116 results about "Trisodium phosphate" patented technology

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a water quality stabilizer suitable for in-furnace treatment of medium-pressure, high-pressure and ultrahigh-pressure boilers and a preparation method of the water quality stabilizer. The water quality stabilizer comprises polyamine organic amines, an organic deoxidant, high-molecular polymeric salt, a silt adjusting agent and pure water. According to the water quality stabilizer disclosed by the invention, one medicament can replace three medicaments of ammonia water, hydrazine and trisodium phosphate added in a traditional boiler, the water quality stabilizer has multiple functions of film forming, corrosion inhibition, deoxygenization, passivation, scale inhibition, scale dissolution, dispersion, chelation, water quality stabilization and the like, meanwhile, the discharge capacity of the boiler can be greatly reduced, the heat energy loss and the water waste can be reduced, and the heat energy utilization rate can be improved. The preparation method disclosed by the invention has the advantages of good batch production effect, stable product performance and long shelf life.

The invention relates to a method for treating a waste iron phosphate positive electrode material by a phosphoric acid-hydrogen peroxide method matched with a specific complexing agent. The method comprises the following steps: crushing the positive electrode material of the waste lithium iron phosphate battery, adding the crushed positive electrode material into deionized water, and stirring to prepare slurry; heating the slurry, dropwise adding a phosphoric acid-hydrogen peroxide mixed solution and a complexing agent, adding a NaOH solution to adjust the pH value to 3.5, and filtering to obtain a filtrate and a filter cake; adding a NaOH solution into the filtrate, and adjusting the pH value to 10 to obtain lithium phosphate; performing evaporative crystallization on the filter cake to obtain trisodium phosphate; the complexing agent is prepared by adding pentasodium salt of amino trimethylene phosphonic acid, triallyl citrate, epoxysuccinic acid and DMF (Dimethyl Formamide) into a reaction kettle, mixing, adding ammonia water to adjust the pH value to be 10, and distilling to remove the DMF after the reaction is finished. The precipitation rate of Fe reaches up to 99.99%, the leaching rate of Li reaches up to 99.91%, and efficient separation and recycling of lithium and iron are achieved.

The invention discloses fluoride-salt-free and nitrate-free high-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 840-880 DEG C and the firing time of 820-830 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free low-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for steel plate substrates, the firing temperature is 760-800 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention relates to an emulsifier composition for meat products as well as a preparation method and application of the emulsifier composition. The emulsifier composition disclosed by the invention is prepared from the following components in parts by weight: 5 to 10 parts of sodium caseinate, 0 to 5 parts of sucrose fatty acid ester, 10 to 15 parts of collagen, 5 to 10 parts of glutamine transaminase, 60 to 70 parts of maltodextrin, 0 to 5 parts of sodium pyrophosphate and 0 to 5 parts of trisodium phosphate. The invention relates to a meat product containing the emulsifier composition, wherein the amount of the emulsifier composition accounts for 0.6%-1% of the total weight of the meat product. According to the invention, the obvious compounding effect among the monomer emulsifier, collagen, phosphate and glutamine transaminase is fully utilized, the functional complementation principle of various raw materials is exerted, and the synergistic interaction effect is generated. On the basis of enhancing the taste of the meat product, the oil and water retention property is improved to a greater extent, so that the yield is improved, and the production cost is reduced.

The invention belongs to the technical field of rare earth ore concentrate treatment, and particularly relates to a method for recycling fluorine, phosphorus and rare earth through mixed rare earth ore concentrate hydrochloric acid leaching and two-step alkaline decomposition. The method comprises the following steps: mixing hydrochloric acid and mixed rare earth concentrate, reacting and leaching to obtain acid leached mixed ore and an acidic rare earth chloride solution; uniformly stirring the acid-leached mixed ore and a sodium hydroxide solution A, heating for reaction, adding water for washing, filtering to obtain a first-step alkali cake and a first-step alkali liquor, and concentrating the first-step alkali liquor to obtain sodium fluoride; uniformly stirring the first-step alkali cake and a sodium hydroxide solution B, and treating to obtain a second-step alkali cake and a second-step alkali solution; treating the two-step alkali liquor to obtain trisodium phosphate dodecahydrate; and putting the two-step alkali cake into an acidic rare earth chloride solution, and treating to obtain rare earth chloride feed liquid. The method for recycling fluorine, phosphorus and rare earth through hydrochloric acid leaching and two-step alkaline decomposition of the mixed rare earth concentrate has the advantages of being low in production cost, small in three-waste generation amount, easy to operate and high in rare earth, fluorine and phosphorus recycling rate.

