14 results about "Phosphoric anhydride" patented technology

The invention discloses a flame-retardant epoxy resin pouring sealant as well as a preparation method and application thereof. The flame-retardant epoxy resin pouring sealant comprises a component A and a component B, the component A comprises the following components in parts by weight: 35-60 parts of epoxy resin; 15 to 30 parts of a toughening agent; 3-10 parts of a diluent; 0.2 to 0.5 part of a coupling agent; 10-15 parts of a heat-conducting filler A; the component B comprises the following components in parts by weight: 75-90 parts of a component curing agent; 1-3 parts of an accelerant; 15-20 parts of a heat-conducting filler B; the component A and the component B are mixed according to the mass ratio of 100: (30-50). The components of the epoxy resin pouring sealant are optimized, and the self-made phosphorus-containing anhydride curing agent and a double-phase synergistic toughening system are particularly adopted, so that the high-flame-retardant epoxy resin pouring sealant which has the characteristic of low density and is resistant to high and low temperature circulation is realized.

The application discloses a talcum powder reinforced PC / ABS alloy material and a preparation method thereof. The raw materials of the composition mainly comprise polycarbonate resin (PC), acrylonitrile-styrene-diene copolymer (ABS), talcum powder and phosphoric anhydride compounds. The phosphoric anhydride compounds are prepared by the reaction of diphenyl phosphine oxide and itaconic anhydride. The obtained talcum powder reinforced PC / ABS alloy material has excellent appearance and high impact, high modulus and high heat resistance.

The present application discloses a secondary battery, a method for preparing the secondary battery, a battery module, a battery pack and an electric device. The secondary battery includes an electrolyte and a positive electrode sheet, wherein the positive electrode sheet includes a molecular formula of Li a Ni b Co c M1 d M2 e O f A g The layered material, M1, M2, A, a, b, c, d, e, f, and g are respectively as defined herein, the electrolyte includes a compound containing a phosphorus-oxygen double bond, and the compound containing a phosphorus-oxygen double bond includes one or more of lithium difluorophosphate, diethyl (2-cyanoethyl) phosphonate, tripropyl phosphoric anhydride, diethyl acetyl phosphate, and triphenyl phosphate. Based on the total mass of the electrolyte, the mass percentage of the compound containing a phosphorus-oxygen double bond is x% and 0<x≤1.0, and the secondary battery satisfies c+x / 10≥0.10. The present application can increase the lithium ion diffusion rate of low-cobalt or cobalt-free positive electrode active materials and improve the cycle performance of secondary batteries.

The utility model belongs to the technical field of butyl phosphoric anhydride preparation, and particularly relates to an anti-corrosion container for butyl phosphoric anhydride preparation, which comprises a U-shaped frame, two rotating assemblies are arranged on the U-shaped frame, each rotating assembly is provided with a connecting plate, one side of each connecting plate is provided with a semicircular cylinder, and the other side of each connecting plate is provided with an anti-corrosion layer. The two semicircular cylinders form a container body for bearing liquid, a semicircular anti-corrosion layer matched with the semicircular cylinder is arranged on the inner wall of each semicircular cylinder in a magnetic attraction mode, and the two semicircular anti-corrosion layers form a circular anti-corrosion layer for sealing an inner cavity of the container body. According to the device, the detachable anti-corrosion layer and the separable container body structure are adopted, when the anti-corrosion layer is damaged, only the local anti-corrosion layer needs to be replaced, and the maintenance cost is greatly reduced. In addition, the separable structure facilitates cleaning and maintenance in the container, the service life of the container is prolonged, and the use efficiency of the container is improved.

Disclosed are a nitrogen-containing compound and a preparation method therefor. Specifically, disclosed is a method for preparing a compound III, comprising the following steps: in the presence of a phosphoric acid anhydride-type condensing agent and an organic base, a compound II undergoing a condensation reaction with 2-aminoacetonitrile in an organic solvent, to obtain compound III. The preparation method for compound III disclosed in the present invention has one or more of the following advantages: good yield, low cost, low impurity residue, convenient post-processing, and suitability for industrial production.

