37 results about "Phosphorus acid" patented technology

The invention discloses a production method of ferrous dihydrogen phosphate, which comprises the following steps of: changing an iron source of iron-process iron phosphate from traditional iron blocks or iron powder into oxide scale, compounding phosphoric acid and sulfuric acid into mixed acid, and controlling the granularity of the oxide scale and the components and acidity of the mixed acid to solve the problems of dissolution and passivation of the oxide scale. According to the method, iron oxide scale can be better dissolved, the residual problem of ferric ions is solved by reducing excessive iron blocks or iron powder, undissolved impurities such as carbon, silicon and iron are removed by filtering, and finally, the stability problem of a reaction system is solved by adjusting the pH value of the system through industrial phosphoric acid and pure water, so that a ferrous dihydrogen phosphate solution required for producing iron phosphate is obtained. The production cost of an iron source required by iron phosphate is greatly reduced, other impurities are not contained, and mixed acid-containing filtrate and washing water generated in the production process can be recycled through an evaporation device.

According to the long-acting water-soluble alkali-adjusting fertilizer and the preparation method thereof, raw materials of the long-acting water-soluble alkali-adjusting fertilizer are preferably selected from fully water-soluble materials, the product is fully water-soluble, the content of water-insoluble substances is smaller than 0.2% (G4 water-insoluble substance standard), and the long-acting water-soluble alkali-adjusting fertilizer is suitable for irrigation facilities such as drip irrigation facilities and sprinkling irrigation facilities; urea phosphate is used as a main acidic substance, so that the pH value of the product can be lower than 3.5 after the product is dissolved in water, and the effect of adjusting hard water is achieved; the raw material proportion is optimized, a certain amount of ammonium sulfate and powdery industrial monoammonium phosphate are used, meanwhile, the urea proportion is controlled, the use mode of ammonium bicarbonate after drying is matched, the system moisture is reduced, system dry-wet control is stabilized, the problem of screening deliquescence caused by system material acidity in the product production process is solved, and large-scale productivity is formed.

This invention discloses a method for improving the yield of urea phosphate in the preparation of wet-process phosphoric acid. The method involves mixing a crystallizer with wet-process phosphoric acid and urea, reacting the mixture, and then cooling, crystallizing, filtering, and drying to obtain urea phosphate. Alternatively, wet-process phosphoric acid is mixed with urea and reacted. After the reaction, a crystallizer or a urea phosphate mother liquor containing the crystallizer is added, followed by cooling, crystallizing, filtering, and drying to obtain urea phosphate. The crystallizer is one or a mixture of two or more of ethylene glycol methyl ether, ethylenediaminetetraacetic acid, and citric acid in any proportion. The urea phosphate produced by this method is in crystalline form, meeting the industrial urea phosphate standard (GB / T27805-2011), satisfying market demand, and featuring a low-cost crystallizer with flexible addition methods, making it very convenient for practical production.

The present invention provides a method and device for preparing industrial zinc phosphate and iron phosphate using zinc-containing waste hydrochloric acid, and belongs to the field of waste acid treatment and resource utilization. In order to realize the resource utilization of zinc-containing waste hydrochloric acid in the hot-dip galvanizing industry, the method of the present invention adopts a method for pretreating zinc-containing waste hydrochloric acid so that its heavy metals and organic matter reach the set standards, and then obtains high-value-added industrial zinc phosphate and iron phosphate for batteries through chemical oxidation, precipitation, evaporation, filtration and other methods on the basis of effectively treating zinc-containing waste hydrochloric acid, which has good environmental benefits, economic benefits and application prospects. The chemical reagents added by the method of the present invention are low in cost, the resin used for adsorption can be reused, the process operation is simple, the overall cost is low, and it is conducive to promotion and use.

