59 results about "Ammonia" patented technology

The invention discloses an alumina coating method of a lithium ion battery positive electrode material. The method comprises the following steps: adding ammonia water to a positive electrode material suspended aluminum nitrate solution in a dropwise manner to form a precipitate coated by Al(OH)3, and heating the precipitate in an air atmosphere muffle furnace to form an alumina coated positive electrode material. The coating method can improve the charge and discharge capacity of the lithium ion battery and prolong the cycle life.

The invention discloses a phenol ortho-methylation catalyst and a preparation method thereof. The catalyst is an alkaline Fe/Mg compound oxide, wherein, the mol ratio of Fe to Mg is 1: (0.1-2). The preparation method comprises the following steps: mixing and dissolving soluble malysite and soluble magnesium salts into alcohols solvent according to a required proportion to prepare a solution A; adding polyethyleneglycol (PEG) into strong aqua ammonia to prepare a solution B; slowly mixing the solution A and the solution B in a cocurrent flow mode under the condition of normal temperature and ultrasound, and then going on with the ultrasound for 30 minutes; filtering, washing, drying and baking the obtained precipitation; porphyrizing the baked solid and repulverizing the solid into 10-20 mesh finely ground particles after tabletting; the finely ground particles are the catalyst. The catalyst has the advantages of high activity at low temperature, simple preparation, innocuity, good stability, high selectivity of ortho position, particularly high selectivity of orthocresol and few by-products.

The invention relates to a method for purifying citrulline from a watermelon, which comprises the following steps: removing the pulp of a citrulline, carrying out ultrasonic extraction twice to three times with acid water, settling impurities with a settling agent, purifying citrulline with macroporous resin columns and strong-acid cation resin columns in series, eluting with ammonia water, carrying out concentrative crystallization, dissolving roughly crystallized substances with acid water, adjusting the pH with ammonia water, recrystallizing and the like. The method has the advantages of high extraction efficiency, low energy consumption and high product purity.

Treated water with good water quality which can be discharged or reused is obtained by efficiently removing SS, fluorine, cyanogen, selenium, ammonia, and COD components contained in coal gasification wastewater such as gas washing wastewater generated in a coal gasification step. A method of treating coal gasification wastewater comprising steps (1) to (4), wherein the step (1) is performed prior to the step (2): (1) a fluorine removal step in which fluorine is removed by coagulation sedimentation; (2) a cyanogen decomposition step in which cyanogen is decomposed by wet oxidation or thermal hydrolysis; (3) a selenium treatment step in which selenate ions are subjected to a reduction treatment with a metal reductant; and (4) a COD/ammonia removal step in which COD and/or ammonia are/is removed.

The invention relates to an ultra-supercritical thermal generator set coordinated control system, and belongs to the technical field of generator set coordinated control. An intermediate point temperature control system, a main steam temperature control system, a reheated steam temperature control system, an AGC control system and an ammonia spraying control system are all connected with a DCS module through a corresponding optimized system model controller. A separator outlet mean temperature value module, a separator outlet temperature setting module, a unit load module, and a separator temperature-to-coal-water ratio value correcting module are all connected with the DCS module through the optimized system model controller. The ultra-supercritical thermal generator set coordinated control system is simple in structure, reasonable in design and convenient to use, the purpose of coordinating unit loads is achieved by controlling output force of a boiler and a steam turbine, and the purposes of improving the unit load response speed and precision are achieved through a series of advanced algorithms.

The invention discloses a carbonization cleaning process of a carbonizer for producing heavy soda ash, particularly aiming at a carbonization cleaning process of an outside cool tower for producing heavy soda ash, characterized by: using marshalling operation, using one tower for cleaning, using the other three towers for producing soda, and washing the towers with an ammonia mother liquor II by turns; sending the ammonia mother liquor II in a cleaning tower, letting a mixed gas of carbon dioxide and nitrogen in the cleaning tower, dissolving sodium bicarbonate and ammonium bicarbonate and other scabs in the tower with the ammonia mother liquor II, and simultaneously reacting ammonia in the ammonia mother liquor II with carbon dioxide to achieve the purposes of carbon dioxide absorption and then precarbonization. According to the invention, because of no need of letting the hot ammonia mother liquor II be subject to cooling and then enter in the soda production tower, the carbonization conversion degree is effectively raised, and the carbonization cleaning process disclosed herein is beneficial for cleaning the carbonizer.