The invention relates to the technical field of compound fertilizers, and discloses a macromolecular slow-release and surface anti-sticking synergistic compound fertilizer which comprises the following raw materials in percentage by weight: 15-16% of nitrogen, 10-12% of water-soluble phosphoric anhydride, 14-15% of water-soluble potassium, 20-25% of bentonite, 5-15% of wollastonite, 0.5-3% of trace elements, 3-8% of a coating material, 2-5% of a conditioner, 0.5-1% of calcium stearate, 1-2% of kaolin and 3-5% of medium elements. According to the macromolecular slow-release and surface anti-sticking synergistic compound fertilizer and the preparation method thereof, by adjusting the proportion of nitrogen, phosphorus and potassium in the fertilizer, the fertilizer can meet the differential requirements of different crops for nutrients in the growth stage, and by compounding calcium stearate and kaolin, the anti-sticking performance of the surfaces of fertilizer particles can be effectively improved; the outer-layer CS-PVA blended film is used for synergistic interaction and intelligent slow release; the thickness of the film layer and the crosslinking degree are used for regulating and controlling the nutrient release period, so that the fertilizer requirement rule of crops is matched, and the fertilizer application frequency is effectively reduced.

The invention provides a method for synthesizing alpha-bromo-gamma-butyrolactone, which comprises the following step: by using 1-propyl phosphoric anhydride or 1-butyl phosphoric anhydride as a catalyst, reacting a substrate gamma-butyrolactone with a bromination reagent to obtain the alpha-bromo-gamma-butyrolactone. According to the method, the used raw material gamma-butyrolactone is cheap and easy to obtain, the route is short, the operation is convenient, the finally obtained by-products are few and easy to treat and purify, and the product with higher purity can be obtained without rectification.

The present invention belongs to the technical field of the preparation of polyamides, and particularly relates to a method for preparing a flame-retardant graphene polyamide 6 composite material. In the present invention, graphene, small molecule polyamide, 2-phenyl-1,3-propanediol phosphoric anhydride, ethylenediamine, oxalic acid and caprolactam are mixed, and an auxiliary agent and a solvent are added, and ring-opening and polymerization reactions are carried out, and at the same time, a substitution reaction between 2-phenyl-1,3-propanediol phosphoric anhydride and ethylenediamine is carried out to obtain the flame-retardant graphene polyamide 6 composite material. A flame retardant is generated by the reaction of 2-phenyl-1,3-propanediol phosphoric anhydride and ethylenediamine, and the flame retardant is generated while polymerization is carried out, which improves the dispersion of the flame retardant in the polyamide 6 material. At the same time, 2-phenyl-1,3-propanediol phosphoric anhydride can also participate in the polymerization reaction as a capping agent, so that the compatibility between the flame retardant and the polymer matrix is better, the stability of the flame retardant in polyamide 6 is improved, the situation of flame retardant migration is reduced, and the strength performance of the composite material is improved.

The invention provides a synthesis method of 1-propyl phosphoric anhydride, which comprises the following steps: (a) adding an organic solvent, n-propyl alcohol and triethylamine into a reaction container, cooling to 0 DEG C or less, dropwise adding an organic solvent containing phosphorus trichloride, heating to 20-35 DEG C after dropwise adding, reacting, and filtering, concentrating and distilling to obtain a first intermediate; (b) carrying out reflux reaction on the first intermediate, 1-bromopropane and a catalyst to the end point; recovering unreacted 1-bromopropane under negative pressure, adding water for layering, and discarding a water phase to obtain a second intermediate; (c) co-heating the second intermediate and a hydrochloric acid solution to perform a reflux reaction; after the reaction is finished, carrying out negative pressure distillation, washing to remove residual hydrochloric acid, and concentrating to obtain a third intermediate; and (d) reacting the third intermediate with acetic anhydride in an inert atmosphere, carrying out negative pressure distillation to remove by-product acid, and ending the distillation when no distillate exists. 1-propyl phosphoric anhydride with high yield and high purity is obtained, and the reaction process is economical and environment-friendly.

An amide-containing aromatic diamine has the following structural formula: where Ar is a group with an aromatic ring structure. The preparation method includes the following steps: (1) mixing and reacting components including aromatic diamine, p-nitrobenzoic acid, alkyl phosphoric anhydride and polar aprotic organic solvent; (2) adding carboxylic acid and halogen-free quaternary ammonium salt to the product obtained in step (1) to obtain a mixed solution, which is placed in the cathode cell of an H-type electrolytic cell; the anode cell and the cathode cell are separated by a Nafion membrane; adding the same polar aprotic organic solvent and halogen-free organic electrolyte as the cathode cell to the anode cell of the H-type electrolytic cell, and adding a metal ion-free reducing agent; and conducting the reaction by electrolysis; (3) purifying the cathode reaction solution obtained in step (2) by post-treatment to obtain the amide-containing aromatic diamine. The yield, purity and whiteness of the amide-containing aromatic diamine are higher.