The invention discloses a probiotic chitosan microsphere and a preparation method thereof, and belongs to the technical field of probiotic embedding, and the method comprises the following steps: dissolving trehalose and L-glutamine in water, suspending lactic acid bacteria in the water, mixing with a chitosan solution to obtain a mixed solution, dropwise adding the mixed solution into a sodium tripolyphosphate solution, and stirring to obtain the probiotic chitosan microsphere. And washing insoluble substances, and performing freeze drying to obtain the probiotic chitosan microspheres. The trehalose and the L-glutamine are used as protective agents and nutrient substances of the probiotics at the same time, can synergistically improve the survival rate of the probiotics, are matched with other components, comprehensively improve the tolerance and activity of the probiotics, and are combined with a specific curing means and freeze drying, so that damage of high temperature to the probiotics can be avoided; the obtained microspheres have good probiotic protection capability, stability and appropriate release performance, can effectively improve the survival rate of the probiotics in storage and application processes, and can better play roles in improving intestinal flora and improving the health level of hosts.

The invention discloses a construction method and application of an electrochemical luminescence (ECL) biosensor based on a cell membrane hydrogel antifouling interface, and belongs to the technical fields of photo / electrochemical analysis, interface antifouling and biosensing. According to the invention, the cell membrane hydrogel is used as an efficient antifouling interface, so that non-specific adsorption of interfering proteins in a sample to be detected is hindered, and the service life of the biosensor is prolonged. Meanwhile, a luminophor copper nanosheet and a quencher MnO2 nanosheet are both introduced into the cell membrane hydrogel, in the presence of alkaline phosphatase (ALP), L-ascorbic acid-2-trisodium phosphate is catalyzed and hydrolyzed into ascorbic acid, and then MnO2 is reduced to recover ECL emission of the copper nanosheet. Therefore, the ECL signal of the biosensor is in a rising trend along with the rising of the ALP concentration. Based on this, the constructed ECL biosensor realizes sensitive detection of ALP, the linear range is 10 <-5 >-10 < 4 > U / L, and the detection limit is as low as 3.4 * 10 <-6 > U / L, which indicates that the ECL biosensor has potential application in clinical diagnosis.

The invention discloses a method for preparing battery-grade lithium phosphate and iron phosphate by recycling waste lithium iron phosphate batteries, and belongs to the technical field of lithium ion battery recycling. The method comprises the following steps: mixing and calcining black powder recovered from the waste lithium iron phosphate battery and sodium persulfate; adding water for dissolving, filtering to obtain a water leaching solution A and leaching residues, washing the leaching residues with water, and calcining at high temperature to obtain battery-grade iron phosphate; adding a sodium hydroxide solution into the water extract A, and reacting to obtain a water extract B; adding a trisodium phosphate solution into the water immersion liquid B, performing suction filtration after reaction to obtain lithium phosphate and filtrate, and cleaning and drying the lithium phosphate to obtain battery-grade lithium phosphate; and freezing and denitrifying the filtrate to obtain a denitrified solution, and adding the denitrified solution into the sodium hydroxide solution for recycling. The filtrate is recycled in the whole production process, zero loss of the lithium element is theoretically realized, the iron element is prevented from entering the solution, the preparation steps of the lithium phosphate are simplified, and the method has the advantages of economy and environmental protection.

