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994 results about "Sodium acid carbonate" patented technology

A method for recovering lithium and iron from electric vehicle lithium iron phosphate power battery

The invention discloses a method for recovering lithium and iron from a lithium iron phosphate power battery for an electromobile. The method comprises the following steps: 1) disassembling the lithium iron phosphate power battery so as to obtain a positive electrode material, smashing and screening so as to obtain a powder material; 2) adding an alkali solution in the powder material to dissolve aluminum and oxide of aluminum, and filtering so as to obtain filter mud; 3) lixiviating the filter mud with a mixed solution of an acid and a reducing agent so as to obtain lixivium; 4) adding an alkali to regulate the pH value of the lixivium to 1.5-3, precipitating to separate out iron hydroxide, and filtering so as to obtain filtrate; 5) firing iron hydroxide obtained in the step 4) so as to obtain iron oxide; 6) regulating the pH value of the lixivium to 5.0-8.0 with an alkali, precipitating impurities in the lixivium, and filtering so as to obtain filtrate; and 7) adding a solid sodium carbonate in the filtrate, and concentrating and crystallizing the obtained solution so as to obtain lithium carbonate. The recovering method disclosed by the invention has simple process, can be used for simultaneously recovering iron and lithium and can be directly used for production, and the purity of prepared lithium carbonate can reach above 98.5%.
Owner:GUANGDONG BRUNP RECYCLING TECH +1

Ultrafine lead oxide prepared from desulfurated lead plaster by means of three-stage process and method thereof

The invention discloses ultrafine lead oxide prepared from desulfurated lead plaster by means of three-stage process and a method for preparing the ultrafine lead oxide. The method comprises the following steps of: carrying out a desulfurization and lead plaster acid leaching process by causing the desulfurated lead plaster to react with acid, simultaneously adding a reducing agent, and carrying out solid-liquid separation after the reaction is ended to obtain a plumbic acid containing solution; carrying out a lead carbonate preparation process by causing the plumbic acid containing solution to react with sodium carbonate, carrying out solid-liquid separation, washing and drying to obtain the lead carbonate; carrying out a roasting process by preparing the ultrafine lead carbonate by roasting the lead carbonate, wherein the ultrafine lead oxide can be PbO, Pb3O4, or the mixture of the PbO and the Pb3O4, the mean particle granularity of the ultrafine lead oxide is less than 2 mu m, and the nanocrystalline grain size is less than 500nm. Compared with the prior art, the preparation method of the ultrafine lead oxide disclosed by the invention has the following beneficial effects: the active material of the ultrafine lead oxide powder compound for the production of a storage battery enterprise can be directly prepared, lead volatilize quantity is small, the ash rate is low, the direct lead yield is high, the energy consumption is low, pollutants of sulfur dioxide and the like are not generated, and the like.
Owner:湖北金洋冶金股份有限公司 +1

Silk-reeling technology by utilization of tussah fresh cocoon live pupae

The invention relates to a silk-reeling technology by the utilization of tussah fresh cocoon live pupae. The technology includes the steps that vacuum low-temperature permeation is performed on tussah fresh silkworm cocoons of the live pupae after refrigeration and freshness retaining in a vacuum environment at water temperature of 26 DEG C-40 DEG C, wherein the pH value is 6.5-8; according to vacuum low-temperature chemical cocoon reeling, water, sodium carbonate, sodium silicate, sodium borate, hydrogen peroxide and N-coconut oil-potassium glutamate form a reeling solution, and at temperature of 30 DEG C-46 DEG C, vacuumizing is performed for reeling in the pH value of 4-14; according to constant-temperature cocoon blanching, the cocoons are soaked in the reeling solution at temperature of 30 DEG C-40 DEG C for blanching; low-temperature silk reeling is performed, and raw silks are reeled again to be arranged to obtain a finished product. Pupa linings are manually removed from the silkworm pupae after silk reeling, so that the silk-reeling live pupae are obtained. The cocoons are not dried and cooked, silk reeling is directly performed, cost and energy consumption are reduced, and the survival rate of the by-products silk-reeling silkworm pupae is over 95%. Protein, amino acid and other kinds of nutrient active substances of pupa bodies are not affected, the utilization rate of the silk-reeling silkworm pupae is increased, breeding cocoons are provided for a sericulture department to perform orientated breeding, fine-breed breeding is accelerated, and the technology has great significance.
Owner:辽宁柞蚕丝绸科学研究院有限责任公司

