77 results about "Phosphorous acid" patented technology

The application provides a preparation method of a rare earth metal adsorption and separation resin and a resin extraction column. The preparation method comprises the following steps: adding an oil phase composed of styrene, divinylbenzene, a pore former and an initiator into an aqueous phase containing a dispersant and an inorganic salt to perform suspension polymerization, so as to obtain a white ball resin; performing phthalimide and hydrolysis on the white ball resin, so as to obtain a primary amine resin; performing reaction on the primary amine resin with chloroacetic acid and an alkaline medium, so as to perform carboxymethylation on part of the primary amine sites; and performing reaction on the obtained intermediate resin with phosphorous acid, formaldehyde and an acidic medium, so as to perform phosphonic acid methylation on the remaining part of the primary amine sites. The white ball resin is first subjected to amination, and then part of the carboxymethylation and part of the phosphonic acid methylation are sequentially performed, so that the carboxyl type chelation sites and the phosphonic acid type chelation sites are simultaneously reserved in the same resin bead, thereby being beneficial to improving the comprehensive adsorption performance and separation performance of the resin on the rare earth metal.

A method for recycling catalytic metals comprising: collecting a plurality of spent catalytic metals, wherein the spent catalytic metals contain cathodes of NMC111, NMC622, NMC811, NCA, LCoO2, LiNi0.5Mn1.5O4, LiMnO4, LiNiO2, LiMn2O4, and / or LiMnO2 compositions; subjecting the plurality of spent catalytic metals to a green mixture, wherein the green mixture includes dihydrogen phosphite and water, phosphoric acid and water, sulfuric acid and water, hydrogen chloride and water, or nitric acid and water, at temperatures of between 80 and 120° C. to form a metal leachate solution; and recovering lithium (Li) from the metal leachate solution.

The invention relates to an additive composition comprising primary anti-oxidants and a secondary anti-oxidant, wherein the primary anti-oxidants are a phenyl phosphite and 3,3′-thiodipropionic acid dioctadecylester, and wherein the secondary anti-oxidant is epoxidized soybean oil. The invention additionally relates a bituminous composition comprising primary anti-oxidants and a secondary anti-oxidant, wherein the primary anti-oxidants are a phenyl phosphite and 3,3′-thiodipropionic acid dioctadecylester; and wherein the secondary anti-oxidant is epoxidized soybean oil. The invention also relates to an asphalt composition comprising the bituminous composition with resistance to short-term and long-term chemical ageing. The invention further relates to the use of an additive composition to reduce short-term and long-term chemical ageing of a bituminous composition.

The present application belongs to the technical field of cable material, and particularly relates to a resin composition, a cable insulation material, a cable and a preparation method. The resin composition comprises polyethylene, a crosslinking agent and a crosslinking aid. The crosslinking agent is selected from one or more of triallyl isocyanurate, trimethylolpropane trimethacrylate and trimethylolpropane triacrylate. The crosslinking aid is selected from one or more of triphenyl phosphite, dipropylene glycol diacrylate and tetraethylene glycol diacrylate. The cable insulation material made of the resin composition has a high irradiation crosslinking rate, which can significantly improve the irradiation processing speed of the subsequent cable and improve the cable output efficiency. In addition, the cable insulation material has good aging resistance, can meet the long service life requirement, saves the cable update cost and has good economic benefits.

The invention discloses a preparation method and application of a triazole phosphate type corrosion and scale inhibitor, and relates to the technical field of industrial water treatment chemicals. The compound is prepared by a three-step synthesis method which comprises the following steps: firstly, preparing an amino methylene phosphonic acid compound with one-NH reaction site from n ethylene (n + 1) amine, phosphorous acid and formaldehyde; secondly, preparing a triazole derivative from ethylene glycol glycidyl ether and triazole; and reacting the two products with sodium bicarbonate to obtain a target product. The target molecule contains a sodium phosphate group and a triazole group at the same time, through the synergistic effect of functional groups, intramolecular synergy of scale inhibition and corrosion inhibition functions is achieved, and the corrosion inhibition performance higher than that of a DETPMP scale and corrosion inhibitor used commercially is shown. The triazole phosphate type corrosion and scale inhibitor has good catalytic activity on photocatalytic carbon dioxide reduction under the conditions of room temperature and high temperature, the TON (carbon monoxide conversion number) can reach 1206, and the selectivity is 100%.