The application discloses a kind of high-efficiency precipitation treatment process and system of iron phosphate mother liquor wastewater, belong to battery raw material grade phosphorus acid iron sewage treatment field, including the following steps: mother liquor and ammonia water are injected into primary mixing pool; pH is adjusted to 6.5~6.8 by mechanical stirring reaction; sludge of flocculation tank and primary sedimentation tank backflow carries out flocculation reaction 30min;Into primary sedimentation tank, the best rising velocity of mother liquor is 0.4m / h~0.6m / h;Part of mother liquor is discharged from effluent area, another part of mother liquor is discharged from bottom sludge concentration area, reduce the sludge amount of primary plate-frame filter press, shorten plate-frame filter press feeding time, bottom concentrated sludge is continuously discharged by sludge backflow pump and primary sludge discharge pump;Part of sludge backflows to flocculation tank, another part of sludge enters primary plate-frame filter press and is dewatered;Backflow sludge and flocculation can be fully mixed to form larger flocculation, and the solid content of sludge is higher after larger flocculation enters primary plate-frame filter press and is filtered again;Primary plate-frame filtrate flows into secondary mixing pool.

The invention discloses a method for producing disodium hydrogen phosphate dodecahydrate from industrial monoammonium phosphate mother liquor, which comprises the following steps of: A, reacting the industrial monoammonium phosphate mother liquor and monocalcium phosphate in a primary reactor to obtain reaction slurry; b, the reaction slurry is subjected to filter pressing for solid-liquid separation, ammonium phosphate clear liquid is obtained, and a filter cake is used for producing powdery ammonium phosphate; c, slowly adding solid sodium hydroxide into the ammonium phosphate clear liquid to obtain disodium hydrogen phosphate slurry; and D, carrying out filter pressing on the reaction slurry to obtain a disodium hydrogen phosphate clear solution, and carrying out concentration, water replenishing crystallization, centrifugation and drying to obtain a disodium hydrogen phosphate dodecahydrate finished product and a mother solution. According to the method, the purity of the obtained disodium hydrogen phosphate dodecahydrate is 97% or above, and the defects in the prior art are overcome.

The invention discloses phosphorus-based acid source catalyzed high-flame-retardant ultraviolet-resistant aerogel powder and a preparation method of the phosphorus-based acid source catalyzed high-flame-retardant ultraviolet-resistant aerogel powder. The preparation method comprises the following steps: S1, adding TiO2 powder into ethanol; adding nitric acid to adjust the pH value; amino alkyl triethoxy silane is added, and stirring is carried out; after heating reaction, washing and vacuum drying are performed to obtain modified TiO2; s2, tetraethyl orthosilicate, absolute ethyl alcohol and deionized water are mixed, a phosphorus acid source is dropwise added while stirring is conducted, and water bath hydrolysis is conducted after dropwise adding is completed; s3, adding modified TiO2 into the solution obtained in S2, stirring, and dropwise adding ammonia water to induce the system to generate gelation reaction; s4, adding absolute ethyl alcohol and normal hexane after gelling, and carrying out solvent exchange; s5, adding a mixed solution of a hydrophobic modifier and n-hexane for surface modification to obtain a wet gel composite material; s6, drying to obtain the flame-retardant hydrophobic silicon dioxide / modified TiO2 aerogel composite material. The fireproof and anti-ultraviolet performance of the HSA composite material disclosed by the invention is remarkably improved.

A coating composition includes: (a) a phosphorus acid functional polyol polymer having an acid value within a range of greater than 7 mg KOH / g and 33 mg KOH / g or less, and a hydroxyl value within a range of from 60 to 200 mg KOH / g; (b) an aminoplast derived crosslinker reactive with the phosphorus acid functional polyol polymer; and (c) a non-aqueous liquid medium. Further, if an external catalyst is present, the coating composition comprises less than 0.25 weight % of the external catalyst based on the total weight of the coating composition. The coating composition cures at a temperature of 100° C. or less.

The invention discloses a method for producing industrial diammonium hydrogen phosphate from crude phosphoric acid, and belongs to the technical field of production of industrial diammonium hydrogen phosphate. The method solves the problem that the industrial-grade diammonium hydrogen phosphate product cannot be directly prepared by using crude phosphoric acid and ammonia gas as main raw materials. The method comprises the following steps: S1, mixing crude phosphoric acid and ammonia gas, and neutralizing for the first time, wherein the neutralization degree of the first time is 1.50-1.60; s2, filtering the material liquid obtained after the first time of neutralization; s3, concentrating the filtered material liquid, adding ammonia gas into the concentrated material liquid, and neutralizing for the second time with the neutralization degree of 1.95-2.0; and S4, cooling and crystallizing the material liquid obtained after the secondary neutralization to obtain an industrial-grade diammonium hydrogen phosphate product. The industrial-grade diammonium hydrogen phosphate product is produced by adopting a two-step neutralization method, so that the purpose of ammoniation impurity removal is achieved, heat release of ammoniation neutralization reaction is facilitated, the use of steam is reduced, the existing process is shortened, and the cost is reduced.

