112 results about "Hypophosphorous acid" patented technology

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a prismatic aluminum hypophosphite compound as well as a preparation method and application thereof. The prismatic aluminum hypophosphite compound is prepared from aluminum hypophosphite, layered montmorillonite and nano silicon dioxide, and the weight percentage of the layered montmorillonite is 0.043 to 0.087 weight percent and the weight percentage of the nano silicon dioxide is 0.0036 to 0.0181 weight percent based on 100 weight percent of the aluminum hypophosphite; the particle size D10 of the prismatic aluminum hypophosphite compound is 1-3 microns, the particle size D50 of the prismatic aluminum hypophosphite compound is 5-8 microns, the particle size D90 of the prismatic aluminum hypophosphite compound is 10-15 microns, the particle size D97 of the prismatic aluminum hypophosphite compound is smaller than 20 microns, and the prismatic aluminum hypophosphite compound is of a single prismatic crystal structure or a regular structure in which a plurality of prismatic crystals are mutually embedded. The prismatic aluminum hypophosphite compound provided by the invention has a specific morphology and is especially suitable for a polyurethane flame-retardant system.

The invention discloses a halogen-free compound flame retardant and application thereof in an antistatic nylon 66 composite material, and belongs to the technical field of polymer composite materials. The halogen-free compound flame retardant is prepared by compounding 68 parts of an organic aluminum hypophosphite flame retardant, 20 parts of a nitrogen-phosphorus intumescent flame retardant, 10 parts of a two-dimensional layered inorganic substance and 2 parts of a coupling agent through a high-speed mixing and drying process. The halogen-free compound flame retardant is blended with nylon 66, reinforced fibers, an antioxidant and the like, and the composite material is prepared through melt extrusion. According to the compound system, the total dosage of the flame retardant is remarkably reduced, the V-0 flame retardant grade is still achieved under the condition that the thickness is 0.8 mm, and the limit oxygen index exceeds 32%. The composite material has excellent flame retardancy and antistatic property while maintaining good mechanical properties, is suitable for a high glass fiber content system, effectively solves the problems of high flame retardant addition amount, difficult processing, high cost and the like in the prior art, and has the advantages of simple process and excellent comprehensive performance.

The invention relates to the technical field of coatings, and discloses a modified epoxy heat-resistant flame-retardant coating and a preparation method thereof.The preparation method comprises the steps that flame-retardant modified halloysite nanotubes, deionized water, epoxy resin, boron phenolic resin, a defoaming agent and a flatting agent are mixed to be uniform and discharged, and the modified epoxy heat-resistant flame-retardant coating is obtained. Diethyl hypophosphorous acid ethylene oxide methyl ester and boric acid modified halloysite nanotubes react to obtain flame-retardant modified halloysite nanotubes, and the halloysite nanotubes and the organic flame retardant diethyl hypophosphorous acid ethylene oxide methyl ester have a synergistic effect, so that agglomeration of the halloysite nanotubes is avoided, migration of a small-molecule organic flame retardant is avoided, and the flame retardance of the halloysite nanotubes is improved. The boron phenolic resin, the flame-retardant modified halloysite nanotubes and the epoxy resin form a three-dimensional cross-linked thermosetting network structure, so that the hardness, wear resistance and impact resistance of the coating can be improved, and the obtained coating has excellent flame retardance and heat resistance.

The invention relates to a double-coordination passivated red-light perovskite quantum dot and a preparation method and application thereof. The preparation method comprises the following steps: preparing a monovalent cation precursor from cesium carbonate, 1-octadecene and oleic acid; preparing a lead source precursor from lead halide, zinc halide, 1-octadecene, diisooctyl hypophosphorous acid and oleylamine; thermally injecting the monovalent cation precursor into the lead source precursor, and cooling to prepare a perovskite quantum dot solution; performing anti-solvent purification on the perovskite quantum dot solution to obtain red light perovskite quantum dots; a process of preparing a double-coordination passivated red light perovskite quantum dot from the red light perovskite quantum dot and taurosulfonamide hydrochloride; the invention also discloses an application of the double-coordination passivated red light perovskite quantum dot prepared by the preparation method in preparation of an electroluminescent diode. The post-treatment passivation operation method is simple and convenient, and the quantum dot treated by the double-coordination ligand achieves the purpose of preparing the halide perovskite quantum dot with excellent optical performance and excellent performance of the prepared electroluminescent diode.