The application discloses a preparation method of multifunctional composite nanometer hollow spheres, which comprises the following steps: dissolving iron cyanide in water to form solution A; dissolving cobalt salt, silver salt and sodium citrate in water to form solution B; adding solution B into solution A and stirring for 10-30 min, and then aging for 24-48 h to obtain a precursor; and heat-treating the prepared precursor in a tubular furnace under N2 atmosphere at 600-900 DEG C for 2-5 h, and the heating rate is 1-3 DEG C / min, and then continuing phosphorization treatment for 1-5 h at 300-400 DEG C by taking sodium hypophosphite as a phosphorus source to obtain multifunctional composite nanometer hollow sphere catalysts. The preparation method is simple and easy to operate, the prepared composite catalyst is composed of multiple components, has multifunctionality, and shows excellent catalytic activity on electrocatalytic hydrogen evolution, oxygen evolution and oxygen reduction reaction in an alkaline medium, and shows a good application prospect in electrocatalytic water decomposition and zinc-air batteries.

The application discloses a method for dehalogenation reduction of electron-rich aryl halide. The aryl halide is used as raw material, and is heated to react in the presence of phosphorous acid, iodine and a solvent, so that the corresponding aromatic hydrocarbon compound is prepared. The method directly avoids the defects of the current mainstream method, i.e. the need of using expensive transition metal catalyst and equivalent metal reagent. The electron-rich aryl halide is reduced to the corresponding aromatic hydrocarbon by one step through using the cheap, low-toxic and stable phosphorous acid as a reducing agent and iodine as a catalyst. The method has the advantages of no need of metal participation, simple operation, low cost, green environmental protection and the like, avoids the use of metal reagent and the limitation of special equipment which is not easy to be enlarged for production. After the reaction of the phosphorous acid is completed, the by-product is generally phosphoric acid and the corresponding phosphorus salt, which can be quickly removed through water washing, and the post-treatment is simple, so that the industrialized production is facilitated.

The present application relates to a kind of low sulfur high performance fuel oil production device, it relates to fuel oil production technical field.Low sulfur modified residual oil, hydrogenation low sulfur raffinate are used as main raw material, auxiliary agent A, auxiliary agent B prepared by special oil device are matched, reaction conditions are accurately controlled through DCS system, low sulfur high performance marine fuel oil is prepared in low temperature mild environment;Device integrates vacuum deep pull and viscosity reduction cracking combined process, light fraction can be deep-processed into three kinds of base oil, etc.Additional value products, heavy fraction is reduced in viscosity by viscosity reduction cracking, and low-temperature fluidity is improved;Auxiliary agent B is prepared by dithiophosphoric acid, molybdenum trioxide, epoxy succinic acid polymer, 2,6-naphthalene dicarboxylic acid, anhydrous toluene, phosphorous acid;Fuel oil prepared by the present application, sulfur content is lower, environmental protection is better, low-temperature fluidity is improved, and combustion efficiency is better.

This invention discloses a temperature-controlled sustained-release amino acid chitosan drug carrier, its preparation method, and its application, belonging to the field of biomedical materials technology. The preparation method includes the following steps: dissolving chitosan in a first organic acid solution to obtain a chitosan solution; adding butanetetracarboxylic acid and sodium hypophosphite to the chitosan solution, adjusting the solution to a set pH value, and reacting to obtain a reaction solution; precipitating the reaction solution with ethanol, then filtering, washing with deionized water until neutral, and vacuum drying to obtain modified chitosan; dispersing the modified chitosan in deionized water, adding amino acids, adjusting the pH to acidic, adding a crosslinking agent, and stirring the reaction at room temperature to obtain a crosslinking reaction solution; sequentially dialyzing and freeze-drying the crosslinking reaction solution to obtain a complex; mixing the complex with water to prepare an aqueous solution, pouring it into a polytetrafluoroethylene mold for room temperature drying to form a nascent film; immersing the nascent film in a second organic acid solution, then sequentially rinsing with deionized water overnight, and air-drying at room temperature to obtain the temperature-controlled sustained-release amino acid chitosan drug carrier. This is used to solve technical problems such as poor mechanical properties of chitosan and uncontrollable load release mechanism.

