper grid plate, an LCD liquid crystal display, a temperature and humidity sensor, a side grid plate, a box body, a fan, a roll type filter, a liquid accumulation groove, a conical plastic net, a fiber thin film, a water pipe, a water tank, a water storage groove, a water pump, a piston and the like; according to first-level filter, through the roll type filter, a filter cakeis formed, through progressive replacement, filtered air is more stable in quality, according to second-level filter, a water film is formed on the filer film on the conical filer net, purifying of bacteria, dust and the like can be achieved while humidifying is carried out, according to the air purifying and humidifying device, the humidifying purifying manner and the purification manner can beswitched, the different needs of the user can be met, the progressive filter cake and water film two-level filter air purifying and humidifying device is high in efficiency, low in energy consumption,simple, and stable in filter effect, the indoor air can be effectively purified, and the device has the wide application prospect in the site with the particle requirement for the air quality.

The invention discloses a washing method for a reverse osmosis membrane component and a washing system. The washing method for the reverse osmosis membrane component comprises the following steps: a pre-washing step: pre-washing the reverse osmosis membrane component by using washing fluid; and a micro-bubble washing step: continuously feeding the washing fluid to the reverse osmosis membrane component, and feeding micro-bubbles to the reverse osmosis membrane component, thereby enabling a filter cake layer on the surface of the reverse osmosis membrane component to depart from the reverse osmosis membrane component. The method is high in washing efficiency, and long in washing period. A re-pollution speed of the reverse osmosis membrane component is apparently slowed down, and a rejectionrate of salt and a permeant flux are apparently improved.

The invention discloses a pipeline transportation means for alumyte. First, placing a raw material crusher on the alumyte mine, alumyte, lime and water are feed in the raw material crusher proportional. The water cut of the aqueous size after grinding is 45-55%; Secondary, sending the aqueous size to the aluminum ore size box in the alumina manufacturer using the pump amd the pipe; and then press with a pressing filter. The water-content coefficient of the filter cake after press is lower than 20%, And then send the filter cake to the aluminum ore bunker stored and dry the water-content coefficient of the filter cake to lower than 10%. The invention can reduce program investments substantial, cost down transport cost and improve the work environment of the alumina manufacturer.

The invention discloses a preparation method of ferric vanadate photocatalysts. According to the method, firstly, a direct current electrolysis method is used; by controlling the current density, the electrolyte concentration and the temperature, ferric vanadate with different appearance structures and particle diameters is prepared; then, products obtained at an anode are cleaned and filtered; obtained filter cake is dried for 4 to 6h at the temperature of 80 DEG C to 100 DEG C; natural cooling is performed to room temperature; finally, at the air atmosphere, the temperature is raised to 500 to 700 DEG C at the temperature rise speed of 2.5 to 10 DEG C/min; high-temperature roasting is performed for 3 to 5 h; the ferric vanadate with high purity and high cleanness degree can be obtained; the composition is FeVO4. The product obtained by controlling the corresponding conditions has the main appearance of ball-shaped particles and micro nanometer lines.

The invention discloses bamboo plywood and a preparing method thereof, and belongs to the field of building materials. The method comprises the steps that according to weight parts, raw materials are obtained, the phenolic resin 2124, polyvinyl alcohol, nonylphenol polyoxyethylene ether and a diluent are stirred and mixed, a phenolic resin adhesive is obtained, then a filter cake is placed in the phenolic resin adhesive for gum dipping and dried, gum-dipped bamboo skin is obtained, the gum-dipped bamboo skin is placed in a hot press machine which uses steam as a hot source, a blank is obtained by pressing, the blank is cooled, and the bamboo plywood is obtained. The bamboo plywood and the preparing method thereof have the beneficial effects that the bamboo plywood has good glue strength, after being used, the bamboo plywood is not prone to warping, deforming or degumming, and the bamboo plywood is worthy of being used and promoted.

The invention discloses an improved coconut shell and a method thereby for reducing vanadium in a water body, and belongs to the field of metallurgy. The invention aims to solve the technical problemthat the improved coconut shell and the method thereof for reducing the vanadium in the water body are provided. The modified coconut shell is prepared in the following steps: the coconut shell is washed, dried and smashed to obtain a powdery material; the powdery material is mixed with a citric acid solution and absolute ethyl alcohol and is subjected to oscillation and suction filtration to obtain a filter cake; the filter cake is washed and dried to obtain the modified coconut shell. The method for reducing the vanadium in the water body by the above coconut shell comprises the following steps: mixing the modified coconut shell and vanadium containing wastewater; carrying out oscillation and suction filtration to obtain purified solution. According to the method, the improved coconut shell is used for reducing the vanadium in the water body, wastes are reused, the vanadium in wastewater can be effectively recovered and utilized, the influence of the vanadium on environment is lightened, and the method has an obvious social benefit.

