19 results about "Pyrophosphate sodium" patented technology

The application discloses a combined depressor for recovering scheelite from ultra-low-grade tungsten-molybdenum associated ore and a method, the combined depressor comprising sodium humate, sodium mercaptoacetate, ammonium citrate, sodium pyrophosphate, sodium fluosilicate and lead nitrate, and the six kinds of substances are configured into the combined depressor in a proportion of 1:1:(2-5):(1-5):(1-3):(2-5). The application aims at recovering scheelite from low-grade refractory ore, improves the separation effect of scheelite and gangue minerals, improves the scheelite recovery rate and the concentrate grade, and improves the economic benefit.

This invention discloses a cultivation method for increasing the starch content of duckweed, relating to the field of plant culture technology, comprising the following steps: taking pig farm biogas slurry, adjusting ammonia nitrogen to 10 mg / L~20 mg / L, total phosphorus to 0.1 mg / L~2.0 mg / L, and pH to 5.0~6.0, then inoculating initial duckweed into it and culturing for 5~7 days to obtain acclimatized duckweed; taking pig farm biogas slurry, adjusting ammonia nitrogen to 40~50 mg / L, total phosphorus to 0.4 mg / L~5.0 mg / L, and pH to 5.0~6.0, then adding sodium pyrophosphate and Bacillus amyloliquefaciens, then inoculating the acclimatized duckweed into it and culturing for 2~3 days to obtain high-starch duckweed. This invention constructs a two-step cultivation system of acclimatization and stress through culture solutions with differentiated nitrogen and phosphorus concentrations, and with the synergistic effect of sodium pyrophosphate and Bacillus amyloliquefaciens, achieves efficient and stable accumulation of duckweed starch.

This invention belongs to the field of sodium-ion battery cathode materials, specifically disclosing a method for preparing a sodium iron pyrophosphate / C composite material. The method involves pre-reacting iron source A and iron source B to obtain a composite iron source, then adding sodium, phosphorus, and carbon sources for mechanical mixing, followed by solvent removal to obtain precursor powder. The precursor powder is then subjected to high-temperature calcination to obtain the sodium iron pyrophosphate / C composite material. This invention also includes the material prepared by the described method and its applications. The material prepared by this method exhibits excellent fast-charging performance and long-cycle stability.

The application relates to a silicon-fluorine electrolyte waste gas treatment agent and a preparation method and an electrolyte waste gas treatment method, and belongs to the technical field of electrolyte waste gas treatment materials, and comprises 25-35 parts of a composite amine component, 35-45 parts of a functional alcohol ether component, 5-8 parts of a synergistic promoter, 2-4 parts of a stabilizer and 15-25 parts of deionized water, wherein the composite amine component is a mixture of N-methyldiethanolamine, N-(2-hydroxyethyl)ethylenediamine and triethanolamine, the functional alcohol ether component is a mixture of polyethylene glycol dimethyl ether and diethylene glycol butyl ether, the synergistic promoter is a mixture of beta-cyclodextrin and lauryl betaine, and the stabilizer is a mixture of sodium pyrophosphate and disodium ethylenediaminetetraacetate. The silicon-fluorine electrolyte waste gas treatment agent prepared by the application has high treatment efficiency and regeneration capacity.

The present application relates to the technical field of material preparation, and discloses a porous biological carbon material, a preparation method thereof and an application thereof. The preparation method of the porous biological carbon material comprises the following steps: adding starch, sodium pyrophosphate and phytic acid into water to obtain a paste solution; adding sodium chloride into the paste solution, freezing, and then drying under the conditions of a vacuum degree of 0.005-0.01 MPa and a temperature of-50 to-45 DEG C to obtain a porous biological carbon material precursor; performing first roasting on the porous biological carbon material precursor at a temperature of 280-320 DEG C, washing with water, and drying; and then performing second roasting at a temperature of 650-700 DEG C to obtain the porous biological carbon material. The preparation method of the porous biological carbon material is optimized, starch is used as a carbon source, sodium pyrophosphate and phytic acid are used for synergistic crosslinking, sodium chloride is used for freezing and pore induction, and two-step gradient roasting is performed, so that the adsorption capacity of the porous biological carbon material for carbon dioxide and the cyclic stability of the porous biological carbon material are significantly improved.