The application relates to the technical field of veterinary drugs, and particularly discloses aureomycin soluble powder and a preparation method thereof. The aureomycin soluble powder is composed of the following components in mass percentage: aureomycin phosphate salt 20-55%, chelating agent 0.5-2.5%, penetration promoter 0.5-2.5%, and organic acid carrier in residual amount; the aureomycin phosphate salt is mainly obtained by chemically modifying hydrochloric acid aureomycin with chlorophosphite di-tert-butyl ester, and then reacting with an alkali to form a salt. According to the application, the aureomycin is chemically modified into a phosphate salt, and the chelating agent and the penetration promoter are used in cooperation, so that the key problems of poor water solubility and low absorption rate are fundamentally solved, the solubility is improved by an order of magnitude, the oral bioavailability is significantly improved, and meanwhile, the complicated super-micro pulverization treatment required by a traditional process is avoided.

The application provides a reaction device and method for continuously synthesizing trimethyl phosphite, and belongs to the technical field of trimethyl phosphite synthesis. The reaction device comprises a raw material tank group, a composite reaction kettle, a solvent tank, a pre-cooler, a water washing kettle, an alkali liquid buffer tank, a layered system and a rectification system. The raw material tank group comprises a methanol tank and a phosphorus trichloride tank. The raw material tank group and the solvent tank are connected with the composite reaction kettle through pipelines via the pre-cooler, and the composite reaction kettle is connected with the water washing kettle through a pipeline. The phosphorus trichloride drop-like feed is efficiently converted into a uniform liquid film by a centrifugal disc, and then the liquid film is converted into a fine jet flow by a spraying ring. The fine jet flow is instantaneously and highly intensively sheared with a strong vortex-shaped methanol / solvent flow formed through a tangential feeding pipe. The secondary intensified mixing mode replaces the macroscopic mixing limitation of a traditional stirred tank, realizes instant and uniform mixing of materials at a micro level, thereby inhibiting a side reaction and effectively improving a reaction rate.

The present invention discloses a high-heat and high-shear-resistant high-flame-retardant halogen-free flame-retardant compound system and use thereof in a glass fiber reinforced material. The flame-retardant compound system comprises the following components in weight percentages: 40%-99.9% of aluminum diethylphosphinate, 0.1%-50% of a poly / mono-phosphorous acid-condensed diphosphite salt and / or a condensed diphosphite salt, 0-40% of inorganic aluminum phosphite, and 0-10% of a zinc-containing thermally stable compound, wherein the poly / mono-phosphorous acid-condensed diphosphite salt and the condensed diphosphite salt has a structural formula shown in a formula (I):wherein, x is an integer of 0-6, n, y, and p are integers of 1-4, and M is Ca, Mg, Al, Zn, Fe, Sn or Ti.

This invention relates to the field of fine chemical catalysis technology, specifically to an improved ion-gel confined palladium-on-carbon catalyst, its preparation method, and its applications. The catalyst uses N,N-dimethylacetamide (DMAc) as a solvent and potassium acetate as a base, with the addition of a catalytic amount of antioxidant 168 [(tris(2,4-di-tert-butylphenyl) phosphite)], and the reaction is carried out under milder CO pressure (1.0-1.6 MPa) and temperature (90-110 °C). This improved catalyst, in synergy with the optimized process, unexpectedly enables the high conversion and selectivity of 4-bromobenzyl sulfone derivatives to 4-methylsulfonylbenzoic acid derivatives, while maintaining the catalyst's excellent recyclability and stability. This invention provides a highly efficient, green, and easily industrialized synthetic route for the target product.

A method for recycling catalytic metals comprising: collecting a plurality of spent catalytic metals, wherein the spent catalytic metals contain cathodes of NMC111, NMC622, NMC811, NCA, LCoO2, LiNiO.5Mnl.5O4, LiMnO4, LiNiO2, LiMn2O4, and / or LiMnO2 compositions; subjecting the plurality of spent catalytic metals to a green mixture, wherein the green mixture includes dihydrogen phosphite and water, phosphoric acid and water, sulfuric acid and water, hydrogen chloride and water, or nitric acid and water, at temperatures of between 80 and 120°C to form a metal leachate solution; and recovering lithium (Li) from the metal leachate solution.