The invention discloses a coproduction method of 1, 2-propanediamine and dimethyl piperazine, which comprises the following steps of: mixing ammonia and isopropanol amine, pre-heating for vaporization, filling steam into a fixed-bed reactor, performing reaction in the presence of a catalyst for condensation and amination and under conditions with the pressure of 1.0MPa to 4.0MPa, the temperature of 300 DEG C to 350 DEG C and the contact time of 1.0-3.0s to obtain product stream of 1, 2-propanediamine, 2, 5-dimethyl piperazine, 2, 6-dimethyl piperazine, unreacted ammonia and unreacted isopropanol amine, and distilling the product stream for separation to obtain the 1, 2-propanediamine, 2, 5-dimethyl piperazine and 2, 6-dimethyl piperazine; wherein the weight ratio of the ammonia and the isopropanol amin is (10-16):1, and the catalyst for condensation and amination comprises the following ingredients by weight percentage: 97-99 percent of HZSM-5 (H-type zeolite sieve of molecular porosity 5) zeolite and 1-3 percent of phosphorus. The coproduction method is mainly applied in preparation of the 1, 2-propanediamine and the dimethyl piperazine.

The invention relates to a method for removing bromate in water through oxidation reduction and a system thereof. The method comprises the following steps: firstly, controlling the dissolved oxygen concentration in the water at a lower level through the nitrification of ammonia salt and microbes on the active carbon; secondly, removing the bromate in the water through the reducibility of ferrous sulfate; and finally, removing excessive ferric ions in the water through a filtering unit. The system comprises a pretreatment working section for controlling the dissolved oxygen in the water, an oxidation reduction working section for removing the bromate and a filtering treatment working section for removing the excessive ferric ions, wherein the pretreatment working section is connected with the oxidation reduction working section, and the oxidation reduction working section is connected with the filtering treatment working section. The method can effectively remove the bromate in the water with a bromate removal rate of above 60 percent. The system has convenient operation and low running cost, can also be integrated with other technologies, and have very high practicability.

The invention relates to an electrolyte used for magnesium alloy anode oxidation treatment and a treatment method. The electrolyte comprises the following components of 20-60ml/L of polyaspartic acid salt, 40-100g/L of alkali metal silicate, 10-40g/L of boric acid or sodium tetraborate, 150-300ml/L of ammonia water or 50-200ml/L of organic amine and 20-60mg/L of sodium gluconate serving as additive, wherein the pH (potential of hydrogen) value of the electrolyte is 11-13. When the electrolyte disclosed by the invention is adopted for anode oxidation surface treatment on the magnesium alloy, one layer of smooth, even and compact ceramic layer with good corrosion resistance is formed on the surface of the magnesium alloy, the electrolyte can not pollute the environment and has a good favorable application prospect.

The invention discloses a method for preparing industrial molybdenum trioxide by roasting ammonia leaching residue, which comprises the following steps: evenly mixing ammonia leaching residue and molybdenum concentrate in a mass ratio of 1:(4-6), putting the mixture in a rotary kiln, and roasting at 450-680 DEG C for 5-8 hours to obtain the industrial molybdenum trioxide. The preparation method disclosed by the invention is simple, shortens the metallic molybdenum technological process in recycling ammonia leaching residue, lowers the requirement for equipment material and the cost for recycling molybdenum, and increases the metal recovery rate of the ammonia leaching residue. The industrial molybdenum trioxide prepared by the method disclosed by the invention satisfies the requirements for producing ammonium molybdate, ferromolybdenum and other products.

