174 results about "Polyphosphate" patented technology

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

A negative electrode material for secondary battery use includes silicon-containing particles and coating layers covering at least part of the surfaces of the silicon-containing particles. The silicon-containing particles each include an ion conductive phase and silicon phases dispersed in the ion conductive phase. The coating layers contain at least one phosphate compound selected from the group consisting of a phosphate compound, a polyphosphate compound, and a metaphosphate compound, each of which contains an anion represented by general formula (1):In general formula (1), A represents an organic group or an oxygen atom.

The invention belongs to the field of polyurethane materials, and particularly discloses a flame-retardant polyurethane material as well as a preparation method and application thereof. The flame-retardant polyurethane material comprises the phosphorus flame retardant, the melamine polyphosphate and the barium metaborate, the phosphorus flame retardant, the melamine polyphosphate and the barium metaborate have a synergistic effect, a continuous, compact and glassy-state-like carbon barrier layer is formed at the burning position of the material, halogen-free flame retardance of the polyurethane material can be achieved, and molten drops can be effectively prevented. Besides, the polyurethane material disclosed by the invention is proper in component and dosage, so that the material formability is good, bubbles and flame retardant precipitation after the material is formed can be avoided, and the utilization rate of the flame retardant is increased.

The application discloses a gold leaching method for pyrite-containing gold ore, and comprises the following steps: after the pyrite-containing gold ore is finely ground, water is added to obtain a slurry; a gold leaching reagent solution is added into the slurry to obtain a mixed leaching solution; the pH value of the mixed leaching solution is adjusted to alkaline, and leaching treatment is performed; and after filtration, a gold-containing leaching solution is obtained; the gold leaching reagent solution comprises polyphosphate, copper salt and thiosulfate; in the gold leaching reagent, polyphosphate is added; under alkaline conditions, polyphosphate ions can be selectively adsorbed or complexed on the surface active sites of pyrite to form a physical or chemical masking layer, thereby effectively blocking the direct contact of pyrite with dissolved oxygen and thiosulfate in the solution, inhibiting the catalytic decomposition of pyrite, significantly reducing the invalid consumption of thiosulfate, stabilizing the pH value and potential of the leaching system, and guaranteeing the efficient leaching of gold.

This invention discloses a flame-retardant rubber and its preparation method. The flame-retardant rubber, by weight, comprises: 45-65 parts of ethylene-vinyl acetate copolymer; 12-20 parts of ethylene propylene diene monomer (EPDM) rubber; 3-6 parts of maleic anhydride-grafted ethylene-vinyl acetate copolymer; 8-12 parts of phosphorus-modified nanocellulose; 2-5 parts of submicron zinc borate; 2-4 parts of melamine polyphosphate; 0.5-2.5 parts of graphene; 1-2.5 parts of phosphorus-containing flame-retardant plasticizer; and 1-4 parts of multifunctional acrylate crosslinking agent. This application replaces traditional melamine with melamine polyphosphate (MPP). MPP has higher thermal stability, its decomposition temperature matches the char formation window of P-NC more closely, and it has its own phosphorus source, enabling a complementary and continuous phosphoric acid supply with P-NC on both the time and temperature axes, thus solving the problem of insufficient phosphorus catalysis after reducing the amount of P-NC alone.

According to the method, melamine and urea are used as carbon and nitrogen sources, hollow tubular phosphorus-doped carbon nitride is constructed by adopting a sodium polyphosphate-assisted hydrothermal-thermal polymerization method, molybdenum disulfide is loaded on the surface of P-TCN in a hydrothermal in-situ growth mode, and the hollow tubular phosphorus-doped heterojunction photocatalyst is obtained. The hollow tubular phosphorus-doped heterojunction photocatalyst P-TCN / MoS2 is prepared; the catalyst disclosed by the invention shows excellent degradation performance on ciprofloxacin, levofloxacin, rhodamine B and methylene blue under an illumination condition. The catalyst disclosed by the invention is simple in preparation method, low in cost and easily available in raw materials, and has a wide application prospect in the field of photocatalytic treatment of antibiotic and dye wastewater.