The application discloses a method for preparing a composite sodium iron phosphate positive electrode material based on a biomass grinding aid. The method comprises the following steps: stirring a yam with water to obtain yam homogenate, and filtering the yam homogenate to obtain filtrate; weighing sodium pyrophosphate, ferrous oxalate, iron phosphate and sodium carbonate according to stoichiometric ratios, adding water, a carbon source and the filtrate, and stirring uniformly to obtain a mixed slurry; grinding the mixed slurry, and performing spray drying to obtain a composite sodium iron phosphate precursor powder; and calcining and crushing the composite sodium iron phosphate precursor powder to obtain a composite sodium iron phosphate positive electrode material. The yam biomass colloid is used as the grinding aid, and the yam biomass colloid has a wide source, low cost and biodegradability, can reduce particle agglomeration and improve grinding efficiency, and can improve the electrochemical performance and cycle capacity retention rate of the finished product; the process is compatible with existing equipment and is easy to industrialize.

The application discloses a method for preparing a low-porosity pyrophosphate sodium ferric phosphate material by a self-sacrificial template method and the material, and comprises the following steps: S1, precursor mixing: mixing and grinding an iron source, a sodium source, a phosphoric acid source, a carbon source and a self-sacrificial template agent to obtain a uniform precursor slurry; S2, precursor drying: drying the precursor slurry to obtain a dried precursor powder; S3, first-stage heat treatment: under a protective atmosphere, the precursor powder is heated to a first temperature T1 and kept warm to form an intermediate body with a uniform porous structure; S4, second-stage heat treatment: under a negative pressure protective atmosphere, the intermediate body is heated to a second temperature T2 higher than the first temperature T1 and kept warm, and is naturally cooled to room temperature to obtain the low-porosity pyrophosphate sodium ferric phosphate material. The method for preparing the low-porosity pyrophosphate sodium ferric phosphate material by the self-sacrificial template method has the characteristics of low porosity, comprehensive performance and simple and efficient preparation process.

The application discloses modified limestone powder and a preparation method and application thereof, and belongs to the technical field of building materials. The application provides a preparation method of modified limestone powder, and the preparation method comprises the following steps: mixing and grinding limestone raw materials and grinding aids. The grinding aids comprise sodium pyrophosphate, sodium gluconate, sodium citrate, an alcohol amine compound and water. According to the preparation method, the particle size of the obtained modified limestone powder can be effectively reduced, the sphericity of the modified limestone powder can be improved, and the content of free calcium ions in the modified limestone powder can be reduced. The application further provides the modified limestone powder prepared by the above preparation method and application of the obtained modified limestone powder.

This invention relates to the field of mineral-based solid waste resource recycling, specifically to a solid waste-based homogeneous slurry and its preparation method. Using mineral-based solid waste as the core raw material, supplemented with water, grinding aids, and potential regulators, a stable solid waste-based homogeneous slurry is prepared through a complete process including raw material pretreatment, coarse grinding, fine grinding, graded closed-loop screening, precise Zeta potential control, and ultrasonic homogenization. This slurry can be used with composite solidifying agents to prepare solidified soil for engineering applications. This invention establishes a precise matching mechanism between the calcium content of solid waste and the potential regulator. Potassium hexapolymetaphosphate is preferred for high-calcium mineral-based solid waste, while sodium pyrophosphate is preferred for low-calcium mineral-based solid waste. It is suitable for all types of high-calcium and low-calcium bulk mineral-based solid waste. The prepared slurry exhibits excellent homogeneity and can be stored for a long time. The solidified products have high mechanical strength and low performance dispersion. The preparation process parameters are controllable and suitable for large-scale continuous production, showing broad application prospects.

This invention relates to a high-density Na a Fe b (PO4) c A method for preparing P2O7 / C materials, wherein the material is carbon-coated Na. a Fe b (PO4) c P2O7; its preparation method includes the following steps: weighing sodium pyrophosphate, iron oxide red, iron phosphate, carbon source and dispersant according to stoichiometric ratio; adding iron oxide red, iron phosphate, carbon source and dispersant to water, mixing evenly and grinding to a particle size D50≤300nm to obtain a first slurry; adding the sodium pyrophosphate to the first slurry, mixing evenly to obtain a second slurry; drying the second slurry to obtain a precursor; pre-sintering the precursor under a protective gas atmosphere, and then sintering at a higher temperature to obtain Na. a Fe b (PO4) c P2O7 / C material. The method of this invention can effectively improve Na... a Fe b (PO4) c The compaction density of P2O7 / C material improves the electrochemical performance of electrochemical energy storage devices.