The application discloses a preparation method of isopropylated triphenyl phosphate with low phosphorus acid triphenyl ester content, which comprises the following steps: firstly, isopropyl phenol, phenol, phosphorus oxychloride and a catalyst are put into a reactor, and isopropylated triphenyl phosphate crude product is obtained after reaction; secondly, the isopropylated triphenyl phosphate crude product is subjected to vacuum distillation, and the vacuum distillation is stopped when the acid value of the isopropylated triphenyl phosphate crude product is less than or equal to 3 mgKOH / g; finally, the isopropylated triphenyl phosphate crude product after vacuum distillation is subjected to molecular distillation treatment, and isopropylated triphenyl phosphate product is obtained. The preparation method is a physical purification process, has mild conditions and simple operation, does not introduce new impurities, and does not produce a large amount of 'three wastes', so that the problem of a large amount of phosphorus acid ester organic wastewater caused by alkali washing water washing in a traditional process can be effectively avoided, and environmental pollution in the production process is greatly reduced.

An aqueous dispersion of a polymer additive having a weight average molecular weight of from 2,000 to 25,000 g / mol and comprising, by weight based on the weight of the polymer additive, (i) from 20% to 85% of structural units of an ethylenically unsaturated siloxane monomer; (ii) from 0.1% to 10% of structural units of an ethylenically unsaturated functional monomer carrying at least one functional group selected from an amide, ureido, carboxyl, carboxylic anhydride, hydroxyl, phosphorus acid, or sulfonic acid group, a salt thereof, or mixtures thereof; and (iii) from 5% to 79.9% of structural units of an additional ethylenically unsaturated nonionic monomer. The aqueous dispersion has a coagulum content less than 2,000 ppm after filtration through a 44 micron sieve. A coating composition comprises the aqueous dispersion of the polymer additive can provide coatings with anti-corrosion and / or stain removal properties.

The application discloses a microbial preparation for saline-alkali soil improvement and a preparation method and application thereof, and relates to the technical field of soil improvement, and specifically discloses a microbial preparation for saline-alkali soil improvement, which comprises Bacillus marinus with a preservation number of CGMCC No.28096, Bacillus cereus with a preservation number of CGMCC No.29355, Bacillus subtilis with a preservation number of CICC 25064 and Pseudomonas with a preservation number of CICC 22131, and the ratio of the viable bacterial counts of the Bacillus marinus, the Bacillus cereus, the Bacillus subtilis and the Pseudomonas is (3-5):(1-3):(5-7):(1-3). The microbial preparation can effectively reduce the alkalinity and sodium adsorption ratio of the saline-alkali soil, effectively degrade phosphorus acid tris(2-chloropropyl) ester pollutants, and improve the quality of the saline-alkali soil.

The present invention is a composition comprising a) an aqueous dispersion of polymer particles optionally functionalized with a phosphorus acid monomer and having a z-average particle size as measured using dynamic light scattering in the range of from 50 nm to 500 nm; b) a salt of iodic acid; c) a C8-C10-alkyl phosphate or sulfate; with the proviso that when the polymer particles are not functionalized with the phosphorus acid monomer, the composition further comprises d) a hydrotrope. The composition of the present invention provides a way of preserving a latex against microbial growth in the absence of a biocide.

The utility model relates to the technical field of phosphoric acid dissolution and recycling, and provides a phosphoric acid dissolution and recycling device based on Fenton process sludge treatment, which comprises a reaction box and a recycling box, the reaction box is internally divided into a reaction storage chamber and a waste phosphoric acid storage chamber, the lower end of the reaction box is provided with a reaction box output joint, and the recycling box is provided with a waste phosphoric acid output joint. The top end of the recycling box is fixedly connected with a recycling pump, the output end of the recycling pump is fixedly connected with a recycling input pipe through a connecting pipe, the top end of the recycling box is fixedly connected with the recycling input pipe, and multiple sets of heat pipes are arranged in the recycling box. According to the utility model, ferric oxide and industrial phosphoric acid which are generated in the earlier stage treatment of the Fenton process sludge are used as raw materials to produce ferric phosphate, so that the sludge generated in the Fenton reaction can be effectively utilized to prepare ferric phosphate, the function of recycling metal elements in the Fenton reaction sludge is realized, the reutilization of resources can be realized, and the waste of the resources is reduced.