Environment friendly water-base anti-rusting agent

The invention relates to an environment friendly water-base anti-rusting agent which is characterized in that the preparation method comprises the following steps: mixing, stirring and heating dodec dibasic fatty acid and triethanolamine at a mass ratio of 1:3 in a reaction vessel at the constant temperature of 83-87 DEG C for 2 hours to synthesize a water-soluble amine soap used as an anti-rusting agent monomer; decreasing the temperature of the anti-rusting agent monomer to 80 DEG C or lower, adding water which is 1/4 of the predetermined amount, and stirring and dissolving uniformly; heating the left 3/4 water to 40-45 DEG C, adding sodium tetraborate, sodium carbonate and sodium gluconate slowly in sequence according to the proportion showed in table 1, and stirring to dissolve completely; adding triethanolamine and glycerol to the solution slowly in sequence according to the proportion showed in table 1, adding a liquid formed by mixing the anti-rusting agent monomer with water, and stirring dissolve completely. The main synthesized anti-rusting agent monomer is dissolved in water, and an inhibitor, a film forming agent and additives which can take a synergistic effect are added, so that a uniform, transparent and non-layered liquid without precipitates is formed. The liquid is good in cast-iron and steel component rusting resistance and good in aluminum, aluminum alloy, copper and copper alloy corrosion resistance, can be used for resisting rusting for metal parte interprocess and warehouse storage and has a rusting resisting period of 40-60 day in summer in normal circumstances.
Owner:CHINA FIRST AUTOMOBILE

Method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder

The invention discloses a method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder. The method comprises the steps of conducting leaching and filtering through a sulfuric acid and sulfur dioxide system, adding lime milk into filtrate, adjusting the pH to 10-12, controlling precipitation, and conducting filtering to obtain a nickel-cobalt-manganese enriched product and lithium-containing filtrate; conducting purifying and impurity removal on the lithium-containing filtrate, adding a sodium carbonate solution for precipitation of lithium to obtain lithium carbonate; leaching the nickel-cobalt-manganese enriched product through sulfuric acid, adjusting the pH to 4-6, removing impurity iron and aluminum, and conducting solid-liquid separation to obtain purified slag and purified liquid; and adjusting the pH of the purified liquid to 4-5, conducting manganese extraction with P204 as an extraction agent, conducting cobalt extraction with P507 asan extraction agent, and conducting nickel extraction with P507 as an extraction agent. Through the method provided by the invention, the lithium recovery rate is greatly increased; moreover, sodium hydroxide generated from precipitation of lithium can be returned and continuously used in the lime milk nickel-cobalt-manganese enrichment process; and meanwhile, the yield of nickel sulfate, cobalt sulfate and manganese carbonate is increased.
Owner:XUZHOU GUOMAO VALUABLE & RARE METAL COMPREHENSIVE UTILIZATION INST

Method for comprehensive recovery of tantalum and niobium from red mud

The invention provides a method for comprehensive recovery of tantalum and niobium from red mud. The method comprises the following steps: mixing red mud with a reducing agent to carry out reducing roasting, and then carrying out magnetic separating to obtain magnetic iron ore concentrate and non-magnetic slag; fusing the non-magnetic slag and a mixture of sodium hydroxide and sodium carbonate at 500-800 DEG C to transform tantalum and niobium into sodium tantalum oxide and sodium niobate; crushing the molten massive melt, and heating, agitating and leaching by using a certain amount of acid, so that main ingredients of the non-magnetic slag, such as calcium, aluminum, silicon and a little of oxide of iron are dissolved, and the complicated compounds of tantalum and niobium are also decomposed to be transformed into hydroxide, but still reserved in the slag to be gathered; heating and dissolving the acid-leaching slag in a mixed acid of HF and HNO3; adding water and H2SO4 to dilute after cooling; carrying out tantalum and niobium separation and extraction on the diluted solution by adopting a liquid-film method. By adopting the method, not only can tantalum and niobium in the red mud be gathered, but also separate recovery and extraction of tantalum and niobium can be achieved.
Owner:GUIZHOU BRANCH CHINA ALUMINUM IND

Method for preparing battery-grade lithium carbonate and iron phosphate by recycling lithium iron phosphate anode waste

The invention relates to a method for preparing battery-grade lithium carbonate and iron phosphate by recycling lithium iron phosphate cathode waste, and belongs to the fields of electronic waste recycling and resourcing. According to the method, air is adopted as an oxidizing agent to oxidize lithium iron phosphate into iron phosphate, so that lithium is removed and enters a solution, and leaching of other impurity elements is little. A lithium solution is neutralized and precipitated to remove impurities, and saturated sodium carbonate is added to obtain a lithium carbonate product; and water leaching residues are mixed with iron powder and a small amount of phosphoric acid, ball-milling is implemented for activation reduction, a solid product obtained after activation is stirred and dissolved out by using a phosphoric acid solution, and an iron and phosphorus solution is obtained by filtering. The characteristic that ferric phosphate is low in solubility at high temperature is utilized, ferric phosphate sediment is obtained through a high-temperature evaporative crystallization method, and the ferric phosphate for the battery is obtained after aging, washing and calcining. The method has the advantages of cheap reagent, low acid consumption, high valuable element recovery rate, environmental friendliness and the like.
Owner:UNIV OF SCI & TECH BEIJING +1