The present application relates to the technical field of animal feed processing, and discloses a kind of supplementary feed for feeding small ducklings, comprising the following raw material components by weight: rice bran, wheat bran, corn protein enzymatic peptide powder, zinc sulfate heptahydrate, manganese sulfate monohydrate, ferrous sulfate heptahydrate, copper sulfate pentahydrate, citric acid, sodium pyrophosphate, trehalose, malt dextrin, sorbitol, betaine, phytase preparation, silicon dioxide. By dissolving trehalose, malt dextrin, sorbitol and phytase preparation in water to prepare phytase protection solution, and adding the phytase protection solution to the treated granules under vacuum conditions, while setting up low-temperature drying treatment, the phytase is loaded into the granule matrix after avoiding the high-temperature stage of granulation, thereby reducing the risk of phytase inactivation during granulation and subsequent processing, and improving the problem of low phosphorus release efficiency caused by phytase inactivation at high temperature.

The application provides a high-compaction-density sodium iron pyrophosphate positive electrode material and a preparation method thereof, and belongs to the field of sodium ion batteries. The preparation method of the high-compaction-density sodium iron pyrophosphate positive electrode material comprises the following steps: preparing amorphous FePO4xH2O, wherein 1≤x≤4; mixing the amorphous FePO4xH2O with a phosphorus source, a supplementary sodium source, a carbon source and a solvent to obtain a first slurry; performing dispersion and drying treatment on the first slurry to obtain a precursor; and performing sintering treatment on the precursor to obtain the sodium iron pyrophosphate positive electrode material. The method provided by the application can fuse primary particles into secondary particles with a high compactness, and the compaction density of the sodium iron pyrophosphate positive electrode material prepared by the method can reach 2.0-2.2 g / cm 3 , effectively solving the technical problem of low compaction density of the sodium iron pyrophosphate positive electrode material, and making the sodium ion battery prepared from the positive electrode material have a high energy density.

This invention provides a glycosylated peptide chelated iron pyrophosphate supplement, its preparation method, and its application. The raw materials for preparing the glycosylated peptide chelated iron pyrophosphate supplement include glycosylated peptides, iron pyrophosphate, and a solubilizer. The glycosylated peptide is a β-glucan-grafted casein phosphopeptide, and the solubilizer is sodium pyrophosphate. The glycosylated peptide chelated iron pyrophosphate supplement of this invention exhibits good water solubility, color stability over a wide pH range, coexistence with nutrients such as vitamin C and oils, high iron loading capacity, good stability in gastric juice, sustained iron release in simulated intestinal fluid, and high iron absorption and utilization rate, significantly improving anemia in iron-deficiency anemia mice. The excellent absorption performance and superior physicochemical properties of the glycosylated peptide chelated iron pyrophosphate supplement of this invention make it a potential candidate for widespread application in the iron supplement market.

The present application relates to the production of pyrophosphate sodium, and discloses a method for producing high-gas-speed pyrophosphate sodium, comprising the following steps: neutralization, spray drying, polymerization, acid spraying and cooling, crushing, screening and packaging, to obtain high-gas-speed pyrophosphate sodium. The method comprises the following steps: neutralizing food phosphoric acid and alkali to obtain sodium phosphate slurry, controlling the specific gravity to 1.4-1.6 and pH to 4.0-4.3; conveying the neutralized slurry to a spray drying tower for drying, controlling the tower bottom temperature to 145-160 DEG C; drying the powder and then putting it into a dynamic polymerization furnace for polymerization, to form ordinary-gas-speed pyrophosphate sodium. The powder is put into a cooling roller from the polymerization furnace tail, and a phosphoric acid solution is sprayed at the roller inlet, and then the pyrophosphate sodium is cooled, crushed and screened, to obtain high-gas-speed pyrophosphate sodium. The gas speed of the obtained pyrophosphate sodium is 38-42.