Based on experimental data, observed i n the Personalized Medicine Laboratory of the requesting institute, which reveal an increase in the inorganic polyphosphate (iPolyp) in fecal samples from subjects affected by colorectal cancer compared to samples from individuals not affected by the same disease, inorganic polyphosphate is suggested as a novel non-invasive biomarker to be detected in fecal samples for the early diagnosis of colorectal cancer, to be associated with other screening methods such as fecal occult blood, in order to provide greater predictivity, i.e., the probability that a subject with a positive diagnostic test is actually affected by colorectal cancer.

A process for producing and recovering acetic acid in an acetic acid production system is disclosed, the process comprising contacting methanol, methyl acetate, or a mixture of both with carbon monoxide in the presence of a reaction mixture comprising iodide under carbonylation conditions sufficient to form acetic acid. The reaction mixture comprises a carbonylation catalyst, water, and one or more promoters selected from the group consisting of Group I polyphosphates and polyphosphonates and Group II polyphosphates and polyphosphonates, and mixtures thereof. One aspect of the process includes a method for reducing water in an acetic acid production process.

This invention provides a biological nitrogen and phosphorus removal system and method for wastewater treatment, relating to the field of wastewater treatment technology. The system includes: an anaerobic zone, a denitrification-anoxic zone, a low dissolved oxygen aeration zone, a solid-liquid separation zone, and an equipment zone, sequentially connected along the wastewater flow direction; the anaerobic zone is connected to an inlet pipe; the solid-liquid separation zone is equipped with a drain pipe; the equipment zone includes stirring equipment and dissolved oxygen supply equipment. Each biological tank in the system operates with a high sludge concentration. The system provided by this invention can enhance the ability of microorganisms in the anaerobic zone to absorb organic matter and release phosphates. It can promote simultaneous nitrification-denitrification and denitrification-phosphorus removal reactions in the denitrification-anoxic tank for nitrogen and phosphorus removal. Simultaneous nitrification-denitrification and polyphosphate accumulation reactions can be carried out in the low dissolved oxygen aeration tank, achieving organic matter removal without the need for additional carbon sources, with low aeration intensity, low operating energy consumption, and good treatment effect.

The invention discloses an insulating, heat-conducting and flame-retardant carrier-free multifunctional master batch as well as a preparation method and application thereof. The multifunctional master batch is prepared from the following raw materials: modified hexagonal boron nitride, aluminum oxide with a core-shell structure, a flame retardant, an antioxidant, a processing aid and a binder. The surface of the modified hexagonal boron nitride is modified by tri (dioctylpyrophosphoryloxy) titanate, the aluminum oxide with the core-shell structure is coated by silicon dioxide, and the aluminum oxide is alpha crystal form aluminum oxide. And the flame retardant is diethyl aluminum hypophosphite and melamine polyphosphate. The preparation method of the multifunctional master batch comprises the steps of cold pressing, crushing and drying. The multifunctional master batch can be applied to modification of polymer composite materials such as PA66, PA6 and PBT, and can comprehensively improve the electrical insulation, heat conduction and flame retardant properties of the polymer composite materials.

This application relates to the field of rare earth smelting and separation technology, and discloses an ultrasonic-enhanced electrochemical coupling process for the complete separation of rare earth oxides, comprising the following steps: adding a polyphosphate complexing agent and a redox mediator to a cerium-rich rare earth aqueous solution as the anolyte, and pumping it into a dual-chamber membrane electrolytic cell separated by a cation exchange membrane for circulation. An electroacoustic phase-controlled synchronous system is activated to perform periodic reverse-phase pulse operations of turning on the ultrasonic current to decrease and turning off the ultrasonic current to increase. When the trivalent cerium conversion rate reaches a first threshold, the pH is dynamically adjusted and the current is reduced; when it reaches a second threshold, the process is stopped and the temperature is raised to mature the complex salt crystalline phase. The slurry is hot-pressed and filtered; the filter cake is dephosphorized and washed by alkaline solid-phase decomposition, and then calcined at a constant temperature to obtain high-purity cerium dioxide powder. This invention employs a dual-chamber electrolysis technology scheme using polyphosphate complexation combined with a perfluorosulfonic acid cation exchange membrane, achieving the technical effect of zero cathode penetration of rare earth materials.