1. The name of the design product: phosphoric acid potential titrator. 2. The use of the design product: phosphoric acid potential titrator. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to a coke ore pellet for industrial yellow phosphorus production and a preparation method of the coke ore pellet. The preparation method comprises the following steps: S1, respectively crushing and screening coke powder and ground phosphate rock; s2, fully stirring and mixing the screened coke powder and ground phosphate rock with industrial phosphoric acid to obtain an intermediate mixed material; s3, uniformly adding industrial water into the intermediate mixed material obtained in the S2 through a spraying device, starting stirring at the same time, and uniformly stirring to obtain a final mixed material; and S4, the final mixed material obtained in the S3 is pressed into coke ore pellets through a double-roller press, and then the coke ore pellets are put into a plate type dryer to be dried and shaped. According to the preparation method of the coke ore pellets, the coke powder and the ground phosphate rock serve as raw materials, the industrial phosphoric acid serves as the binding agent and the activating agent, the prepared coke ore pellets are low in cost, high in compressive strength in a high-temperature area and high in pelletizing rate and can serve as a raw material for producing industrial yellow phosphorus, and cost reduction and efficiency improvement of yellow phosphorus production are achieved.

The invention discloses a method for promoting acidolysis of iron oxide red in phosphoric acid. The method comprises the following steps: 1) adding iron oxide red into a phosphoric acid solution at normal temperature; then adding reduced iron powder, and fully stirring; 2) carrying out continuous stirring reaction under a heating condition; and 3) filtering the reacted solution system to obtain the acidolysis solution of the iron oxide red. According to the method, iron oxide red and diluted industrial phosphoric acid are taken as main raw materials, a small amount of reduced iron powder is added under the conditions of normal temperature and relatively low H3PO4 concentration, and a heating and stirring reaction is performed, so that acidolysis of iron oxide red in phosphoric acid is effectively promoted, and the content of impurity metal ions in acidolysis liquid is reduced; the application of the obtained acidolysis solution in the fields of preparation of battery-grade iron phosphate products and the like is facilitated; and the related technological process is simple, the equipment requirement and energy consumption are low, the production cost can be effectively reduced, and the method is suitable for large-scale production.

The application discloses a phosphorus acid triphenyl ester fluorescent quantitative rapid detection method and products and application thereof, and relates to a phosphorus acid triphenyl ester hapten, an artificial antigen, a monoclonal antibody and a preparation method thereof, and a phosphorus acid triphenyl ester fluorescent quantitative rapid detection test strip. The test strip comprises a sample pad, a label pad, a reaction membrane and a water absorption pad which are sequentially connected and fixed on a PVC bottom plate. The label pad is coated with an anti-phosphorus acid triphenyl ester monoclonal antibody which is labeled with a detectable label. The reaction membrane is provided with a T line and a C line. The T line is coated with a phosphorus acid triphenyl ester artificial antigen, and the C line is coated with a sheep anti-phosphorus acid triphenyl ester antibody. The test strip is combined with the detection method in the application, and has the advantages of high specificity, high sensitivity, short detection time, low cost, low skill requirement for an operator and the like under the premise of ensuring detection accuracy, and the detection limit reaches 0.1 ug / kg. The test strip is suitable for rapid detection of a large number of samples on site and has a good application prospect.

This invention relates to the field of phosphorus chemical technology and discloses a method for preparing monoammonium phosphate (MAP) using phosphorus and fluorine wastewater residue and residual phosphoric acid raffinate. The method involves mixing and reacting phosphorus and fluorine wastewater residue, residual phosphoric acid raffinate, and sodium sulfate, controlling the ratio of F / Mg to be greater than 4 and the ratio of Na / Mg to be greater than 3 in the reaction system. The reaction produces dilute phosphoric acid and phosphogypsum. After solid-liquid separation, the filtrate is dilute phosphoric acid. Ammonia is added to the dilute phosphoric acid for neutralization, followed by filtration. The resulting filtrate is then concentrated through at least one evaporation and cooling crystallization to obtain the MAP product. This invention uses residual raffinate to prepare MAP, with phosphorus and fluorine wastewater residue as a desulfurizing agent. The calcium source in the residue can be used as a desulfurizing agent, the phosphorus source can produce phosphoric acid, and fluorine acts as a co-precipitant to remove magnesium. This avoids the need to add additional fluorine-containing reagents in industrial MAP production, resulting in a simpler process and lower cost.