The invention relates to the technical field of resource recycling of waste lithium iron phosphate batteries, in particular to a waste lithium iron phosphate battery full-cycle low-carbon slag-free recycling method which comprises the following steps: S1, pretreatment: sorting out lithium iron phosphate black powder and carrying out heat treatment, S2, copper recycling: preparing basic copper carbonate and copper extraction slag by using the lithium iron phosphate black powder, and S3, recycling copper from the copper extraction slag. The method comprises the following steps: S1, preparing copper extraction slag, S2, preparing sodium phosphate, S3, recycling lithium: preparing battery-grade lithium carbonate and lithium extraction slag from the copper extraction slag, S4, recycling phosphorus and aluminum: preparing aluminum phosphate, trisodium phosphate dodecahydrate and phosphorus extraction slag from the lithium extraction slag, S5, recycling iron: preparing iron phosphate and graphite slag from the phosphorus extraction slag, and S6, recycling graphite: preparing a regenerated graphite negative electrode material from the graphite slag. According to the method, all the component elements in the lithium iron phosphate black powder are comprehensively recycled, the total recycling efficiency of all the component elements is greatly improved, the output of pollutants is reduced, and the green production level is improved.

The invention discloses a mixed rare earth concentrate treatment method. The treatment method comprises the following steps that mixed rare earth concentrate reacts with first hydrochloric acid, and chemical separation ore and chemical separation liquid are obtained; roasting the chemical ore to obtain roasted ore; carrying out primary alkaline hydrolysis reaction on the roasted ore and a first alkaline solution to obtain a primary alkaline hydrolysis product; washing the primary alkaline hydrolysis solid product with water to obtain an alkali cake I and alkali washing liquid I; sodium fluoride in the washing alkali liquid I is separated out, and sodium fluoride and residual alkali I are obtained; carrying out a secondary alkaline hydrolysis reaction on raw materials comprising a phosphorus-containing material and a second alkaline solution to obtain a secondary alkaline hydrolysis product; washing the secondary alkaline hydrolysis solid product with water to obtain an alkali cake II and an alkali washing solution II; and separating out trisodium phosphate in the alkali washing liquid II to obtain trisodium phosphate and residual alkali II. According to the method, the fluorine element and the phosphorus element in the mixed rare earth concentrate can be recycled respectively, and the purity of the obtained sodium fluoride and trisodium phosphate is high.

The application belongs to the technical field of inorganic fine chemical phosphate purification, and provides a high-purity trisodium phosphate and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a trisodium phosphate saturated crude slurry; (2) adjusting the quality of the slurry: after the trisodium phosphate saturated crude slurry is warmed, it is placed and kept warm; (3) purification: the temperature of the adjusted slurry is controlled and kept; then, anhydrous trisodium phosphate homologous slow-release seeds are added into the slurry; the system supersaturation is adjusted in two stages; the stirring is stopped to perform normal-pressure static crystal growth, and the purified slurry is obtained; and (4) post-treatment. The prepared high-purity trisodium phosphate has extremely low impurity contents of heavy metals and anion by-products, and has regular crystal morphology and strong crystal form stability, and is not prone to problems such as caking and hydrolysis during storage.

The invention belongs to the technical field of wafer processing, and particularly relates to an organic etching solution for etching a groove of a quartz wafer and application of the organic etching solution. The organic etching liquid comprises 10%-20% of hydrogen fluoride, 20%-30% of ammonium bifluoride, 40% of pure water, 10%-12% of trisodium phosphate, 4%-8% of sodium chromate and 2% of polyethylene glycol. According to the organic etching solution prepared by the invention, the stability of the tuning fork quartz frequency chip is improved, the electrical property of the tuning fork quartz frequency chip is improved, the corrosion shape of the groove can be controlled by changing the corrosion rate of different crystal faces, and the effect of improving the performance is achieved.

The application discloses a tundish slag line dry material, and relates to the technical field of tundish refractory materials. The mass percentage of each raw material component in the tundish slag line dry material is as follows: 26-30% of 3-1mm fused magnesite, 22-28% of 1-0mm fused magnesite, 20-27% of 200-mesh fused magnesite, 1.5-2% of trisodium phosphate hexahydrate, 2-2.5% of sodium metasilicate nonahydrate, 1-1.5% of adipic acid, 4-5% of calcium carbonate, 0.3-0.5% of vermiculite, and the rest of 5-3mm fused magnesite. The application adopts a new composite binder system, solves the environmental protection problem of a traditional phenolic resin binder, and significantly improves the medium-temperature and high-temperature strength, corrosion resistance, thermal shock resistance and heat insulation performance of the magnesia dry material through the synergistic effect among the components, so that the overall optimization of the material performance is realized.