The invention provides a preparation method of zeolite-activated carbon composite adsorbent, comprising the following steps: (1) mixing coal gangue powder, asphalt, and white carbon black, drying, and then, in a tube furnace, under the protection of inert gas, Carbonization, and then carbon dioxide gas is introduced to activate to obtain the activated sample; (2) Add the activated sample to the sodium hydroxide solution, react, stand at room temperature for hydrothermal crystallization, then ultrasonically disperse, filter, and filter the residue Washing and drying to obtain the zeolite-activated carbon composite material; (3) Add the obtained zeolite-activated carbon composite material to the glucose solution, stir, filter, dry the obtained filter residue, and then put it into a tube furnace under the protection of an inert gas , carbonized to obtain the zeolite-activated carbon composite adsorbent. The zeolite-activated carbon composite adsorbent prepared by the invention has large BET specific surface area and micropore specific surface area, and has large adsorption capacity for CH4 and N2.

The invention provides a method for improving the viscosity of potato starch. The preparation method comprises the following steps: A, mixing rice starch and potato starch, adding a certain amount ofwater, and uniformly stirring to obtain a system suspension; B, performing suction filtration on the system suspension under reduced pressure to obtain a filter cake; and C, washing the filter cake, drying, grinding and sieving to obtain high-viscosity potato starch. According to the method, small-particle starch is added, so that the gelatinization characteristic of the potato starch is effectively improved, and the viscosity of the potato starch in the gelatinization process is remarkably improved. The product can be used for processing and manufacturing potato powder, the boiling fastness and toughness of the potato powder are improved, the cooking loss of the potato powder is reduced, and the product quality is remarkably improved.

A preparation method of a biomass derived carbon material comprises the steps: mixing soybean protein isolate powder with alkali and water at room temperature, heating the obtained mixture to 65-95 DEG C, stirring to form a colloidal semi-hydrolysis product, and drying to obtain dry hydrolysis powder; stirring and mixing wood powder with the obtained dry hydrolysis powder and zinc nitrate hexahydrate, heating the obtained mixed powder to 800-1000 DEG C under the protection of inert gas, carrying out heat treatment for 2-5 h, and then cooling to room temperature to obtain a black product; and mixing the obtained black product with hydrochloric acid, stirring, standing, filtering, washing a filter cake to be neutral, and drying to obtain the finished biomass derived carbon material. According to the method, the steps of carbonization, activation, element doping and the like can be simultaneously realized through a one-step high-temperature process, and the method has the characteristicsof simple preparation process and equipment and excellent finished product performance.

The invention belongs to the field of lithium battery recycling and particularly relates to a method for recovering cobalt and nickel from a waste lithium battery. The method comprises the following steps of (1) crushing a positive plate of the lithium battery into powder particles; (2) adding the crushed particles to excessive first strong alkaline solution, stirring until no bubble is generatedand filtering; (3) adding sulfuric acid and hydrogen peroxide to a filter cake and filtering after reaction is ended; (4) heating filtrate in a nitrogen environment, adding the first strong alkaline solution and carrying out suction filtration after the reaction is ended; and (5) washing and drying the filter cake and then detecting the filter cake. Compared with an extraction-reverse extraction process, the method provided by the invention is simple in technological process, relatively low in equipment requirements and high in operability; and after obtained composite hydroxide is washed, thecontent of nickel and cobalt is greater than 50% and the content of manganese is smaller than 2%, so that separation of precious metals, namely the nickel and the cobalt from a low-valence metal manganese is achieved.

A method for purifying potassium nitrate comprises the following steps: S1, washing raw materials sufficiently, separating solid and liquid to obtain filter cake and filtrate; S2, dissolving that filter cake to form a saturated solution, adding KOH solution into the saturated solution for sufficient reaction, filtering out the precipitate after the reaction, recrystallizing the solution, and finally washing and drying the crystals. The potassium nitrate purifying method of the invention has the advantages of simple production process, the purity of the potassium nitrate product obtained by theproduction reaches over 99.99%, meets the high-purity grade potassium nitrate standard (industrial potassium nitrate GB1918-2011), and meets the requirements of potassium nitrate products for opticalglass. In particular, the method for purifying potassium nitrate of the present invention can adopt agricultural grade potassium nitrate, industrial grade potassium nitrate and reinforced optical glass salt bath inactivated potassium nitrate as raw materials, thereby reducing the production cost.