The invention discloses a nitrogen-phosphorus intumescent flame retardant based on a hypophosphorous acid derivative and oligomerization Schiff base as well as a preparation method and application thereof, and relates to the technical field of macromolecular flame-retardant materials. The invention discloses a nitrogen-phosphorus intumescent flame retardant based on a hypophosphorous acid derivative and oligomeric Schiff base. The nitrogen-phosphorus intumescent flame retardant has a structure as shown in a general formula (I), wherein the Schiff base chain segment is an oligomerization Schiff base chain segment formed by condensation of aromatic polyamine and aromatic polyaldehyde and has a linear or hyperbranched structure, m, n and x are positive integers larger than 0, m + n is larger than or equal to 2 and smaller than or equal to 8, and x is larger than or equal to 2 and smaller than or equal to 30. According to the flame retardant provided by the invention, an oligomer structure and an introduced benzene ring structure have good compatibility with a polymer matrix and are not easy to migrate and separate out, so that long-acting flame retardance and mechanical properties of a material can be maintained, expensive DOPO is successfully replaced by hypophosphorous acid which is low in cost and easy to obtain, and a solid foundation is laid for large-scale industrial popularization and application.

This invention discloses a method for synthesizing dialkylphosphinates, belonging to the field of organic synthesis technology. The method uses hypophosphite and haloalkanes as starting materials. First, a hypophosphite is generated through a heated and pressurized reaction under the action of a phase transfer catalyst. The obtained hypophosphite does not require complex purification; it is directly reacted with an olefin under heated and pressurized conditions in the presence of a free radical initiator to obtain the target product, dialkylphosphinate. The method of this invention uses inexpensive and readily available raw materials, has a simple process route, includes only two core reactions, operates under mild conditions, is safe and convenient, produces few and easily treatable byproducts, has a high product yield, and is simple to purify. It is very suitable for large-scale industrial production, providing an economical and efficient synthetic route for the preparation of high-performance halogen-free flame retardants.

The present invention provides a feed composition comprising: a) at least one organic acid and / or at least one salt thereof; and b) a hypophosphorous acid and / or at least one salt thereof, as well as the use of the feed composition for improving animal growth performance and / or improving animal immunity and / or reducing animal mortality.

The invention provides a high-strength, high-temperature-resistant and flame-retardant cable sheath material. The high-strength, high-temperature-resistant and flame-retardant cable sheath material is prepared from the following raw material components in parts by weight: 40-70 parts of matrix resin, 10-30 parts of reinforced fibers, 15-30 parts of a flame retardant, 5-15 parts of an anti-ant agent, 2-8 parts of a compatibilizer, 0.5-5 parts of a processing aid and 2-4 parts of color master batch. The matrix resin comprises at least one of polyamide-imide resin, polyether-ether-ketone or polyurethane resin. The reinforced fibers comprise amino modified carbon fibers and aramid fibers, and the mass ratio of the amino modified carbon fibers to the aramid fibers is 1: (1-3). The flame retardant comprises nano magnesium hydroxide and aluminum hypophosphite, and the mass ratio of the nano magnesium hydroxide to the aluminum hypophosphite is (2: 1)-(3: 1). The invention discloses a cable protection sleeve, and aims to solve the common problems that an existing cable protection sleeve is prone to embrittlement or deformation in extreme weather such as freezing rain and high temperature, novel materials are high in manufacturing cost and difficult to be put into large-scale commercial use, and meanwhile, termites and rodents damage cables.