A patch composition for targeting herpes virus comprising the following ingredients: a patch base, trisodium phosphate, malic acid, sorbitol, sodium benzoate, cellulose gum, peppermint, sodium saccharin, naringin, wind wheel grass extract, xanthan gum, polyethylene glycol-8, calcium carbonate, hydroxyethyl cellulose, hydroxypropyl guar gum, sodium nitrate, hydrated silica, sodium lauryl sulfate, strontium chloride hexahydrate, tranexamic acid, two-faced needle extract, sodium monofluorophosphate, sea salt, potassium nitrate, sodium chloride, and purified water q.s.

The invention discloses a fluoride-salt-free and nitrate-free steel plate enamel high-temperature titanium creamy yellow cover glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The cover glaze is prepared from quartz, anhydrous borax, rutile, potassium feldspar, trisodium phosphate, potassium carbonate, potassium dichromate and zinc oxide according to a specific mass ratio. The preparation method comprises the following steps: mixing the raw materials, melting at 1300 + / -10 DEG C in a pure oxygen environment, and quenching after wiredrawing to detect a molten state. The overglaze completely avoids the use of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are solved from the source, the fluorine content of the product is not detected through detection, the product meets the European Union REACH regulation limit value requirements, and meanwhile, the overglaze has good hue, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 840-880 DEG C and the firing time of 820-830 minutes, and has good application prospects. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free medium-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 800-840 DEG C and the firing time of 20-30 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a preparation method of an anti-freezing asphalt mixture. The preparation method comprises the following steps: S1, preparing and pretreating raw materials; s2, preparing a core material solution; s3, forming a wall material solution; s4, mixing the core material solution and the wall material solution according to a ratio of 4: 1, drying and curing to prepare an anti-freezing agent; s5, preparing an asphalt mixture, namely doping the anti-freezing agent prepared in the step S4 into the asphalt mixture according to a replacement rate of 30-60% to prepare a sample; and S6, detecting the characteristics of the sample through a freeze-thaw cycle experiment, and producing finished products in batches after the sample is detected to be qualified. When raw materials for preparing the anti-freezing agent are selected, polyethylene glycol is adopted as a slow-release base, trisodium phosphate is adopted as a corrosion inhibition base, through the synergistic effect of the slow-release base and the corrosion inhibition base, polyethylene glycol is utilized to form a hydrophobic shell to delay release of chloride ions, trisodium phosphate is hydrolyzed to generate a calcium phosphate passive film to inhibit corrosion of steel bars, and the corrosion resistance of the steel bars is improved. The two synergistically prolong the chloride ion release period and reduce the corrosion rate of the carbon steel.

The application discloses a steel plate enamel high-temperature cobalt-nickel ground glaze free of fluorinated salt and nitrate, a preparation method and application thereof, and belongs to the technical field of enamel. The ground glaze is prepared from quartz, zero-water borax, soda ash, potassium carbonate, trisodium phosphate, potassium feldspar, iron oxide and recycled ternary battery positive electrode material according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1290±10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The ground glaze completely avoids the use of fluorinated salt and nitrate, eliminates the problems of fluoride emission and environmental protection equipment blockage from the source, the fluorine content of the product is not detected, and the product meets the limit value requirements of the EU REACH regulation. Meanwhile, by introducing the recycled ternary battery material, the adhesion of the ground glaze is obviously enhanced, the synergistic effect between components is strengthened, other performances are promoted, and resource recycling and cost reduction are realized.