The invention provides a preparation method of a radial structure spherical NCM811 type ternary positive electrode material. The preparation method comprises the following steps: preparing a nickel salt, cobalt salt and manganese salt solution used as a solution 1, wherein a molar ratio of Ni:Co:Mn is 8:1:1; taking a precipitant, and preparing a solution 2; taking a complexing agent, and preparinga solution 3; adding the complexing agent solution into a reaction kettle as a base solution; adding the solution 1, the solution 2, and the solution 3 into the reaction kettle, introducing an inertgas to carry out protection, controlling the total ammonia concentration of the reaction system to be 0.5-1.5 mol/L, and performing aging under a pH value of 11.3-11.7 at a temperature of 45-55 DEG Cfor 5-15 h; washing the obtained reaction product, performing suction filtration, and drying the reaction product to prepare a precursor; grinding and uniformly mixing the precursor and a lithium saltwhich are used as raw materials; placing and sintering the obtained mixture in a muffle furnace in an oxygen atmosphere, wherein the sintering process comprises sintering at 400-500 DEG C for 4-8 h,and sintering at 700-780 DEG C for 10-15 h; and cooling the sintered mixture to room temperature to prepare the positive electrode material. The material obtained by the invention has the advantages of stable structure, excellent electrochemical performances, and reduction of the industrialization cost.

A process for preparing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group of ammonia and primary and secondary amines, in the presence of a supported copper-, nickel- and cobalt-containing catalyst, wherein the catalytically active material of the catalyst, before the reduction thereof with hydrogen, comprises oxygen compounds of aluminum, of copper, of nickel, of cobalt and of tin, and in the range from 0.2 to 5.0% by weight of oxygen compounds of yttrium, of lanthanum, of cerium and/or of hafnium, each calculated as Y₂O₃, La₂O₃, Ce₂O₃ and Hf₂O₃ respectively, and catalysts as defined above.

The invention relates to a gallium nitride semiconductor film, a gallium nitride-based light emitting dioxide and a corresponding preparation method therefor. The preparation method for the gallium nitride semiconductor film comprises the following steps of: bombarding a gallium-containing target and a substrate by using double ion sources, respectively, and filling the primary ion source with argon to generate argon ion beams to bombard the gallium-containing target and generate sputtering particles which are deposited on the substrate; and filling the secondary ion source with ammonia or nitrogen to generate nitrogen ions to bombard the surface of the substrate, wherein the nitrogen ions are combined with the sputtering particles deposited on the surface of the substrate to generate the gallium nitride semiconductor film. According to the invention, the primary ion source generates the argon ions to bombard the gallium-containing target and the nitrogen ions generated by the secondary ion source generate gallium nitride by virtue of a chemical reaction, and the nitrogen ions are directly supplemented to the surface of the substrate by way of shallow injection, so that the content of element nitrogen in the gallium nitride semiconductor film can be effectively improved, and the proportioning error of the element nitrogen and the element gallium is overcome, and the prepared thin is uniform in thickness and high in precision.

The invention belongs to the field of a lithium ion battery material, and discloses a titanium dioxide-copper oxide nano compound and a preparation method and an application thereof. The preparation method comprises the steps of adding nanometer TiO<2> and Cu(Ac)<2>.H<2>O into a solvent, and performing ultrasonic treatment, stirring and mixing uniformly to obtain a turbid liquid; next, dropwise adding stronger ammonia water to adjust PH to be alkali, heating to 85-95 DEG C and reacting for 10-15h, and performing natural cooling after the reaction is completed; and performing washing and dryingon the obtained solid product, and next, performing calcining in the air atmosphere at a temperature of 300-450 DEG C for 3-8h to obtain the titanium dioxide-copper oxide nano compound. The preparation method is simple and easy to implement, and energy-saving and environment friendly; and the obtained TiO<2>-CuO nanometer compound, when used as the negative electrode material of the lithium ion battery, is excellent in electrochemical performance.