The application belongs to the technical field of new energy materials and electrochemical catalysis, and provides an oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst, a preparation method and application thereof. A foam nickel is used as a working electrode, a platinum sheet is used as a counter electrode, and a Hg / HgO electrode is used as a reference electrode. In an electrolyte solution containing a nickel salt and a cerium salt, electrodeposition is performed to obtain a precursor. The precursor includes the foam nickel and cerium and nickel deposited on the foam nickel. The precursor is soaked in a tannic acid solution to obtain an impregnated precursor. Ammonium hypophosphite is placed upstream, and the impregnated precursor placed downstream is subjected to phosphorus nitride doping treatment to obtain the oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst. The obtained oxygen vacancy-rich nitrogen-doped nickel phosphide / cerium oxide composite catalyst exhibits excellent electrocatalytic performance for methanol oxidation reaction (MOR) and can be used as a high-efficiency anode catalyst for a direct methanol fuel cell (DMFC).

The invention relates to a flame-retardant TPU (thermoplastic polyurethane) film, which relates to the technical field of high polymer materials and comprises the following components in parts by mass: 50-70 parts of polyurethane master batch, 15-25 parts of compound halogen-free flame retardant, 10-20 parts of flame-retardant filler, 5-8 parts of heat stabilizer, 2-4 parts of lubricant, 1-3 parts of plasticizer and 1-2 parts of antioxidant, the compound halogen-free flame retardant comprises magnesium hydroxide, ammonium polyphosphate and aluminum hypophosphite; the flame-retardant filler comprises carbon black. According to the TPU film, the flame retardant property of the TPU film can be improved, and the TPU film has good tensile property at the same time.

The application discloses a preparation method of a supported high-dispersion molybdenum phosphide catalyst, and comprises the following steps: S1, dissolving molybdenum acetylacetonate and ammonium hypophosphite in an aqueous solution of N,N-dimethylformamide to obtain an impregnation solution; S2, immersing a carrier in the impregnation solution, then drying and reducing to obtain a supported molybdenum phosphide catalyst. The hydrogenation activity and the hydrodesulfurization activity of the prepared molybdenum phosphide catalyst are higher than those of MoP catalysts prepared by a temperature programmed reduction method and a molybdenum trioxide reduction method with ammonium hypophosphite, and the molybdenum phosphide catalyst has very high hydrodesulfurization activity on p-benzothiophene.

The application relates to the technical field of flame-retardant materials, and discloses a flame-retardant material and a preparation method thereof. The flame-retardant material comprises the following components by weight: nylon 40-85 parts, diisobutyl aluminum hypophosphite 5-20 parts, brominated polystyrene 5-20 parts, antimony trioxide 1-3 parts, fibers 0-35 parts, and antioxidant 0.2-0.5 parts; and the antimony trioxide is composed of cubic antimony trioxide and rhombic antimony trioxide. The technical scheme solves the problem of poor flame-retardant performance of the flame-retardant material in the related art.

The application discloses a preparation method of aluminum dialkyl hypophosphite with different alkyl groups, and comprises the following steps: (1) dispersing aluminum hypophosphite solid in a low concentration in a solvent system containing alkali metal hydroxide and water, the mass ratio of the aluminum hypophosphite solid to water being 1:20-1000; under the initiation of a free radical initiator, making olefin 1 and the aluminum hypophosphite solid to have an addition reaction at 100-150 DEG C and 0.1-0.3 MPa, and controlling the consumption of the olefin 1 to be sufficient for the reaction of the aluminum hypophosphite solid, so as to prepare an aluminum monoalkyl hypophosphite solution, filtering the precipitate, and collecting the filtrate; (2) continuously feeding olefin 2 different from the olefin 1 into the filtrate, and making the aluminum monoalkyl hypophosphite and the olefin 2 to have an addition reaction under the initiation of the free radical initiator at 100-150 DEG C and 0.1-0.3 MPa, so as to obtain aluminum dialkyl hypophosphite with different alkyl groups. The purity of the aluminum dialkyl hypophosphite with different alkyl groups prepared by the application is above 99.5%.