The present application relates to a kind of intumescent fireproof composite board, including sequentially stacked inner layer, intumescent fireproof layer and outer layer, the inner layer is galvanized steel sheet, the intumescent fireproof layer, including the following mass parts of raw materials: carbonization agent 25~40 parts, acid source 10~25 parts, foaming agent 5~15 parts, filler 5~10 parts, resin 20~40 parts, water 20~30 parts, the acid source is ammonium polyphosphate, melamine polyphosphate and polyphosphoric acid hexamino cyclotriphosphazene Compound, the filler includes low-temperature expandable graphite;The outer layer is aluminum foil glass fiber cloth.The acid source of the present application is compounded, so that the fireproof composite board forms an expanded carbon layer at 250~400 DEG C;By compounding filler, the fireproof composite board forms an expanded isolation layer below 200 DEG C;That is, the intumescent fireproof composite board of the present application continuously plays a fire-retardant and heat-insulating role in the whole process stage of fire, meets the fireproof and heat-insulating requirements of Saturn cloud cabinet.

The invention relates to the field of single-molecule gene sequencing, in particular to a composite nucleotide probe based on a nucleic acid nanostructure and application of the composite nucleotide probe. The structure of the composite fluorescent nucleotide probe provided by the invention is a multi-level structure, the multi-level structure respectively comprises a nano nucleic acid molecule, streptavidin and a biotin-nucleoside polyphosphate compound from inside to outside, and the nano nucleic acid molecule, the streptavidin and the biotin-nucleoside polyphosphate compound are connected through biotin. The nucleic acid chain, biotin modification and fluorescent dye molecule modification assembled into the nucleic acid nanostructure can be ordered and synthesized by commercial synthesis companies, the price is low, and synthesis is rapid and convenient; the three-dimensional branched connecting molecules can fully disperse the dendritic macromolecules with large volumes in a three-dimensional space. The planar branched connecting molecule is used for connecting the nucleoside polyphosphate and the polyethylene glycol dispersing element, so that the distance between the nucleoside polyphosphate and the polyethylene glycol is relatively short, the polyethylene glycol can conveniently separate and protect the nucleoside polyphosphate, and the diffusion effect of the nucleoside polyphosphate in an aqueous solution is improved.

The invention discloses nano calcium polyphosphate-containing toothpaste with a repairing effect and a preparation method of the nano calcium polyphosphate-containing toothpaste. The toothpaste is prepared from the following components in percentage by mass: 5 to 15 percent of water, 55 to 75 percent of a polyol humectant, 0.2 to 1 percent of sodium carboxymethyl cellulose, 2 to 8 percent of sodium lauryl sulfate, 15 to 20 percent of silicon dioxide, 0.01 to 0.4 percent of menthol, 0.01 to 0.07 percent of a preservative and 0.01 to 0.1 percent of nano calcium polyphosphate. The nano calcium polyphosphate is introduced into a toothpaste system, and the nano calcium polyphosphate can be effectively attached to and actively repair microscopic defects on the enamel surface by utilizing the high specific surface activity and biomimetic mineralization characteristics of the nano calcium polyphosphate. The toothpaste not only has a conventional cleaning function, but also can remarkably reduce tooth surface roughness, recover microhardness and relieve dentin sensitivity, daily active repair of tooth hard tissue is achieved, and the defect of existing toothpaste in the aspect of direct structural repair is overcome.

The method for preparing high-phosphorus Chlamydomonas based on PTB2 overexpression and its application in phosphorus recovery belongs to the fields of bioengineering and environmental science. This method obtains recombinant Chlamydomonas by cloning and overexpressing the PTB2 gene, a sodium-phosphorus-dependent phosphate transporter, from Chlamydomonas reinhardtii. This recombinant Chlamydomonas exhibits a synergistic and significant increase in total phosphorus content and polyphosphate content, while also showing promoted growth. The high-phosphorus recombinant Chlamydomonas of this invention can efficiently remove phosphorus from water bodies and can be used for eutrophication control; simultaneously, its high-phosphorus biomass can serve as a high-quality microalgal fertilizer raw material, providing an efficient and environmentally friendly technical solution for the biological recovery and recycling of phosphorus resources.