The invention discloses a phosphate binder modified by tetrasodium iminodisuccinate and a preparation method thereof. The phosphate binder modified by tetrasodium iminodisuccinate is prepared from the following raw materials: 52.100% to 52.587% of industrial phosphoric acid, 11.946% to 12.058% of aluminum hydroxide powder, 1.850% to 1.867% of boric acid, 0.617% to 0.622% of silicate, 1.233% to 1.245% of light magnesium oxide, 0.039% of copper oxide, 0.467% to 1.387% of tetrasodium iminodisuccinate, and 30.828% to 31.115% of water. The invention adopts tetrasodium iminodisuccinate as a modifier, and the prepared modified phosphate binder has the advantages of low viscosity, high bonding strength, good sand sample anti-hygroscopicity, and good fluidity of the prepared molding sand.

The invention relates to the technical field of wastewater treatment, in particular to an electric flocculation system coupled with a solid electrolyte and a deep phosphorus removal method of phosphorus-containing wastewater, and the electric flocculation system coupled with the solid electrolyte comprises an anode and a cathode coupled with an adsorbent type solid electrolyte layer; and the adsorbent type solid electrolyte layer is anion exchange resin with phosphorus adsorption capacity. The solid electrolyte electric flocculation system is applied to phosphorus-containing wastewater with low phosphate radical concentration, and the advantages and characteristics of the adsorbent type solid electrolyte and the electric flocculation system are fully exerted, so that phosphate radical enrichment can be realized, and the removal rate of phosphate radicals is increased; moreover, for the problem of high energy consumption of a common electric flocculation system caused by low conductivity of low-concentration phosphorus-containing wastewater, the solid electrolyte electric flocculation system disclosed by the invention enhances ion conduction by introducing the adsorbent type solid electrolyte layer, so that the energy consumption of the system is greatly reduced.

The utility model provides a simple and efficient phosphorite feeding device, and relates to the technical field of industrial phosphoric acid manufacturing. The simple and efficient phosphorite feeding device comprises a stock bin, a plate feeder, a storage tank, a lifting device, a small ore pulp tank, a large ore pulp tank and an ore pulp pump, the stock bin is arranged above the plate type feeder; the plate feeder is provided with a protective shell, the upper portion of the protective shell communicates with the output end of the stock bin, and one end of the plate feeder extends out of the protective shell and is located above the storage pool. The lifting device comprises a lifting bin, a motor, a chain and a plurality of hoppers; the upper and lower ends of the lifting bin are respectively provided with pivots, the lower part of the lifting bin is provided with a feed port, and the upper part of the lifting bin is provided with a discharge port; the small ore pulp tank is arranged below the discharge hole; the large pulp tank is connected with the small pulp tank; the pulp pump is connected with the large pulp tank. The simple and efficient phosphorite feeding device solves the technical problems that according to an existing phosphorite feeding mode, the process is tedious, the number of material leakage points is large, and the inspection range of operators is wide.

The present application relates to the technical field of lithium ion battery cathode material, in particular to a kind of phosphorus acid iron production wastewater treatment method.The present application includes the following steps:S1.pH is adjusted to 10.6-11.5 by adding zirconium industry waste lye to phosphorus acid iron production wastewater, after reaction, solid-liquid separation is carried out, and the precipitate is removed, to obtain solution A;S2.carbonate is added to solution A, after reaction, solid-liquid separation is carried out, and the precipitate is removed, to obtain solution B;S3.solution B is reused to crude phosphoric acid for producing phosphorus acid iron;And / or, solution B is treated by membrane.The present application uses zirconium industry waste lye for the pretreatment of phosphorus acid iron production wastewater, not only can reduce the pretreatment cost, and the phosphorus acid root retention rate in pretreated wastewater is relatively high, can be directly reused to crude phosphoric acid, reduce phosphorus loss;While effectively reducing the hardness of phosphorus acid iron, when carrying out the later stage membrane treatment, it can significantly reduce the risk of fouling and membrane blocking.