The invention discloses luminous ink for preparing a scintillation layer and a preparation method and application of the luminous ink. The preparation method comprises the steps that cuprous iodide is dissolved in a saturated potassium iodide aqueous solution, hypophosphorous acid is added, and a first mixed solution is obtained; adding the first mixed solution into a polyvinylpyrrolidone solution to obtain a second mixed solution; the preparation method comprises the following steps: dissolving phenyl trimethyl ammonium iodide in a mixed solution of ethanol and acetonitrile to obtain a phenyl trimethyl ammonium iodide solution; quickly mixing a phenyltrimethylammonium iodide solution with the second mixed solution, stirring for a period of time, centrifuging and washing to obtain nano-particles, and dispersing the nano-particles into a solvent; metal copper-based halide nanoparticles are prepared at room temperature by using a single-component solution method, and then the metal copper-based halide nanoparticles are dispersed into a solvent to obtain the luminous ink. And then the luminous ink is uniformly sprayed on a selected substrate, and the thickness and the area can be freely adjusted according to requirements, so that a high-resolution scintillation layer is prepared.

The invention relates to the technical field of alloy materials, and discloses a flame-retardant PC / ABS alloy and a preparation method thereof.The preparation method comprises the steps that firstly, a molecular sieve is activated, aluminum hypophosphite is subjected to in-situ deposition in pore channels or orifices of the molecular sieve, and a molecular sieve / aluminum hypophosphite composite carrier is obtained; graphene oxide and the composite carrier are dispersed together, thermal chemical treatment is carried out in an inert atmosphere with hypophosphite as a treatment medium, a graphene oxide / molecular sieve / aluminum hypophosphite hybrid flame retardant is constructed, and a chemical anchoring interface is formed; carrying out melt blending by adopting double screws, and loading the hybrid flame retardant on carrier resin to prepare master batches; and blending the master batch with polycarbonate and an acrylonitrile-butadiene-styrene copolymer, carrying out vacuum devolatilization to complete melt extrusion, and carrying out water cooling, pelletizing and uniform mixing to obtain the flame-retardant PC / ABS alloy. The flame retardant is uniformly dispersed through pore channel confinement and chemical anchoring, and the char forming synergistic effect is enhanced.

The invention discloses a nitrogen-phosphorus-bromine synergistic flame-retardant and anti-ultraviolet aging polypropylene composite material and a preparation method and application thereof, and particularly relates to the technical field of macromolecules, the nitrogen-phosphorus-bromine synergistic flame-retardant and anti-ultraviolet aging polypropylene composite material comprises the following components by weight: 70-80 parts of polypropylene; 10 to 20 parts of brominated flame retardant; 5-10 parts of a phosphorus-based flame retardant containing a hypophosphorous acid or phosphorous acid structure; 1-5 parts of a nitrogen flame retardant containing a six-membered hindered amine heterocyclic structure; the weight ratio of the phosphorus-based flame retardant containing the hypophosphorous acid or phosphorous acid structure to the nitrogen-based flame retardant containing the six-membered hindered amine heterocyclic ring structure is 1: 1-10: 1, efficient flame retardance, excellent weather resistance and good processability can still be achieved under the condition that antimony trioxide is not added completely, the dependence of a traditional bromine-antimony system on an antimony synergist is broken through, and the flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free flame-retardant halogen-free The common problems of processing thermal decomposition and performance degradation in a traditional halogen-antimony system are effectively avoided.

The present application belongs to the technical field of semi-coke wastewater pretreatment, and particularly relates to a dephenol extractant and a method for extracting and recovering phenol from wastewater containing phenol. The dephenol extractant provided by the present application comprises: N, N-di(1-methyl-heptyl)acetamide 40-60%, di(2,4,4-trimethylpentyl) hypophosphorous acid 30-55%, and an organic dispersing agent 1-10%. The dephenol extractant is used for multi-stage countercurrent extraction of wastewater containing phenol, and organic phase containing phenol and raffinate water phase are obtained. The dephenol extractant provided by the present application has high extraction efficiency, low water solubility, high stability, reliable recovery efficiency, and long service life. The dephenol extractant provided by the present application can be used to extract and recover phenol from semi-coke wastewater at low cost, high recovery efficiency, and high convenience, and can significantly reduce the concentration of phenols in wastewater, fully meeting the water inlet requirements of the subsequent biochemical treatment system for further treatment of semi-coke wastewater.