The invention relates to the field of flame-retardant modified polyolefin master batch materials, in particular to a halogen-free flame-retardant master batch as well as a preparation method and application thereof. The halogen-free flame-retardant master batch is prepared from carrier resin, a halogen-free flame-retardant system, a coupling-dispersing composite additive, a small amount of antioxidant, a small amount of lubricant and a small amount of nucleating agent, and the creativity of the halogen-free flame-retardant master batch can be expanded and highlighted through the synthesis direction of epoxy acrylic resin. A halogen-free flame-retardant system formed by surface activation of aluminum diethylhypophosphite, coating of ammonium polyphosphate microcapsules, nano layered barrier modification of montmorillonite and matching of melamine polyphosphate can be uniformly distributed in carrier resin, and the flame-retardant protection performance of a plastic product can be effectively improved under the condition of low filling amount; the method is simple in process, low in energy consumption and suitable for flame-retardant modification of films, fibers, injection molding products and extruded products.

The present invention provides a flame retardant composition which has an excellent flame retardancy and water resistance, a flame-retardant resin composition, a molded article, and a molded product thereof. The present invention provides a flame retardant composition characterized by containing the following component (A), component (B) and component (C). In the flame retardant composition, the component (A) is one or more melamine salts selected from the group consisting of melamine orthophosphate, melamine pyrophosphate and melamine polyphosphate; the component (B) is one or more piperazine salts selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate and piperazine polyphosphate; and the component (C) is an epoxy compound having a molecular weight or a number average molecular weight of from 300 to 10,000.

This utility model discloses a denitrification packing carrier for biological filters, belonging to the field of denitrification packing technology. It includes a packing matrix with multiple insertion and mounting cavities on its sidewalls and a mesh structure, microbial balls placed inside the packing matrix, and packing blocks located at each of the insertion and mounting cavities. Several packing blocks are attached to the sidewalls of the packing matrix, allowing it to contact wastewater from various directions. The activated carbon adsorption packing within the mesh packing blocks adsorbs the wastewater in the biological filter, while nitrifying bacteria, denitrifying bacteria, and polyphosphate-accumulating bacteria loaded on the microbial balls perform combined denitrification treatment. During the treatment process, the exothermic balls in each release cavity heat up upon contact with water, raising the temperature of the biological filter and thus promoting the denitrification reaction efficiency. This denitrification packing carrier for biological filters can efficiently and stably treat nitrogen pollutants in wastewater, achieving water purification goals.

This invention discloses a polyphenylene ether composition, its preparation method, and its applications. The polyphenylene ether composition comprises the following components: 9-26 parts PPE resin, 19-41 parts PA resin, 5-10 parts phosphorus-containing flame retardant A, 2-6 parts phosphorus-containing flame retardant B, 5-15 parts compatibilizer, and 10-40 parts glass fiber; the zero-shear viscosity of the polyphenylene ether composition is 10000-100000 Pa·s; the average retention length of the glass fiber is 0.2-0.35 mm; phosphorus-containing flame retardant A is selected from one or more of hypophosphite flame retardants, red phosphorus, and polyphosphate flame retardants; phosphorus-containing flame retardant B is selected from one or more of phosphate ester flame retardants and phosphazene flame retardants. The polyphenylene ether composition exhibits good ablation resistance.

A flame-retardant metal-resin composite material according to the present disclosure is a metal-resin composite material in which metal layers are laminated on both surfaces of a core material layer containing a resin. The core material layer contains a metal hydroxide, a resin having a specific polar group, and a flame retardant containing at least one compound selected from the group consisting of an inorganic polyphosphate compound, an inorganic phosphite compound, an inorganic phosphinate compound, an inorganic metaphosphate compound, a melamine compound, and a triazine compound.