The application discloses a treatment method of mixed rare earth concentrate. The treatment method comprises the following steps: reacting the mixed rare earth concentrate with first hydrochloric acid to obtain a roasting ore and a roasting liquid; roasting the roasting ore to obtain a roasted ore; performing a first alkali dissolution reaction on the roasted ore and a first alkali solution to obtain a first alkali dissolution product; washing the first alkali dissolution solid product with water to obtain an alkali cake I and a washing alkali liquid I; precipitating sodium fluoride in the washing alkali liquid I to obtain sodium fluoride and residual alkali I; performing a second alkali dissolution reaction on raw materials comprising phosphorus-containing materials and a second alkali solution to obtain a second alkali dissolution product; washing the second alkali dissolution solid product with water to obtain an alkali cake II and a washing alkali liquid II; precipitating trisodium phosphate in the washing alkali liquid II to obtain trisodium phosphate and residual alkali II. The method can recover the fluorine element and the phosphorus element in the mixed rare earth concentrate respectively, and the obtained sodium fluoride and trisodium phosphate have high purity.

The application discloses a nemonoxacin malate capsule and a preparation method thereof, and belongs to the technical field of pharmaceutical preparations. The nemonoxacin malate capsule comprises the following components in parts by weight: 80-90 parts by weight of nemonoxacin malate hemihydrate, 10-20 parts by weight of a filler, and 1 part by weight of a hollow capsule. The filler is composed of essential components and optional components. The essential components are anhydrous lactose and glycerin monostearate compound. The optional components are selected from one or more of polyethylene glycol, hydrogenated vegetable oil, sodium aluminum silicate, magnesium stearate, glycerin distearate, microcrystalline cellulose, chitosan and anhydrous trisodium phosphate. The novel excipients not only effectively establish the good in-vivo and in-vitro correlation of the nemonoxacin malate capsule, but also improve the problems of large individual drug difference and poor stability.

The embodiment of the invention provides a preparation method of a micro-arc oxidation film layer on the surface of a magnesium alloy component. The preparation method comprises the steps of preparing a pretreatment solution and preparing a micro-arc oxidation electrolyte. Wherein the pretreatment solution comprises sodium dihydrogen carbonate, trisodium phosphate and inorganic acid. The micro-arc oxidation electrolyte comprises sodium fluoride, sodium dihydrogen phosphate and silver nitrate. When the magnesium alloy component is treated, firstly, the magnesium alloy component is placed in a pretreatment solution for pretreatment, and then the magnesium alloy component is cleaned with pure water; then, the magnesium alloy component is placed in a micro-arc oxidation electrolyte, a power source is connected for electrolytic treatment, and a micro-arc oxidation film layer is prepared; and finally, the micro-arc oxidation film layer on the surface of the magnesium alloy component is heated and dried, and the micro-arc oxidation film layer is prepared.

The application provides a method for removing iron and aluminum from high-aluminum material liquid under low pH value in a purification process in hydrometallurgy, and comprises the following steps: S1, providing high-aluminum material liquid, wherein the high-aluminum material liquid contains nickel, cobalt, manganese, iron, aluminum and lithium, and the initial pH value of the high-aluminum material liquid is controlled to be 1-2; S2, adding an excess of oxidizing agent into the high-aluminum material liquid to completely oxidize ferrous iron into ferric iron; S3, pumping the high-aluminum material liquid and a trisodium phosphate solution into a reactor to react for 10-30 minutes, and stabilizing the reaction end point pH value at 3-3.5; S4, sampling and testing to determine whether the iron and aluminum meet the purification requirements, and if yes, entering step S5; and S5, finally, filtering the reaction material liquid. The application adopts the method of generating iron phosphate and aluminum phosphate precipitates under normal pressure, low temperature and low pH value to achieve the purpose of removing iron and aluminum, the iron and aluminum precipitates have large particles and very low valuable metal content, the nickel and cobalt yield of the process can reach more than 97.5%, and the lithium yield can reach more than 99%.

The invention relates to a smelting acidic high-concentration iron-containing sewage treatment method, and aims to solve the technical problem that reuse water turns yellow and green. According to the technical scheme, the method comprises the following steps: discharging acidic high-concentration iron-containing sewage and lime emulsion overflowing from a lime emulsion tank into a first-stage reaction tank, stirring, adjusting the pH value to be greater than 7, adding trisodium phosphate solid into a preparation tank, preparing a trisodium phosphate solution, conveying the trisodium phosphate solution to an oxidation tank, introducing compressed air into the oxidation tank at the same time, the liquid in the oxidation tank overflows to a second-stage reaction tank, and the PH of the solution in the second-stage reaction tank is controlled to be 7.8-8.5; liquid in the second-stage reaction tank overflows to a sewage thickening pool for sedimentation, bottom flow is filtered by a filter press to generate reuse water, and trisodium phosphate and calcium ions in the sewage generate calcium phosphate precipitates. The acidic high-concentration iron-containing sewage treatment process disclosed by the invention has the advantages of preventing the recycled water from yellowing and greening, reducing the hardness of the recycled water, improving the utilization rate of the recycled water and the like.