The application discloses a kind of solventless heat-resistant flame-retardant polyurethane adhesive and preparation method thereof, belong to polyurethane adhesive technical field.Pre-polymer is prepared by IPDI and phthalic anhydride diethylene glycol reaction, dihydroxy alkylate hypophosphorous acid (DAHA) ammonium salt is obtained by the reaction of hypophosphorous acid, paraformaldehyde and ammonia water, DAHA ammonium salt, 1,4-butanediol and terephthalic acid are mixed to prepare flame-retardant polyester polyol by intermittent process method, pre-polymer is mixed uniformly with flame-retardant polyester polyol to prepare solventless heat-resistant flame-retardant polyurethane adhesive.The solventless heat-resistant flame-retardant polyurethane adhesive prepared by the application has low viscosity, excellent flame-retardant heat-resistant performance, T type peel strength at room temperature is 5.4N / mm, T type peel strength at 80 DEG C can reach 3.1N / mm, flame-retardant effect reaches UL-94V-0 level, solve the shortcomings that polyurethane adhesive heat resistance and flame-retardant performance are poor, have significant economic benefit and social benefit.

The application relates to a tungsten alloy material wire cutting technical field, in particular to a preparation method of a high-strength tungsten wire composite material for cutting. The preparation method of the high-strength tungsten wire composite material for cutting comprises the following steps: preparing a base tungsten wire, preparing surface plated diamond, preparing modified plated diamond and preparing the high-strength tungsten wire composite material. In the application, the diamond micro powder is pretreated and activated, then is added into a plating solution of nickel sulfate, sodium molybdate and sodium hypophosphite dihydrogen, and is chemically plated to prepare a Ni-Mo-P plating layer on the surface of the diamond, and after the surface plated diamond is obtained, when the diamond is embedded into the base tungsten wire, a mechanical interlocking structure can be formed between the diamond and the base tungsten wire to resist the shearing stress during cutting, therefore, the preparation of the Ni-Mo-P plating layer on the surface of the diamond can effectively improve the bonding force between the diamond and the base tungsten wire and reduce the falling amount of the diamond during cutting.

The invention relates to an improved synthesis process of a cesium germanium bromide halogen perovskite material. The improved synthesis process comprises the following reaction steps: (1) constructing a condensation reflux device and a nitrogen pipeline; (2) weighing germanium dioxide, hydrobromic acid, concentrated hypophosphorous acid and absolute ethyl alcohol; (3) putting the three-neck flask into an oil bath pan, and connecting a condensation reflux device and a nitrogen gas path; (4) after germanium dioxide is completely dissolved, the solution in the flask is clarified; (5) injecting the cesium bromide solution into the three-neck flask in a nitrogen environment, heating, and reacting for a period of time; (6) cooling the solution to room temperature in a nitrogen environment, and collecting a yellow cesium germanium bromide crude product; and (8) refining the crude cesium germanium bromide to obtain refined cesium germanium bromide, wherein the impurity content is lower than 0.5%. According to the method, the cesium-germanium bromide solution and methylbenzene are used, so that the problem that divalent germanium ions and cesium bromide are not completely reacted is solved, and a good solution is provided for synthesizing a high-purity cesium-germanium bromide material.

The application discloses a method for synchronously reducing-doping-carbon-coating regenerated waste LiFePO4, a positive plate and a battery, and relates to the technical field of battery materials. The method comprises the following steps: S1, discharging and disassembling a waste lithium iron phosphate battery, separating out a positive material, and obtaining waste LiFePO4 powder after drying, ball milling and sintering; S2, ball milling and mixing the waste LiFePO4 powder, a lithium source and an organic aluminum hypophosphite compound to prepare a mixture; and S3, sintering the mixture in an inert atmosphere, and obtaining the positive material of the regenerated waste LiFePO4 after cooling. The method provided by the application can solve the problems of complex process, uneven element supplement, poor material conductivity and poor recovery of electrochemical performance of the existing regeneration technology, realize the synchronous reduction, Al 3+ doping, lattice doping, phosphorus element supplement and surface carbon coating, and significantly improve the comprehensive performance of the regenerated material. 3+ doping, lattice doping, phosphorus element supplement and surface carbon coating, and significantly improve the comprehensive performance of the regenerated material.