This invention discloses a molybdenum phosphide quantum dot-embedded polyaniline-derived hollow sphere hard carbon composite material and its preparation method. The preparation method includes the following steps: (1) preparing polyaniline hollow spheres using aniline, hydrogen peroxide, anhydrous ferric chloride, and phosphoric acid aqueous solution as raw materials via a hydrothermal method; (2) immersing the polyaniline hollow spheres in concentrated hydrochloric acid, drying them, and then performing a secondary hydrothermal treatment with ammonium molybdate tetrahydrate and ammonium dihydrogen phosphate to obtain a precursor; (3) further carbonizing and phosphating the precursor with sodium hypophosphite monohydrate to obtain the molybdenum phosphide quantum dot-embedded polyaniline-derived hollow sphere hard carbon composite material. In this composite material, molybdenum phosphide is embedded in the hard carbon wall of polyaniline hollow spheres with a diameter of 200-300 nm in the form of 2-3 nm quantum dots, accounting for approximately 20-25 wt% by mass. The composite material provided by this invention can be used as an electrode material, and the potassium-ion batteries prepared from it have high specific capacity, good cycle stability, and excellent rate performance. Furthermore, the method provided by this invention has the advantages of simple process, low cost, and large-scale production capability.

This invention relates to the field of chemical technology and discloses a method for purifying organic phosphites. The method comprises: mixing the organic phosphite to be purified with organic solvent II and organic solvent III, followed by solid-liquid separation. The organic phosphite exhibits a higher solubility in organic solvent II at 25°C than in organic solvent III by 10-50 g / 100 mL. Using this method, the content of impurities such as phosphorous acid and chlorine in the organic phosphite molecule can be reduced to below 20 ppm, and the purity can be increased to over 99% (HPLC determination), meeting the requirements for industrial applications.

The utility model discloses a constant temperature device of phosphorous acid turnover tank, including constant temperature tank, the inner wall fixed support board of constant temperature tank, a plurality of heating rods are fixed with equidistance at the bottom of support board, the bottom fixed limiting rod of heating rod, the outer wall of limiting rod is sleeved and has the cleaning spare between every cleaning spare all fixed with connecting rod, and the inner side fixed screw block of edge support rod, the inside screw thread connection of screw block has screw rod, the bottom fixed rotating block of screw rod, and the top of screw rod is provided with driving piece. The design of cleaning spare can realize the automatic cleaning of the phosphorous acid impurity attached to the surface of heating rod. When needing cleaning, motor drives screw rod to rotate, and screw block moves on screw rod, thereby driving cleaning spare to move upwards along limiting rod, and cleaning strip is in close contact with heating rod, and scrapes off the impurity on the surface of heating rod in the moving process.

The utility model relates to the field of chemical separation technology discloses an on -line separation equipment of impurity for triethyl phosphite production, including support, the support upper surface fixedly connected with the reaction kettle, the inside of reaction kettle is provided with the filter assembly, the filter assembly includes filter plate, the filter plate sets up in the inside of reaction kettle, the reaction kettle outer wall fixedly connected with the clamp no.

This invention discloses an antibacterial air filter material and its preparation method, relating to the field of filter material technology. In preparing the antibacterial air filter material, terephthalaldehyde is reacted sequentially with 2-aminobenzimidazole and diethyl phosphite to obtain a phosphorus-nitrogen composite flame retardant; silica is reacted sequentially with γ-glycidyl etheroxypropyltrimethoxysilane and 1-hydroxymethyl-5,5-dimethylhydantoin to obtain modified silica; the modified silica is chlorinated with sodium hypochlorite to obtain haloaminated silica; 70-80 parts of polyacrylonitrile, 5-6 parts of the phosphorus-nitrogen composite flame retardant, and 3-4 parts of haloaminated silica are formulated into a spinning solution, and electrospinned to obtain a polyacrylonitrile fiber membrane; the polyacrylonitrile fiber membrane is reacted sequentially with ethylenediamine and curcumin to obtain the antibacterial air filter material. The antibacterial air filter material prepared by this invention has the advantages of both antibacterial and flame retardant properties.

This invention belongs to the field of inorganic nanoparticle technology, and discloses a silicon-phosphorus-containing inorganic nanoparticle, its preparation method, and its application. The silicon-phosphorus-containing inorganic nanoparticle is prepared from inorganic nanoparticles, a phosphorus-containing compound, and a silane coupling agent. The inorganic nanoparticles are selected from at least one of nano-ZrO2, nano-CaCO3, nano-SiO2, and nano-TiO2. The phosphorus-containing compound is selected from at least one of dimethyl phosphite, diethyl phosphite, and diphenyl phosphite. The silane coupling agent is selected from γ-glycidoxypropyltrimethoxysilane and / or γ-glycidoxypropyltriethoxysilane. The silicon-phosphorus-containing inorganic nanoparticles of this invention, due to surface modification, have significant steric hindrance, are not prone to aggregation, and can be well dispersed in a matrix. The inorganic nanoparticles contain silicon and phosphorus, and have a certain flame-retardant effect.