The invention relates to the field of metal iron-based surface coating, and discloses a water-based pretreatment agent, a preparation method and application thereof, and a preparation method of a hot-dip galvanized color-coated sheet, the raw materials for preparing the water-based pretreatment agent comprise a water-soluble resin polymer, metal salts, an oxidizing agent, a hole sealing agent, an auxiliary agent, an organic solvent and water; wherein the water-soluble resin polymer contains water-based acrylic resin and water-based polyurethane resin; the metal salts comprise a titanium salt, a zirconium salt, a molybdenum salt and a cerium salt; the oxidizing agent is sodium permanganate; perfluorooctyl trichlorosilane is adopted as the hole sealing agent; the auxiliary agent contains polyphosphate and phytic acid; the organic solvent contains normal propyl alcohol and methyl acrylate; by developing a novel pretreatment formula, the problems of poor adhesive force and reduced durability of the hot-dip galvanized environment-friendly color-coated sheet in the processing process can be solved.

The invention provides a polyethylene composition as well as a preparation method and application thereof, and the polyethylene composition comprises the following components in parts by weight: 54-71 parts of low-density polyethylene, 9-16 parts of linear low-density polyethylene, 15-35 parts of a composite flame retardant, 0.1-1 part of an antioxidant and 0.1-1 part of an anti-dripping aid, wherein the composite flame retardant comprises a phosphoric acid flame retardant, an inorganic zinc salt flame retardant, melamine polyphosphate and melamine cyanurate; the polyethylene composition provided by the invention has high flame retardancy, high toughness and high flow processability under the conditions of no halogen-containing flame retardancy, safety and environmental protection.

The invention discloses a solvent-free latent-curing fireproof coating and a preparation method thereof, and belongs to the technical field of fireproof flame-retardant materials. Polyphosphate, polyhydric alcohol and epoxy resin are used as raw materials to prepare the solvent-free latent curing fireproof coating, the polyphosphate is any one of ammonium salt and metal salt of polyphosphoric acid, the polyhydric alcohol is an alcohol compound containing two or more hydroxyl groups, and the epoxy resin is epoxy resin. The epoxy resin is an organic compound containing two or more epoxy groups. The solvent-free latent-curing fireproof coating disclosed by the invention can be stored for a long time at room temperature or low temperature, and epoxy resin is rapidly cured by a polyphosphate-polyol system at high temperature, so that the fireproof coating is obtained. The fireproof coating has the characteristics of high mechanical strength, flame retardance, low smoke, low toxicity and the like. The preparation process disclosed by the invention is simple, low in cost and high in operability.

The invention discloses a production method of a polyamide ultrathin film. The production method is characterized in that the polyamide ultrathin film is composed of caprolactam, PA56 salt, zinc-cerium antibacterial white carbon black, a cyclic dimer, white oil, aluminum ion modified melamine polyphosphate, aluminum diethylphosphinate and an antioxidant. The thickness of the film is 9 microns. The polyamide ultrathin film prepared by the invention has good mechanical properties.

The invention relates to the technical field of flame retardants, in particular to a halogen-free flame retardant melamine polyphosphate continuous production method and device, and the method comprises the following steps: metering melamine and phosphoric acid through a metering pump, inputting the metered melamine and phosphoric acid into a reactor unit, and carrying out preliminary reaction to generate melamine phosphate; melamine phosphate is cooled by the screw conveyor and then collected in an MP receiving tank; melamine phosphate in the MP receiving tank is conveyed to the fluidized bed reactor through the MP metering pump, the melamine phosphate and heated nitrogen are subjected to a thermal condensation reaction in the fluidized bed reactor to obtain the melamine polyphosphate, the uniformity and the stability of the melamine polyphosphate prepared by the method and the device are ensured, the quality of the melamine polyphosphate is improved, and the production cost is reduced. By accurately controlling reaction conditions, unnecessary energy consumption and waste generation are reduced.