The present invention discloses a method for preparing a silica sol modified azodicarbonamide foaming agent, and belongs to the field of preparation of foaming agents. According to the method, methyltrimethoxysilane and sodium dodecyl benzene sulfonate are mixed for preparation of a modified silane solution, then ammonia water is dropwise added into the modified silane solution for preparation of silica hydrosol, by mutual dispersion of the silica hydrosol and azodicarbonamide, the azodicarbonamide is fully mixed by silica, and the purposes of not easy agglomeration and moisture absorption of the prepared foaming agent can be achieved. The beneficial effects are that: the preparation method is simple, after the prepared product is mixed with a liquid or a paste-like polymer, the product is not easy to agglomerate; when the foaming agent is used in foaming, particles are dispersed uniformly, the product surface is smooth and free of pocking marks, and the use effect is good.

The invention provides a system for continuously recycling a waste ternary lithium-ion battery and belongs to the technical field of recycling of lithium-ion batteries. The system comprises a pre-treatment unit, an acid leaching unit, a primary impurity removal unit, a co-precipitation unit, a secondary impurity removal unit and an ammonia recycling unit, wherein the pre-treatment unit comprises apulverizer, a pulse dust collection device, a positive and negative electrode powder cabin and a separation machine; the acid leaching unit comprises a leaching reaction kettle and a micro-filteringmachine I; the primary impurity removal unit comprises an impurity removal reaction kettle and a squeezing machine; the co-precipitation unit comprises a material preparation kettle, a co-precipitation reaction tank and a centrifugal machine; the secondary impurity removal unit comprises a secondary impurity removal reaction kettle and a micro-filtering machine II; the ammonia recycling unit comprises a heater, an evaporation crystallization device, a condenser and an ammonia liquid receiving tank. The invention further provides a technology for continuously recycling the waste ternary lithium-ion battery by utilizing the system. According to the system provided by the invention, a prepared nickel-cobalt-manganese ternary material precursor has high purity and large tap density; grains have a small grain diameter and narrow distribution and are uniformly mixed; a lithium sulfate solution can be directly used for producing lithium carbonate.

The invention relates to a preparation method of D-p-hydroxyphenylglycine methyl ester. The preparation method comprises the following steps: (1) esterifying: carrying out an esterification reaction on D-p-hydroxyphenylglycine and methanol to obtain D-p-hydroxyphenylglycine methyl ester sulfate, and distilling off methanol and water under reduced pressure, wherein the D-p-hydroxyphenylglycine is added one time, and the methanol is added in batches; and (2) crystallizing the D-p-hydroxyphenylglycine methyl ester. The preparation method can very easily control the reaction endpoint, so that theyield and the quality index of the finished product can be guaranteed to the maximum extent; the preparation method provided by the invention avoids the problems of safety and operation caused by hydrogen chloride gas or thionyl chloride; and in the step of D-p-hydroxyphenylglycine methyl ester crystallization, an alkali metal hydroxide is used for adjusting the pH value of the system without using ammonia water, so that the problem that ammonia ions are difficult to treat is avoided.

The invention provides water-based matte gloss oil for gravure printing, and a making method thereof, which is characterized in that the water-based matte gloss oil comprises the following in proportion by weight: 20 to 30 percent of the polymer water-based resin fluid, 25 to 35 percent of the water-based synthetic acrylic emulsion, and 15 to 20 percent of the matte slurry, wherein matte slurry consists of mixed liquid of ethanol and ethyl ester with the weight ratio of 6 to 4, and 30 to 35 percent of extinction powder, and the water-based matte gloss oil also comprises the following in proportion by weight: 1 to 3 percent of the water-based defoamer, 5 to 10 percent of the water-based wax paste, 0.5 to 2 percent of the anti-scratch agent, and 8 to 10 percent of the ammonia, ethanolamine, alcohol or ethyl ester. The water-based matte gloss oil has the advantages of thoroughly changing the problem of residual organic matter in printed matter, achieving zero pollution emission in the process of drying the matte gloss oil and reducing harm to operators.