The invention discloses a preparation method of a cesium-copper-iodine semiconductor for a photoelectric device, and belongs to the field of semiconductor halide perovskite luminescence, and the cesium-copper-iodine semiconductor prepared by the method is used as a core functional material for manufacturing devices such as an LED (Light Emitting Diode), an ultraviolet photoelectric detector and a scintillator. The preparation method comprises the following steps: dissolving cesium-copper-iodine in an organic solvent, dropwise adding hypophosphorous acid to obtain a mixed solution, transferring the mixed solution into a reaction kettle for reaction to obtain a cesium-copper-iodine mixed solution, extracting cesium-copper-iodine microcrystalline powder by using an anti-solvent process, centrifuging, drying and grinding to obtain the cesium-copper-iodine microcrystalline powder. And the all-inorganic cesium-copper-iodine microcrystalline powder with high quantum yield, high crystallinity and high stability is obtained. The hypophosphorous acid added in the preparation is used for inhibiting oxidation and improving the synthesis quality of the cesium-copper-iodine microcrystal particles, and the synthesis in the reaction kettle is used for enabling the cesium-copper-iodine reaction to be more sufficient, the crystal structure to be more complete and the phase to be purer, so that the high stability and the high quantum yield of the cesium-copper-iodine microcrystal powder are ensured.

The application discloses a TPE composition for a protective film adhesive layer and a preparation method thereof, and relates to the technical field of polymer materials. The application comprises the following steps: mixing and internally mixing styrene-ethylene-butylene-styrene block copolymer and liquid paraffin, then adding modified elastomer, synergistic powder, modified nanoparticles, piperazine pyrophosphate, aluminum hypophosphite, L-arginine and a compatilizer and mixing, adding a crosslinking aid and mixing after cooling, pouring into a mold after discharging and pre-pressing under a nitrogen atmosphere, then gradient crosslinking, cooling, demolding and obtaining the TPE composition for the protective film adhesive layer. The addition of specific proportions of piperazine pyrophosphate, aluminum hypophosphite and L-arginine effectively improves the flame retardant capacity and ultraviolet resistance of the TPE composition; the introduction of the synergistic powder and other components further improves the interfacial adhesion, flame retardant capacity and ultraviolet resistance. Therefore, the application has a wider application prospect.

This invention provides a hypophosphite derivative, its preparation method, and a liquid-phase synthesis method for peptides using the hypophosphite derivative as a carrier, belonging to the fields of organic synthesis and peptide chemistry. In this invention, a hypophosphite derivative is prepared. The hypophosphite derivative provided in this application has advantages such as simple preparation method, low-cost raw materials, and easily adjustable structure. The peptide liquid-phase synthesis method using the hypophosphite derivative as a carrier can efficiently synthesize peptides and improve the solubility of intermediates in the preparation process of peptides (especially hydrophobic peptides), avoiding aggregation or precipitation, and has practical application value for peptide chemical synthesis.

The invention discloses a composite intumescent flame-retardant coating, a preparation method thereof and flame-retardant equipment. The composite intumescent flame-retardant coating comprises a flame-retardant raw material, wherein the flame-retardant raw material comprises the following components in parts by weight: 5-10 parts of expandable graphite, 5-15 parts of aluminum hydroxide, 5-15 parts of inorganic aluminum hypophosphite and 0.1-5 parts of titanium dioxide; the flame-retardant solvent comprises at least one of ethyl acetate and polyacrylic resin; the auxiliary agent comprises at least one of a dispersing agent, a defoaming agent, a flatting agent and a diluting agent; the weight ratio of the flame-retardant raw material to the flame-retardant solvent is 3: (4-10). Therefore, the composite intumescent flame-retardant coating has good flame-retardant performance, and can reach the 5VA standard; the components do not contain halogen, do not release harmful gas during combustion reaction, and are environment-friendly; the water resistance, the weather resistance and the adhesive force are high, the preparation method is simple, raw materials are easy to obtain, large-batch production can be achieved, and the application range is wide.