The application discloses a process for recovering acrylonitrile from acrylic fiber production wastewater, and belongs to the technical field of wastewater treatment containing acrylic acid. Most of the existing wastewater treatment processes containing acrylic acid mostly adopt strong alkali treatment or biological strain treatment, and have the defects of complex process, high cost and waste of recyclable monomers. The application comprises the following steps: 1) adding a pH buffer into acrylic fiber production wastewater to adjust the pH to 6-10, and continuously stirring for 2-4 hours; 2) heating the obtained material to 60-70 DEG C, and making the material enter a flash tower from the bottom of the flash tower to obtain acrylonitrile through flash separation; wherein the pH buffer is a mixture of one or more of sodium carbonate, sodium bicarbonate and sodium pyrophosphate in any proportion. After the acrylic fiber production wastewater is adjusted to a specific pH by using a specific pH buffer, acrylonitrile can be recovered through flash, the obtained acrylonitrile has high purity, high yield and low energy consumption, and the method is simple.

This invention provides a method and kit for extracting microbial DNA from marine sediments. The extraction method includes: a) washing the marine sediments with a washing buffer to obtain a washed sample; wherein the washing buffer includes spermidine and sodium pyrophosphate; b) lysing the microbial cells in the washed sample to obtain a lysed sample; c) recovering, screening, and purifying the DNA from the lysed sample to obtain microbial DNA. This method solves the problem of poor DNA extraction efficiency in existing technologies and is applicable to the field of DNA extraction.

The invention discloses a method for co-producing high-purity sodium fluoride and ammonium chloride through fluorosilicic acid ammonolysis, and belongs to the technical field of fluorine chemical industry. Firstly, fluosilicic acid reacts with ammonia water to prepare an ammonium fluoride solution; secondly, sodium chloride and a sodium pyrophosphate inhibitor are added into the solution, and sodium fluoride coarse crystals and first mother liquor are obtained through programmed temperature control crystallization; then, carrying out two-stage negative pressure gradient concentration on the first mother liquor, deeply recovering sodium fluoride and crystallizing ammonium chloride; then, carrying out gradient purification on the sodium fluoride coarse crystal by absolute ethyl alcohol to obtain a high-purity product; finally, the ammonium chloride wet material is granulated into a superior chemical fertilizer through a fluidized bed, through the innovative crystallization and purification technology, the total yield of sodium fluoride is stabilized at 96.5% or above, the product purity breaks through 99.8%, meanwhile, high-value utilization of the by-product ammonium chloride is achieved, and economic and environment-friendly benefits are remarkable.

This invention provides a sodium acetate trihydrate-based composite phase change material for battery thermal management, its preparation method, and its applications. The composite phase change material specifically comprises: potassium chloride, urea, polyethylene glycol, tetrasodium pyrophosphate decahydrate, expanded graphite, and sodium acetate trihydrate. This invention achieves phase change temperature suitable for lithium battery thermal management through the synergistic regulation of phase change temperature by urea and potassium chloride; reduces supercooling by tetrasodium pyrophosphate decahydrate; inhibits phase separation by polyethylene glycol; and improves thermal conductivity and shape stability by utilizing expanded graphite. The material achieves a thermal conductivity of 1.42 W / (m•K), significantly reduces supercooling, and maintains good stability after 50 melt-solidification cycles. This material can be used for passive thermal management of 46950 cylindrical lithium-ion batteries, effectively reducing battery temperature rise under 1C-3C discharge conditions. Therefore, the composite phase change material of this invention has the characteristics of low supercooling, resolution of severe phase separation, low phase change temperature, and good thermal conductivity.

The application discloses an orange reactive dye and a preparation method thereof, and belongs to the fine chemical field. The orange reactive dye is prepared by using m-phenylenediamine as a coupling component, and sequentially coupling two kinds of diazonium salts through a first coupling reaction, a second coupling reaction and a third coupling reaction. An additive M composed of sodium pyrophosphate, sodium hydrogen pyrophosphate, sodium hydrogen phosphate, sodium gluconate, an anionic surfactant and sodium carbonate is added in the diazotization stage, so that the material dispersibility and the reaction conversion rate are obviously improved, and the diazotization conversion rate can reach 98.7 % in one hour. The dye has bright orange color, the maximum absorption wavelength is red-shifted, the color is deeper, the color fixing rate and the build-up are better than those of a commercially available reactive orange 6R, and the light fastness, washing fastness, wet rubbing fastness and heat pressing fastness are obviously improved. The single-color use has good level dyeing property, and the compounding can improve the blackness. The preparation process is free of refining and wastewater and residue discharge, the product can be directly dried, is green, environment-friendly and low in cost, is suitable for dyeing and printing of cellulose fibers, protein fibers and synthetic fibers, and has ecological safety and industrial application value.