Method for preparing babbitt alloy from residue containing silver of copper anode slime

The invention relates to a method for preparing a babbitt alloy from residue containing silver of copper anode slime. The method comprises the following steps:1, adding sodium carbonate, powdered carbon and borax according to the mass of the residue containing silver, and uniformly mixing; 2, melting to obtain a crude alloy containing lead; 3, preparing an electrolyte from fluosilicic acid, lead fluorosilicate, stannous oxide and potassium antimonyl tartrate, and adding with gelatin and ethyl naphthol; 4, treating the crude alloy as an anode and a stainless steel plate as a cathode, and taking the cathode plate (the stainless steel plate) and peeling cathode products each 12h; and 5, adding lead, antimony and copper or tin, antimony and copper to the cathode products, and melting to obtain the lead-based or tin-based babbitt alloy. The method which has the advantages of short flow, low cost, and strong practicality and allows the lead-based or tin-based babbitt alloy to be prepared from the residue containing silver of the copper anode slime is especially suitable for anode slime processing in electrolyzing electronic wastes with regenerated copper, and has the characteristics of simple and feasible operation, and high recovery rate of valuable metals.
Owner:广东省资源综合利用研究所

Method for preparing electronic-grade manganese sulfate by utilizing ferro-manganese alloy furnace slag

InactiveCN103274471ASimplify the impurity removal processReduce manufacturing costManganese sulfatesAluminum IonSodium sulphide
A method for preparing electronic-grade manganese sulfate by utilizing ferro-manganese alloy furnace slag comprises steps as follows: the ferro-manganese alloy furnace slag is ground to particles with particle sizes smaller than 250 mu m, sulfuric acid with the concentration of 30%-60% is added, and a solution is controlled to react for 1-3 hours at the temperature of 60 DEG C-90 DEG C and then filtered; the temperature of filtrate is controlled to be 60 DEG C-90 DEG C, sodium carbonate is added, and the pH value of the solution is adjusted to 4-6.5, so that iron ions and aluminum ions in the solution are hydrolyzed and generate corresponding hydroxide colloids; the solution is cooled to 30 DEG C-50 DEG C and stirred for 0.5-3 hours, so that the hydroxide colloids fully absorb silicon and scandium impurities in the solution, and still standing and filtration are performed; manganese fluoride is added to the filtrate to remove calcium and magnesium impurity ions, sodium sulphide is added to remove heavy metal impurity ions, and still standing and filtration are performed; the filtrate is concentrated, crystallized, washed, recrystallized, filtered and dried, so that an electronic-grade manganese sulfate product is obtained. According to the method, the ferro-manganese alloy furnace slag is taken as a raw material and used for preparing the electronic-grade manganese sulfate, so that the ferro-manganese alloy furnace slag can be recycled, pollution to the environment is reduced, and economic benefits can be obtained.
Owner:CENT SOUTH UNIV

High-pressure synthetic method of polyaryl sulfone resin of terpolymer and quadripolymer

ActiveCN103087309ALow costResolving Unable to Satisfy Aggregation RequirementsSodium acid carbonateNitrogen gas
The invention provides a high-pressure synthetic method of polyaryl sulfone resin of a terpolymer and a quadripolymer. The method comprises the following steps of: adding 4,4'-dichloro diphenyl sulfone, aromatic diphenol and Na2CO3 into a reaction kettle; then adding an amide solvent to solidify materials; extracting gas in the kettle to minus 0.08MPa, and introducing nitrogen to raise the pressure to 0.01MPa; repeatedly replacing gas in the kettle for 5 times and finally introducing nitrogen to raise the pressure in the kettle to 2.0-3.0MPa; heating the kettle, so that the temperature in the kettle reaches 200 DEG C constantly for 3 hours; and raising the temperature to 250 DEG C constantly for 6 hours and stopping reaction to obtain the polyaryl sulfone resin. The solvent with lower boiling point is adopted in a high-temperature and high-pressure hermetic system, so that the problem that the polymerization requirements cannot be met during constant pressure polymerization due to the low boiling point of the solvent, and meanwhile, the material cost is lowered. Sodium carbonate is used as a catalyst to solve the problem that potassium carbonate is used as the catalyst for dichloro-S hydrolysis; substances such as benzene, methylbenzene and dimethylbenzene are required to be added in constant-pressure polymerization to carry water. According to the invention, such substances are not required to be added, so that the process flows for removing the substances in the post-treatment process are avoided.
Owner:SHANDONG HORAN SUPER ENG PLASTICS