This invention provides a method for recovering silver from waste silver plating solution, belonging to the field of heavy metal industrial wastewater treatment technology. The invention involves adding sodium hypophosphite to waste silver plating solution containing complexed silver. After the sodium hypophosphite dissolves, the pH of the system is adjusted to alkaline. A reduction reaction is then carried out under heating conditions to generate elemental silver particles. This invention utilizes the in-situ generation of hydrogen free radicals from sodium hypophosphite under alkaline heating conditions to achieve direct reduction and complex breaking of stable silver nicotinic acid complexes and elemental silver conversion. This process is completed in one step, simplifying the traditional complex multi-step process of "oxidation-complex breaking-ion release-chemical precipitation" into a single reduction step, significantly shortening the treatment process and improving the reaction rate and treatment efficiency.

The present invention provides a lubricating oil composition that is used for the lubrication of a shock absorber and contains: a base oil (A); one or more basic compounds (B) selected from an amide compound (B1) and an imide compound (B2); and a phosphorous acid ester (C) having an alkenyl group or an alkyl group having 11 or more carbon atoms, wherein the content of the component (C) is 0.01 to 1.90 mass% in terms of the total content of the lubricating oil composition, and the base value of the lubricating oil composition is 0.05 to 1.30 mg KOH / g.

The application discloses a kind of multi-stage distillation filtration methods and systems of diphenyl monoisodecyl phosphite production, it is related to diphenyl monoisodecyl phosphite production and processing technical field, including the following steps: the ester exchange reaction after the crude product containing diphenyl monoisodecyl phosphite is carried out first thin film evaporation and is light, and the light component in the crude product after ester exchange reaction is separated out;The crude ester product after light removal is carried out secondary vacuum rectification treatment, and high-purity diphenyl monoisodecyl phosphite fraction is obtained;High-purity diphenyl monoisodecyl phosphite fraction is carried out third filtration purification treatment, and final product is obtained;By establishing the whole process integrated mathematical model covering thin film evaporation, vacuum rectification and filtration, system can real-time perception feed fluctuation, and each level process parameter is dynamically adjusted in advance, ensure that impurities are removed accurately and efficiently, effectively eliminate the product quality batch fluctuation caused by parameter fixed or adjustment lag under traditional mode.

The application provides a synthesis method of high-hygroscopic-dispersing-dye easy-to-dye functional polyester, which comprises the following steps: step one, esterification one-pot; step two, esterification two-pot; step three, final polymerization pot (polycondensation); and step four, discharging and slicing. The polyester is prepared by a continuous polymerization or an intermittent polymerization mode, p-terephthalic acid, ethylene glycol and ethylene glycol antimony are added in the esterification one-pot, polyethylene glycol, nano montmorillonite, cobalt acetate, stabilizer Irganox1010 and triphenyl phosphite are added in the esterification two-pot; the low-temperature coloring and the hygroscopic property of the polyester are realized by adding the polyethylene glycol, the easy-to-dye and the hygroscopic property of the polyester are realized by adding the nano montmorillonite, the ethylene glycol antimony is added as a catalyst, the polymerization reaction and the stability of the polyester are realized by adding the cobalt acetate, the stabilizer Irganox1010 and the triphenyl phosphite, and finally the easy-to-dye and the hygroscopic effect of the polyester are realized.

This invention relates to the field of pesticides, specifically to a fungicide composition for foliar spraying, its preparation method, and application scheme. The active ingredients of the fungicide composition include quinoline copper and phosphite A. Phosphite A is selected from at least one of phosphorous acid, alkali metal salts or alkaline earth metal salts of phosphorous acid, alkylphosphonic acids containing C1-C6 groups of phosphorous acid or alkali metal salts of alkylphosphonic acids, alkaline earth metal salts, and aluminum salts. In the fungicide composition, the weight ratio of quinoline copper to phosphite A is 99:1 to 1:99. The fungicide composition of this invention has high activity against bacterial and fungal diseases occurring in various crops, such as canker and downy mildew, and also exhibits significant synergistic effects. It not only improves the antibacterial or bacteriostatic effect but also broadens the control spectrum. Simultaneously, it can reduce the number of applications and alleviate environmental pressure, thereby achieving the effect of prevention-oriented and integrated pest management.