An ice rink cooling facility 100 in which a cooling-pipe bank 1 having a plurality of cooling pipes 11 is arranged at the bottom part of the ice rink 10 and CO₂ brine streams through the cooling pipe bank 1 so as to cool the ice rink 10, the ice rink cooling facility 100 including, but not limited to: at least one planar heat conduction member that is arranged on and over the cooling pipes 11; a CO₂ circulation circuit 3 that is connected to the cooling pipes 11 so that the CO₂ brine circulates in the CO₂ circulation circuit 3; an ammonia refrigerating cycle in which an ammonia refrigerant circulates; and, a cascade condenser 211 in which the heat exchange is performed between the CO₂ brine and the ammonia refrigerant so that the CO₂ brine is cooled and re-liquefied by use of the ammonia refrigerant.

The invention discloses a powdery active coke fluidized bed desulfurization, ammonia injection and denitration combined system and method. The method includes the steps: 1) enabling dedusted flue gasto flow into a fluidized bed desulfurization tower and contact with sulfur-containing active coke and catalyzed powdery active coke, and removing sulfur dioxide in the flue gas by adsorption; 2) enabling the desulfurized flue gas after gas-solid separation to enter a fluidized bed denitration tower, adding ammonia and the powdery active coke, enabling powdery active coke to catalyze the ammonia toreduce nitric oxide in the flue gas into nitrogen, and removing the nitric oxide; (3) separating the flue gas after denitration by the aid of a second gas-solid separator and a bag-type dust collector, conveying the separated flue gas into a chimney, recycling the sulfur-containing coke separated by a first gas-solid separator into the fluidized bed desulfurization tower to be circularly used, and recycling circulating coke separated by a second gas-solid separator into the fluidized bed desulfurization tower to be circularly used, and adding the catalyzed powdery active coke separated by thebag-type dust collector into the fluidized bed desulfurization tower to perform desulfurization.

The invention provides a making method and a use of silica constructed superhydrophobic melamine sponge. The method comprises the following steps: 1: cleaning melamine sponge: cleaning the melamine sponge in hydrochloric acid, washing the melamine sponge with water until the melamine sponge is neutral, and drying the washed melamine sponge; 2, preparing an aqueous vinyltriethoxysilane dispersion: adding an ethyltriethoxysilane additive into deionized water, and fully stirring the ethyltriethoxysilane additive and the deionized water to obtain the aqueous vinyltriethoxysilane dispersion; and 3, making the silica constructed superhydrophobic melamine sponge: immersing the melamine sponge obtained in step 1 in the aqueous vinyltriethoxysilane dispersion obtained in step 2, dropwise adding ammonia water, and drying the melamine sponge to obtain the silica constructed superhydrophobic melamine sponge. The melamine sponge used as the sponge has rich sources and a low price.

The invention discloses a preparation method of nano-magnesium hydroxide. The preparation method comprises the following steps: carrying out ultrasonic dispersion on ammonia water and a sodium hydroxide solution so as to obtain a mixed alkali solution, and adding the mixed alkali solution into a reactor; putting the reactor in an ultrasonic field, dropwise adding a polyethylene glycol 6000 water solution into the reactor in a constant speed, and further carrying out ultrasonic dispersion for 0.5-1 hour; dropwise adding a magnesium chloride water solution into the reactor in a constant speed; after the dropwise adding of the magnesium chloride water solution, further carrying out ultrasonic dispersion for 0.5 hour; adding turbid liquid obtained in the reaction into a hydrothermal reaction kettle for treatment, so as to obtain Mg(OH)2 precipitates; and carrying out suction filtration, washing, drying and grinding on the precipitates, so as to obtain nano-Mg(OH)2. Nano-magnesium hydroxide is prepared by virtue of an ultrasonic-hydrothermal coupling method, and reaction conditions are easily controlled, so that the problems that nano-Mg(OH)2 particles easily form colloid in a solution and are unlikely to be filtered are solved; and the particle size of the prepared nano-Mg(OH)2 particles is small, the particle size distribution is uniform, the crystallization degree is high, the technical flow of the preparation method is simplified, the energy consumption is reduced, and the production cost is saved.