The invention discloses a production process of a fully water-soluble powdered potassium dihydrogen phosphate, and belongs to the technical field of phosphorus chemical process. The invention uses relatively low-priced industrial monoammonium phosphate as a raw material, first reacts with potassium hydroxide, and subsequently adjusts the pH to 4.2-4.9 after controlling the ammonia content by ammonia evaporation, adds a complexing agent, clarifies the solution, and spray-dries the powdered potassium dihydrogen phosphate obtained within this pH range. The product purity reaches more than 98%, reaches the standard of fertilizer-grade superior products, and the product is fully water-soluble. The invention has a simple process and is easy to operate, and the market price of the powdered potassium dihydrogen phosphate is higher than that of crystalline potassium dihydrogen phosphate, with high profits and good market prospects.

The present invention is a composition comprising an aqueous dispersion of a) polymer particles functionalized with structural units of a phosphorus acid monomer; b) one or more inorganic extenders; and c) polyorganosiloxane resin particles having a D50 particle size in the range of from 1 μm to 10 μm, and a number average molecular weight in the range of from 100,000 to 1,000,000 Daltons. The composition of the present invention is useful in a matte paint formulation that forms a coating with a balance of desirable coefficient of friction, mar resistance, and scratch resistance properties.

The present invention is a composition comprising a) an aqueous dispersion of polymer particles optionally functionalized with structural units of a phosphorus acid monomer and having a z-average particle size as measured using dynamic light scattering in the range of from 50 nm to 500 nm; b) a C4-C10-alkyl hydroperoxide; c) a C8-C10-alkyl phosphate or sulfate; with the proviso that when the polymer particles are not functionalized with structural units of the phosphorus acid monomer, the composition further comprises d) a hydrotrope. The composition of the present invention provides a biocide-free latex with relatively low concentrations of a hydroperoxide.

The present invention is a composition comprising a waterborne dispersion of a) polymer particles functionalized with structural units of a phosphorus acid monomer; b) an orthophosphate n-butyl ester block additive. The composition of the present invention is useful in a paint formulation to provide block resistance and high tint strength.

The present invention relates to a process for preparing an aqueous dispersion of multiphase occluded polymer particles comprising the steps of a) contacting, under emulsion polymerization conditions, first monomers and a chain transfer agent to form an aqueous dispersion of first polymer particles having a Tg in the range of from −30° C. to 30° C.; then b) contacting the aqueous dispersion of first polymer particles with a second monomer under emulsion polymerization conditions to form an aqueous dispersion of second polymer particles occluded within the first polymer particles, wherein the first monomers a phosphorus acid monomer or a salt thereof; and the second monomer comprises at least 90 weight percent methyl methacrylate. The aqueous dispersion of occluded polymer particles arising from the process of the present invention is useful in a formulation that can be used to prepare a water-resistant blister free LASD coating.

The marine degradable polyester resin composition of the invention is a resin composition mainly containing polyester, and contains a phosphorus acid ester-based degradation accelerator, in which the phosphorus acid ester-based degradation accelerator is a compound represented by Chemical Formula (I) described below. Further, it is preferable that the phosphorus acid ester-based degradation accelerator is dialkyl pentaerythritol diphosphite, the polyester resin composition is aliphatic polyester, or the polyester resin composition is poly-L-lactic acid or poly-D-lactic acid with an optical purity of 90% or more. In addition, the polyester-based resin molded product of the invention contains the marine degradable polyester resin composition described above.

The invention discloses a phosphoric acid tri (1, 3-dichloro isopropyl) ester degrading flora and application of the phosphoric acid tri (1, 3-dichloro isopropyl) ester degrading flora. Belongs to the technical field of biological treatment of environmental organic pollutants. The flora is mixed bacteria and is named as QYTD-1, and the invention aims to provide the phosphoric acid tri (1, 3-dichloroisopropyl) ester degrading flora which is high in environmental adaptability, relatively low in cost and relatively good in degrading effect and application of the phosphoric acid tri (1, 3-dichloroisopropyl) ester degrading flora. The catalyst is used for degrading tris (1, 3-dichloro isopropyl) phosphate.