The invention discloses a gel solid-state battery. The battery comprises a positive electrode, a negative electrode, a diaphragm and electrolyte. Two times of liquid injection are adopted in the battery preparation process, and the electrolyte comprises a primary liquid injection electrolyte and a secondary liquid injection electrolyte; the primary injection electrolyte comprises a lithium salt, an organic solvent, a fluorophosphoric anhydride additive and a functional additive. According to the invention, the fluorophosphoric anhydride additive is used as Lewis base and can catalyze the polymerization of gel monomers, and no gas is generated. And the residual fluorophosphoric anhydride forms a large amount of inorganic compound components such as LiF in the interface film of the positive electrode and the negative electrode of the battery, so that the electrochemical and thermodynamic stability of the interface protection film SEI / CEI is improved, and the electrical performance and the safety performance of the battery are enhanced at the same time. In addition, the fluorophosphoric anhydride further enhances the crosslinking degree of the gel polymer and improves the binding force to the electrolyte, so that the vapor pressure and the reaction activity of the electrolyte are further reduced, the valve opening time of the battery cell is prolonged, the hazard level of thermal runaway of the battery is reduced, and the thermal safety performance of the battery is improved.

The present invention discloses a flame-retardant composite color-spun yarn and a preparation method thereof. Polyamic acid is formed by reacting 3,3',4,4'-biphenyltetracarboxylic dianhydride, p-phenylenediamine and a modified monomer, and then blended with a functional filler to obtain a spinning solution. The spinning solution is spun and imidized under high-temperature conditions to obtain reinforced fibers. The reinforced fibers are dyed to obtain dyed fibers. The dyed fibers are subjected to processes such as opening, carding, drawing, roving and spinning to obtain a pretreated yarn. The pretreated yarn is soaked in a ferric chloride solution, taken out and dried to obtain a color-spun yarn. When the color-spun yarn burns, the internal organic phosphorus can generate phosphoric anhydride and phosphide. The phosphoric anhydride can dehydrate and carbonize the color-spun yarn, forming a carbonized layer on the surface to isolate the external heat. At the same time, doping with silicon, nitrogen and boron elements further improves the compactness of the carbon layer and can release nitrogen and nitrogen dioxide gases, thereby reducing the oxygen content and enhancing the flame-retardant effect.

The application belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of a tucatinib intermediate. The compound N-hydroxy-N'-[4-(2-methyl-4-nitrophenoxy)pyridin-2-yl]formamidine is used as a starting material, condensed with a compound 1-n-propyl phosphonic anhydride to prepare 7-(2-methyl-4-nitrophenoxy)-[1,2,4]triazolo[1,5-a]pyridine. The 1-n-propyl phosphonic anhydride is a low-toxicity, stable and easy-to-operate reagent. The by-product after reaction is a water-soluble phosphoric acid substance, so that the purity of the related product is also high, the operation is safe and environmentally friendly, and the method is suitable for industrial production.

A water-soluble fertilizer-pesticide containing metalaxyl-M and ipconazole and its preparation method. The active ingredients of the water-soluble fertilizer-pesticide are metalaxyl-M and ipconazole, and the carrier is selected from one or more of macronutrient fertilizers, micronutrient fertilizers, and trace element fertilizers; the carrier can also be amino acids, humic acids, etc.; the dosage form is a soluble powder; β-cyclodextrin is used as an inclusion material to prepare an inclusion complex of metalaxyl-M and ipconazole, so as to improve the solubility of metalaxyl-M and ipconazole in water and have better drug efficacy; the inclusion complex material contains citric acid phosphoric anhydride, and citric acid phosphoric anhydride can promote the absorption and conduction of the drug, and can achieve the effect of carrying the pesticide with the fertilizer and the pesticide promoting the fertilizer efficiency; the water-soluble fertilizer-pesticide can be sprayed on the leaves or used in the soil, with a wide range of applications and is easy to promote and apply.