2490 results about "Sodium acid carbonate" patented technology

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%.

This invention relates to an electrolyte of a full-vanadium ionic fluid-flow battery composed of V salt sulfate, H2So4, water, alcohol and additives, which are Na2SO4, Na pyrophosphate, salufer and hydrogen peroxide. This invention also provides a preparation method: pumping qualified V liquid from a V-plant into a reaction tank, regulating the PH value of the solution and inletting liquid SO2 into it to be recovered, then the PH value of the solution is regulated with Na2SO4 to deposit VO2 to be dissolved in the solution containing H2SO4, water and alcohol to be added with the additives to be electrolyzed in the tank to get the V electrolyte with 50% of 3valence and 4 valence V separately and density of 1.0mol/L~4.2mol/L .

The invention relates to a bismuthyl carbonate micro flowery material with a graded structure, which is structurally characterized in that two-dimensional nano flakes are staggered to form a flower shape, and the average diameter of the flakes is 3 to 4 microns. The material is prepared by fist dissolving bismuth nitrate into dilute nitric acid and then gradually dripping the dilute nitric acid into excessive sodium carbonate solution and reacting the solution. A preparation method can be implemented at the low temperature and the normal pressure, and has the advantages of short time consumption, low cost, simple equipment, easy operation and large-scale production. Because of a large specific surface area, the prepared bismuthyl carbonate micro flowery material with the graded structure has important practical application in the aspects of pharmacy and sterilization; and meanwhile, the material with the large specific surface area has good performance in the aspect of degrading organic pollutants by photocatalysis.

The invention discloses a preparation method of a spherical high-capacity lithium-rich positive electrode material. A sintering process is improved through regulating a coprecipitation reaction mode. The preparation method comprises the following steps: 1, preparing a nickel-cobalt-manganese sulfate solution; 2, performing a coprecipitation reaction on the nickel-cobalt-manganese sulfate solution and a mixed solution of a carbon carbonate solution and ammonia water at a pH value of 7-9 to obtain a solid-liquid mixture of a precursor; 3, filtering, separating, washing and drying to obtain a carbonate precursor; 4, performing gradient temperature rise on the carbonate precursor in a tubular furnace and keeping the temperature, cooling, crushing and sieving to obtain a nickel-cobalt-manganese oxide; and 5, mixing the nickel-cobalt-manganese oxide with lithium carbonate powder, and performing multi-section ventilation roasting in the tubular furnace to obtain the target object. The preparation method has the advantages that the sintering process is improved through regulating the coprecipitation reaction mode, the granularity of the precursor is effectively controlled, and the high-capacity lithium-rich lithium ion positive electrode material with a layered crystal structure, which is high in energy density, good in rate capability, low in cost, good in safety and long in service life, is prepared, and the market demand is met.

The invention discloses a ceramic film abluent and preparing method, which comprises the following parts: 50-75 percent NaOH, 3-15 percent sodium polyphosphate, 5-15 percent sodium alkyl benzene sulphonate, 2-8 percent diatomite, 1-8 percent liquid glass, 0-5 percent sodium sulfate, 0-20 percent sodium carbonate, 0-5 percent methylol cellulose and 0-5 percent ethylene diamine tetraacetic acid tetrasodium salt. These components are added int the stirring and grinding corrosion-proof reactor sequently, which is stirred and grinded evenly at room temperature at 4-8 h to obtain the product. The invention shortens the system cleaning time and reduces the system consumption, which doesn't damage ceramic film.

The invention discloses melt-blown polypropylene as well as a preparation method and application thereof. The melt-blown polypropylene comprises following raw polypropylene resin, a degradation agent,an antioxidant and a lubricant, wherein the degradation agent is selected from one or more of hydrogen peroxide, sodium percarbonate, ammonium percarbonate and urea peroxide. The melt-blown polypropylene also comprises a nucleating agent selected from one or more of dibenzylidene sorbitol, aryl phosphate and nano scale amorphous silicon dioxide, wherein the degradation agent and the nucleating agent respectively account for 0.05-0.5% of the mass percentage of the raw materials. The preparation method comprises the following steps: premixing raw materials, stirring, then selectively adding a deodorant; and melting and granulating by an extruder to obtain the product. The invention also discloses an application of the melt-blown polypropylene in manufacturing melt-blown non-woven fabrics, melt-blown filter elements and sound-absorbing cotton. The melt-blown polypropylene has the advantages of low odor, high electret charge stability and the like.

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.

The invention relates to the technical field of sewage treatment and particularly relates to an industrial wastewater treating agent. The industrial wastewater treating agent comprises the following components in parts by mass: 0.8-3 parts of polyacrylamide, 25-35 parts of aluminium polychlorid, 25-55 parts of alums, 3-8 parts of iron trichloride, 0.8-3.4 parts of polymeric ferric sulfate, 1.2-2.5 parts of a coagulant aid, 2-10 parts of plant fiber, 10-30 parts of coal ash, 0.8-2.5 parts of sodium silicate, 2.5-5 parts of sodium sulfite, 0.5-3.5 parts of sodium hypochlorite, 5-10 parts of hydrogen peroxide, 8-15 parts of a sodium carbonate-sodium bicarbonate buffer system and 10-20 parts of sodium-based bentonite. The treating agent has the beneficial effects of wide treated pollutant range, good effect, wide production raw material source, environmental friendliness, no toxicity, good discharged water quality, short process flow, and high process operating safety. The treating agent disclosed by the invention can treat various kinds of wastewater such as chemical wastewater produced in oil fields, mining, steel, electroplating wastewater, dyes, pesticides, wine-making and chemical engineering, and sanitary sewage, papermaking wastewater, river and lake water, rubbish seeping water, leather-making wastewater, and the like; and the treating agent is good in treatment effect.