The invention belongs to the field of wastewater treatment, and discloses a method for treating vitamin B6 wastewater, which comprises the following steps: 1, diluting filtered vitamin B6 wastewater to CODlt; the concentration is 60000 mg / L, and obtaining first wastewater. And 2, carrying out subcritical water catalytic oxidation on the first wastewater to obtain second wastewater. And 3, adding alkali into the second wastewater for deamination to obtain third wastewater. 4, freezing the third wastewater to extract sodium phosphate dibasic dodecahydrate crystals, so as to obtain fourth wastewater. And 5, circularly carrying out membrane concentration treatment on the fourth wastewater, returning membrane concentrated water to the step 2, carrying out subcritical water catalytic oxidation, carrying out evaporative crystallization on membrane permeate liquid to obtain sodium chloride, and freezing the membrane concentrated water after each time of membrane concentration treatment to extract disodium hydrogen phosphate dodecahydrate crystals. And 6, refining the disodium hydrogen phosphate dodecahydrate wet product to obtain the industrial trisodium phosphate dodecahydrate. According to the method, the high COD removal rate is achieved, and phosphate and sodium chloride are recycled.

Disclosed herein are penetration compositions comprising a 1,3-propanediol carrier and a binder or a copper-based wood penetration composition. The binder can be, e.g., sodium silicate, sodium carbonate, trisodium phosphate, potassium silicate, lithium silicate, magnesium silicate, calcium silicate, ammonium silicate, or a combination thereof. Also disclosed herein are methods of improving stability and penetration of binder into a substrate comprising impregnating the substrate with the presently disclosed penetration compositions.

This invention relates to the field of lithium extraction technology from lithium-containing organic wastewater, specifically to a method for preparing battery-grade lithium carbonate from lithium-containing organic wastewater. The method provided by this invention first recovers organic acids from the wastewater through esterification and hydrolysis reactions. Then, under pH 11-12 conditions, lithium is precipitated with trisodium phosphate to obtain crude lithium phosphate solid. The lithium is then enriched, dissolved in acid, and extracted to remove phosphoric acid. The raffinate is adjusted to pH 9-11 to remove impurities, yielding a lithium sulfate solution. After concentration using MVR (Medium-Volume Reduction), impurities are further removed under pH 10.5-11.5 and activated carbon adsorption conditions to obtain a pure lithium sulfate solution. The obtained pure lithium sulfate solution is mixed with a carbonate solution to obtain crude lithium carbonate. Finally, after washing, drying, crushing, and iron removal, battery-grade lithium carbonate is obtained.

The application discloses a steel plate enamel high-temperature titanium milk yellow face glaze free of fluorinated salt and nitrate, a preparation method and application thereof, and belongs to the technical field of enamel. The face glaze is prepared from quartz, zero-water borax, rutile, potassium feldspar, trisodium phosphate, potassium carbonate, potassium dichromate and zinc oxide according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1300+ / -10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The face glaze completely avoids the use of fluorinated salt and nitrate, eliminates fluorine emission and environmental protection equipment blockage problems from the source, the fluorine content of the product is not detected through detection, meets the limit value requirements of the EU REACH regulation, has good color, gloss and firing adaptability, is suitable for a steel plate substrate, has a firing temperature of 840-880 DEG C, and can be used for the production of green and environmentally-friendly enamel products.

A friction material includes a friction modifier, a binder, and a fibrous material. An alkali metal salt of phosphoric acid and a metal sulfide are contained as the friction modifier. The alkali metal salt of phosphoric acid may include trisodium phosphate. A wax containing, as a main component, an ester of a higher fatty acid and a higher alcohol may be contained as the friction modifier.