The application provides an intumescent fireproof and anticorrosive coating, which comprises the following components and the mass percentage of each component is as follows: 18-25% of a film forming agent, 22-30% of an acid source, 8-10% of a carbon source, 8-10% of a gas source and 15-25% of an anticorrosive agent, the film forming agent is a mixture of organic silicon modified acrylic resin and water-based epoxy emulsion, the acid source is ammonium polyphosphate or polyphosphate, the carbon source is pentaerythritol or di-pentaerythritol, the gas source is melamine or dicyandiamide, and the anticorrosive agent is a mixture of aluminum tripolyphosphate, zinc phosphate and aluminum silver paste. The application has the functions of fireproofing and anticorrosion at the same time, and the fireproof coating and the anticorrosive coating do not need to be coated respectively, so that the construction process can be reduced, the construction period can be shortened, and the construction cost can be reduced; meanwhile, the effective protection of the base material can reduce the number of maintenance and replacement caused by corrosion or fire damage, and the comprehensive maintenance cost can be reduced in the long run.

The invention relates to a high-voltage-resistant anti-breakdown automobile wire sheath and a preparation method thereof, and relates to the technical field of automobile wire harnesses, and the high-voltage-resistant anti-breakdown automobile wire sheath comprises a modified styrene-ethylene-butylene-styrene block copolymer, polypropylene, functionalized magnesium hydroxide, melamine polyphosphate, white oil and a functional auxiliary agent. An N-vinylcarbazole group grafted on a styrene-ethylene-butylene-styrene block copolymer molecular chain is used as an electron donor, an anthraquinone derivative chemically bonded on the surface of a magnesium hydroxide particle is used as an electron acceptor, and the N-vinylcarbazole group and the anthraquinone derivative form a large number of charge transfer complexes at an interface through pi-pi interaction. According to the charge transfer complexes, a high-density deep energy level trap is introduced into an energy band structure of the material, so that the charge behavior of the material in a high electric field is changed, and high-performance high-voltage-resistant and anti-breakdown effects are realized.

A flame-retardant plastic composition according to an embodiment of the present disclosure comprises a polypropylene (PP)-based resin, a phosphorus / nitrogen-based compound, an anti-hydrolysis agent, and talc, wherein the phosphorus / nitrogen-based compound may include at least one of piperazine pyrophosphate (PPAP) or melamine polyphosphate (MPP).

The application discloses a PBT modified material and a preparation method and application thereof, and belongs to the technical field of high polymer engineering plastics. The PBT modified material provided by the application comprises the following components in parts by mass: PBT resin 33-68 parts, glass fiber 18-40 parts, flame retardant 10-22 parts, hydrotalcite and / or zinc oxide 0.08-0.49 parts. The flame retardant is a coated flame retardant with a core-shell structure, the core layer is melamine polyphosphate, and the shell layer is aluminum diethyl phosphite. The mass ratio of the shell layer to the core layer is greater than or equal to 1. The TVOC of the flame retardant under the condition of 180 DEG C and 60 min is less than or equal to 300 mu g C / g. The PBT modified material provided by the application has low odor and low metal corrosion, and also has good mechanical properties and flame retardance. Meanwhile, the preparation method of the PBT modified material is simple, and is beneficial to practical application.

The invention relates to the field of high polymer materials, and discloses a high-appearance precipitation-free halogen-free flame-retardant reinforced polypropylene composite material and a preparation method thereof. The polypropylene composite material comprises the following raw material components in percentage by mass: 27.5-50.2% of polypropylene resin; 35 to 40% of halogen-free flame retardant master batch; 8-15% of glass fiber; 3 to 8% of polypropylene grafted hydroxyethyl cellulose; 3-8% of polypropylene grafted acrylic acid; 0.3-1% of a lubricant; 0.2%-0.5% of an antioxidant; the halogen-free flame retardant master batch comprises the following raw materials in percentage by mass: 16-22% of piperazine pyrophosphate; 40 to 44 percent of melamine polyphosphate; 38-42% of polypropylene resin; the glass fiber, the piperazine pyrophosphate and the melamine polyphosphate are glass fiber, piperazine pyrophosphate and melamine polyphosphate which are pretreated by a hydroxyl acrylic emulsion. The halogen-free flame-retardant reinforced polypropylene composite material prepared by adopting the formula has no flame retardant precipitation in a high-temperature and high-humidity environment, and has excellent appearance performance.