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.

The invention provides a preparation method of a superabsorbent resin used for a high-molecular gel extinguishing agent. The preparation method comprises: mixing acrylic acid and a sodium carbonate aqueous solution to prepare a neutralization solution; successively adding a cross-linking agent, an initiator and an adhesion promoter into the neutralization solution to prepare a polymerization solution; performing polymerization to prepare the superabsorbent resin; and cutting into particles with a diameter of 10-20 mm to further prepare superabsorbent resin particles with a particle size of 40-150 meshes. The preparation method is simple, and the superabsorbent resin prepared by the method is convenient to used and excellent in fire extinguishing effect.

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.

A bioavailable water soluble animal feed mineral composition which provides buffering of animal digestive fluids to near-neutral pH comprising an alkali metal magnesium phosphate hydrate providing a total of between 1.5 and 4.7 equivalent weights of alkali metal and magnesium per molecule of phosphorus. Water of hydration amounting to between 6 and 12 percent is required for effectiveness. An effective composition, Na2Mg(PO4) 0.8 H2O, is prepared by stepwise reaction of sodium carbonate and magnesium oxide with orthophosphoric acid in a rotating pan equipped for high intensity mixing.

The invention discloses a method for preparing an electronic ternary material precursor from Ni-Co residues. The method realizes combination of one or more physical and chemical methods. The method comprises the following steps of pre-treating Ni-Co-containing waste or waste residues so that Ni and Co are preliminarily separated from other substances, adjusting a mole ratio of Ni to Co in the Ni-Co-containing waste or waste residues to 1: (1-0.2), carrying out deep purification of other elements except Ni and Co by an extraction method, treating an Ni-Co group, carrying out separation purification to remove other impurities, wherein Ni and Co is not separated, and directly preparing the Ni-Co oxide precursor of the electronic ternary material by a metallurgical technology, and adding sodium carbonate or sodium hydroxide into a Ni and Co sulfuric acid solution to directly produce an Ni-Co carbonate or an Ni-Co hydroxide. An important characteristic or an innovation point of the method comprises that Ni and Co are combined in an ion level. The method improves environment influence, can produce a novel Ni-Co product and is conducive to resource recycle and environment-friendly development.

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.

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.

The invention relates to an additive product suitable for coal-fired boilers in the petroleum, chemical and power industries and provides a boiler coal combustion-improving denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-8 parts of sodium carbonate, 3-7 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 6-15 parts of urea, 4-10 parts of ammonium carbonate, 4-10 parts of ammonium chloride, 3-9 parts of ferric oxide, 7-22 parts of potassium permanganate, 7-22 parts of potassium chlorate, 15-40 parts of activated attapulgite clay, 4-8 parts of chromium sesquioxide, 2-6 parts of manganese oxide, 4-8 parts of zinc oxide, 4-8 parts of copper chloride, 2-6 parts of copper oxide, 2-6 parts of copper carbonate, 3-7 parts of zinc sulfate, 2-5 parts of zinc nitrate, 0.5-1.5 parts of barium molybdate, 1-2 parts of titanium oxide, 0.5-1.5 parts of vanadium pentoxide, 0.2-0.5 part of copper sulfate, 0.2-0.5 part of cerium oxide, 1-3 parts of penetrating agent JFC and 0.1-0.2 part of lignosulphonate. The composition is efficient in combustion improving, has high coal saving rate and prolongs the service lives of the boilers.

The invention discloses a titanium-doped lithium-enriched manganese-based lithium ionic battery cathode material and a preparation method thereof. The titanium-doped nickel cobalt lithium manganite has a chemical general formula of Li1.2Ni0.13Co0.13Mn(0.54-x)TixO2, and x is more than 0 and less than 0.123. According to the preparation method, a precursor [Ni0.13Co0.13Mn0.54]CO3 is prepared by utilizing sodium carbonate as a precipitator, regulating the pH value with industrial ammonia water and providing Ni, Co, Mn lithium-inserted substrate with a transition metal salt solution, the quantityrelative ratio of the precursor to the lithium source is M:Li being 1:1.4 (M is Ni, Co and Mn), and Li atoms is excessive by 3-8 percent; a titanium source is added into the precursor mixed with lithium in a ratio of 1.5-4.5g/ml, and is subjected to planet ball-mill mixing; and a solid phase is carried out at high temperature of 750-950 DEG C for 12-18 hours to prepare the titanium-doped lithium-enriched manganese-based lithium ionic battery cathode material with high capacity and long service life. The lithium ionic battery cathode material can be used for solving the problems of low specificcapacity and poor circulation performance of existing stratified lithium-enriched materials.