Loose-packed waterproof latex heavy ammonium nitrate oil explosive and preparation method thereof

The invention relates to loose-packed waterproof latex heavy ammonium nitrate oil explosive and a preparation method thereof. The loose-packed waterproof latex heavy ammonium nitrate oil explosive comprises the following components in parts by weight: 35.0-55.0 parts of ammonium nitrate, 0-7.0 parts of sodium nitrate, 7.0-13.0 parts of water, 0.01-0.05 parts of thiourea, 0.01-0.02 parts of sodium carbonate, 0.02-0.08 parts of acetic acid, 4.0-8.0 parts of composite oil phase, 0.06-0.12 parts of sodium nitrite and 25.0-50.0 parts of granulated ammonium nitrate. The preparation method of the loose-packed waterproof latex heavy ammonium nitrate oil explosive comprises the following steps of: according to the formula ratio, taking composite oil phase as continuous phase, taking water phase as dispersed phase, preparing latex substrate by a ground latex-preparing production line, transporting to a storage tank for later use, filling into an explosive loading truck when the heavy ammonium nitrate oil explosive is in use to transport to an explosion field, preparing the emulsion explosive by means of pumping and sensitizing, mixing with the granulated ammonium nitrate, and filling into an explosion blast hole, so that the latex heavy ammonium nitrate oil explosive can be prepared. The loose-packed waterproof latex heavy ammonium nitrate oil explosive provided by the invention is suitable for the explosive and the pre-filling explosive at the hard ore and the rock in a water hole, thereby being high in power, water-resistant, and low in cost.
Owner:ANSTEEL GRP MINING CO LTD

Method for recycling silver, copper and zinc from sintered ash in iron and steel plant

The invention relates to a method for recycling silver, copper and zinc from sintered ash in an iron and steel plant. The method comprises the following steps: (A) adding sintered ash into industrial water to prepare suspending slurry while stirring, and washing the sintered ash with water to remove soluble alkali metal; (B) adding ammonium hydroxide into filtered plaster, recycling silver, copper and zinc from plaster by adopting a complexing extraction mode, carrying out sedimentation or filtering separation on the extracted suspending slurry to obtain mixed solution containing silver ammonium, copper ammonium and zinc ammonium complexes and plaster containing heavy metals; (C) heating the mixed solution containing silver ammonium, copper ammonium and zinc ammonium complexes, dropwise adding formaldehyde or acetaldehyde to reduce into clustered sponge silver; filtering, washing and drying to obtain elemental silver; and adding excessive zinc powder into the filtered solution to displace out elemental copper, and filtering, acid pickling and drying to obtain elemental copper; and (D) evaporating a part of water out of zinc-containing solution after extraction of silver and copper, adding sodium carbonate to generate precipitated zinc carbonate, and filtering and calcining the precipitated zinc carbonate to prepare a zinc oxide product.
Owner:中冶南方(湖南)工程技术有限公司

Method for measuring content of alloy elements in ferrosilicon and silicon-aluminum-barium-calcium by X-ray fluorescent spectrometry

The invention discloses a method for measuring the content of alloy elements in ferrosilicon and silicon-aluminum-barium-calcium by X-ray fluorescent spectrometry, belongs to the technical field of physicochemical detection, and aims to solve the technical problem of corrosion of a platinum crucible during a sample melting manufacturing process. According to the technical scheme, the method comprises four steps: (1) oxidizing and melting a sample; (2) melting and manufacturing a sample piece; (3) drawing a working curve; (4) measuring the content of the alloy elements in the sample, wherein a sample oxidizing and melting container is a ceramic crucible which is filled with graphite carbon powder being higher than or equal to 99.85 percent in purity; a mixed flux is formed by mixing potassium nitrate, boracic acid and anhydrous sodium carbonate in the weight ratio of 1:2:3. According to the method, the possibility of the corrosion of the platinum crucible during the sample melting process is eliminated thoroughly by selecting the oxidizing container and the mixed flux; the problem about accurately analyzing and measuring the content of the alloy elements in the ferrosilicon and the silicon-aluminum-barium-calcium by the X-ray fluorescent spectrometry is solved by controlling an oxidizing agent, the melting temperature and the time and optimizing the weight the weighed sample and various reagents; therefore, the method has a good popularization prospect.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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