The invention discloses a flame-retardant polypropylene composition which comprises the following components in parts by weight: 50 parts of polypropylene resin, 12-35 parts of a flame-retardant / anti-dripping compound additive and 0.5-2 parts of a compatilizer, the flame-retardant / anti-dripping compound additive is a compound of a flame retardant and spherical aluminum oxide, the weight ratio of the flame retardant to the spherical aluminum oxide is 1: (6-7), the flame retardant is a main flame retardant and an auxiliary flame retardant, the main flame retardant is selected from an aluminum hypophosphite flame retardant and a brominated flame retardant, and the auxiliary flame retardant is selected from at least one of dicumyl peroxide and polydicumyl peroxide. The dripping property of a flame-retardant system of the composition can be remarkably improved through spherical aluminum oxide in a specific proportion, meanwhile, the heat conductivity coefficient can be improved and increased through the spherical aluminum oxide, heat can be rapidly conducted in a glowing filament test, the fire risk is reduced, the GWIT is increased, and a good scratch-resistant effect is achieved.

The present application relates to the field of potassium hypophosphite production, and particularly relates to a method and system for co-producing potassium hypophosphite and potassium phosphite, which comprises: replacing all the reaction kettles and pipelines with nitrogen to maintain a slight positive pressure in the system; continuously feeding potassium hydroxide aqueous solution and molten yellow phosphorus into the first-stage reaction kettle to generate potassium hypophosphite and phosphine through disproportionation reaction; feeding the reaction liquid into the second-stage reaction kettle to gradually increase the alkali concentration, and convert part of the potassium hypophosphite into potassium phosphite; feeding the reaction liquid into the third-stage reaction kettle to maintain the alkali concentration at a certain level, and convert part of the potassium hypophosphite into potassium phosphite and release hydrogen; feeding the reaction liquid into the fourth-stage reaction kettle to maintain the alkali concentration at a certain level, and continuously discharge the product containing the mixture of potassium phosphite and potassium hypophosphite from the fourth-stage reaction kettle after the reaction approaches equilibrium, thereby improving the production efficiency, reducing the raw material cost, improving the process safety, thermal energy utilization efficiency and product quality, and realizing the comprehensive utilization of the gas byproducts.

The application discloses polyolefin cable material for energy storage cable and a preparation method thereof, and relates to the technical field of cable material.The polyolefin cable material comprises the following raw materials in parts by mass: 30-55 parts of base resin, 40-70 parts of flame retardant, 2-10 parts of compatible toughening agent, 1-8 parts of smoke suppressant, and 1.0-5.0 parts of processing aid; the flame retardant comprises coated aluminum hypophosphite and ceramic powder; the ceramic powder is mullite powder treated by amino silicon oil, and the coated aluminum hypophosphite is aluminum hypophosphite coated by ammonium polyphosphate and melamine-formaldehyde resin. The preparation method comprises the following steps: S1, preparing raw materials according to the required proportion, premixing the base resin, and then hot-mixing the other raw materials to obtain premix; and S2, melt blending, extruding, cooling and cutting the premix to obtain the polyolefin cable material for energy storage cable. The polyolefin cable material for energy storage cable has the advantages of high toughness and no melting drop characteristic on the basis of high flame retardance and low smoke emission.

The present application relates to a kind of methods for preparing nanoscale uniform spherical aluminum hypophosphite based on hydrothermal method, the present application uses aluminum chloride six-water and sodium hypophosphite monohydrate as raw material, by adding ethylene glycol, the product morphology is adjusted under lower temperature hydrothermal route, the spherical structure with regular morphology and relatively smooth surface is obtained, preparation operation is simple, synthesis step is simple, raw material cost is low, process can be completed under lower temperature, is suitable for large-scale industrialization.By introducing ethylene glycol, the supersaturation of the system is controlled to affect the generation of crystal nucleus, the solvent viscosity is increased, which is beneficial to the growth of crystal nucleus diffusion control, further uniformizes the size of product, and forms uniform spherical particles.The preparation process of the present application is simple, the aluminum hypophosphite product synthesized has excellent morphology and good dispersibility, and is helpful for subsequent modification of aluminum hypophosphite.