The invention discloses a method for preparing barium sulfate and co-produced sodium carbonate. The method is that industrial products containing barium carbonate and industrial products containing sodium sulfate react chemically with each other according to the mass ratio of 1:0.42-0.70 of pure barium carbonate to pure sodium sulfate to obtain mixture of barium sulfate sediment and sodium carbonate solution; the mixture is filtered to obtain a filter cake and filter solution; the filter cake is washed, dried, crushed and packaged to obtain barium sulfate products; and the filter solution is distilled under reduced pressure to obtain sodium carbonate products. The invention has the advantages that the process of the method for preparing barium sulfate is simple, rapid and clear, the industrial barium carbonate and sodium sulfate can be used for producing high-purity barium sulfate, the production technology and the device are simple, the yield is extremely high and the benefit is very high.

The invention provides a cotton-fiber anionic modifier, a preparation method thereof and a dyeing process, and belongs to the field of cotton cloth modification dyeing, solving existing problems suchas large pollution caused by using cotton-fiber cationic modifiers to modify cotton cloth. The preparation method of the cotton-fiber anionic modifier is characterized by including the following steps: adding water, crushed ice and melamine into a first beaker, and stirring for 1-2 hours; adding water and p-aminobenzene sulfonic acid into a second beaker, and regulating the pH value by hydrochloric acid to 5-6 to make a solution transparent; adding the p-aminobenzene sulfonic acid hydrochloride in the second beaker into the first beaker, completing dropwise adding within 1-2 hours, keeping thetemperature below 5 DEG C, and carrying out a condensation reaction until the reaction ends; regulating the system pH value by sodium bicarbonate to 7-8; adding 25-40% of neutral salt according to volume to salt out; stirring for 1-2 hours, performing filter pressing, and drying a filter cake. The cotton-fiber anionic modifier has the advantages of small pollution and the like.

The invention relates to a method for preparing a soil remediation fertilizer based on lumbrukinase-attapulgite. The method comprises the following steps: weighing attapulgite raw ore, drying and grinding into powder of 120-200 meshes, and adding into distilled water for soaking; weighing a sodium hexametaphosphate dispersing agent to be added into an aqueous solution of the attapulgite powder, wherein the mass of the sodium hexametaphosphate is 1-4% of the mass of the attapulgite; stirring and filtering to obtain a wet filter cake; adding the wet filter cake into a lumbrukinase extracting solution, stirring the mixed solution, and performing vacuum freeze drying; and finally, grinding and granulating, thereby obtaining the lumbrukinase-attapulgite soil remediation fertilizer. According tothe combination of the attapulgite and lumbrukinase, the utilization efficiency of the lumbrukinase soil remediation fertilizer can be greatly improved, inorganic or organic pollution of the soil isremediated, damage of the chemical fertilizer to the soil is alleviated, the soil environment for crop growth is improved, fertilizer and water retaining can be realized, beneficial trace elements areprovided for growth and development of crops, and the fertilizer is a green, safe and environmental-friendly soil remediation fertilizer.

The invention provides a novel process method for extracting hesperidin by utilizing countercurrent. The process method comprises the following steps: crushing an immature bitter orange raw material by a crusher, and performing first-stage extracting by using a sodium citrate solution; transmitting the obtained substance to perform second-stage countercurrent extraction by using an alkaline extracting solution; transmitting the obtained substance to perform third-stage countercurrent extraction by using an alkaline extracting solution; drying the materials subjected to three-stage treatment and finishing slag discharging; combining the second-stage extracting solution and the third-stage extracting solution, then performing filtering to remove impurities, and performing fine filtering by using a box-type plate frame; slowly adding an acid into the filtrate while stirring to adjust the pH value, and performing crystallization for 8-12 hours; enabling the crystalline liquid to pass through a plate frame, flushing the filter cake with purified water to be colorless, and drying the filter cake by blowing; transferring the filter cake into a drying oven to perform drying. The core of the method is that a countercurrent extraction device is used for extracting hesperidin, and the advantage of countercurrent extraction is that automatic control can be realized in an extraction section, so that labor intensity of workers can be reduced, and batch difference, caused by human factors, of products can be avoided. The hesperidin produced by the method has stable quality and high purity.