60 results about "Polyphosphate" patented technology

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.

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 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 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.

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.

This invention provides a composite flame retardant, its preparation method, and its application in thermosetting powder coatings, relating to the field of flame retardant technology. In the composite flame retardant provided by this invention, microencapsulated ammonium polyphosphate significantly improves the interfacial compatibility between the composite flame retardant and the thermosetting polyester resin in the thermosetting powder coating, enhancing the mechanical properties of the coating. The synergistic use of microencapsulated ammonium polyphosphate and melamine polyphosphate further improves the flame retardant performance of the composite flame retardant. A silane coupling agent further improves the interfacial compatibility between the composite flame retardant and the thermosetting polyester resin, enhancing the mechanical properties of the coating. The synergistic use of core-shell structured polyacrylate microspheres and aluminum diethylphosphinate achieves both a high flame retardant safety level and excellent maintenance of the coating's mechanical properties. The composite flame retardant provided by this invention, when added at a moderate level in thermosetting powder coatings, results in a coating with both excellent flame retardant and mechanical properties.

The application relates to the technical field of cable materials, and discloses a high-strength oil-resistant cable material and a preparation method thereof; the preparation method comprises the following operation steps: mixing polyether polyurethane resin and butyronitrile rubber at 70-90 DEG C for 3-6 minutes, adding modified microcapsules, an antioxidant, an ultraviolet absorber and a lubricant to continue mixing, and extruding and granulating at 120-160 DEG C to obtain the high-strength oil-resistant cable material. In the scheme, in order to solve the problem that the oil resistance of the cable material is affected by the poor compatibility of the polyphosphate flame retardant with the polyurethane resin due to the strong hydrophilicity of the polyphosphate flame retardant, the polyphosphate flame retardant is made into hydrophobic coated aluminum polyphosphate, and the microcapsules are prepared by taking the hydrophobic coated aluminum polyphosphate as a core material, so that the network compactness of the microcapsules is improved, and the oil resistance and the strength of the cable material are improved.

Fire retardant paint compositions comprising polymeric binders derived from vinyl ester monomer, polyphosphate salts, nitrogen containing blowing agents, and charring agents are provided. When applied to substrates the paint compositions form durable coatings useful in protecting the substrates from fire.

The application relates to the food processing technical field and discloses a preparation method of ash bean curd leisure food rich in dietary fiber, which is prepared from the following raw materials in parts by weight: mature soybean milk 1000 parts; dietary fiber emulsion precursor 180-250 parts; and composite coagulant 3-5 parts; wherein the dietary fiber emulsion precursor is an oil-in-water emulsion with a pH value of 6.8-7.2 formed by shearing and homogenizing water, dietary fiber, vegetable oil, polyphosphate and organic acid. The dietary fiber is adsorbed on the oil-water interface to form an emulsion structure, thereby avoiding the mechanical cutting effect caused by directly dispersing the fiber particles in the protein matrix and maintaining the continuity of the gel network. Meanwhile, the pH value of the emulsion precursor is pre-adjusted by the organic acid, the chemical interference of the alkalinity of the polyphosphate on the acidic coagulant is eliminated, the compact formation of the protein gel is ensured, the content of the dietary fiber is increased, and the delicacy and water retention of the finished product are remarkably improved.

This invention provides a halogen-free flame retardant composition and its preparation method. The raw materials of the halogen-free flame retardant composition, by weight percentage, include 50%–70% polypropylene, 5%–10% reinforcing material, 20%–35% halogen-free flame retardant, 0%–10% flame retardant synergist, 0%–10% compatibilizer, 0.2%–1% anti-dripping agent, and 0.5%–2% processing aid. The halogen-free flame retardant, by weight percentage, comprises: 50%–60% metal ion-modified piperazine polyphosphate, 10%–20% metal ion-modified melamine polyphosphate containing melamine condensate, 10%–30% metal ion-modified melamine polyphosphate containing silane structure, and 2%–10% melamine cyanurate.

This invention discloses a sustained-release granule of traditional Chinese medicine and its preparation method, relating to the field of traditional Chinese medicine preparation technology. It is prepared from the following materials in parts: 100-600 parts of active extract of traditional Chinese medicine, 50-450 parts of beeswax, 20-400 parts of aralia elata gelatin, 22-400 parts of modified gelatin, 15-50 parts of polyphosphate ester, 20-220 parts of sepiolite, 10-120 parts of ethyl cellulose aqueous dispersion and 5-30 parts of calcium phosphate salt. This invention uses beeswax as a hydrophobic sustained-release barrier, which can effectively inhibit the rapid dissolution of drugs in the early stage, avoiding gastrointestinal irritation and drug efficacy fluctuations caused by a sudden increase in blood drug concentration after administration. Combined with a hydrophilic gel skeleton composed of aralia elata and modified gelatin, it slowly swells and erodes upon contact with gastrointestinal fluid, achieving a stable release of drugs in the early and middle stages. At the same time, ethyl cellulose aqueous dispersion forms a dense hydrophobic coating film, which precisely controls the drug release rate in the later stage. The multiple sustained-release mechanisms work together to overcome the poor adaptability of traditional systems and effectively avoid the problems of sudden release, delayed release, and incomplete drug release.

The utility model discloses a kind of ammonium polyphosphate calcium preparation is used neutralization reaction device, including box and supporting leg, discharge assembly is installed on the box, the discharge assembly includes outlet pipe and valve, separation assembly is installed on the box, the separation assembly includes inner cylinder and support plate, purification assembly is installed on the box, the purification assembly includes cover and activated carbon plate, stirring assembly is installed on the box, the stirring assembly includes motor and rotating rod, flow guide mechanism is installed on the inner cylinder, the neutralization reaction device that this ammonium polyphosphate calcium preparation can dissipate the heat generated by neutralization reaction, avoid because temperature is too high and causes ammonium salt decomposition ammonia gas, avoid raw material waste, and it is favorable to guarantee the thoroughness of neutralization reaction, raw material generates up and down and horizontal flow in the inside of inner cylinder, so that raw material is rapidly and fully mixed evenly, improve the speed of ammonium polyphosphate calcium neutralization reaction, suitable for the neutralization reaction of ammonium polyphosphate calcium preparation.

The present application relates to the technical field of polycarbonate plate, and particularly relates to a weather-resistant flame-retardant polycarbonate plate and a preparation process thereof. The preparation process of the weather-resistant flame-retardant polycarbonate plate comprises the following steps: preparing titanium dioxide composite material; preparing polyphosphate flame retardant; preparing modifier; preparing modified nanosilica; and preparing polycarbonate plate. In the present application, p-methyl phenyl phosphoric dichloride is reacted with 4,4-dihydroxy diphenyl sulfone and hydroxyl-terminated polydimethylsiloxane to obtain polyphosphate flame retardant. After the polyphosphate flame retardant is added into polycarbonate, the anti-ultraviolet aging performance of the polycarbonate plate can be improved in cooperation with the titanium dioxide composite material. In addition, the polyphosphate is decomposed to generate phosphorus-oxygen active groups under heat, so as to capture combustion chain reaction free radicals. Meanwhile, the siloxane component and phosphorus element catalyze the formation of carbon layer in cooperation, so as to construct a dense heat-resistant barrier layer, thereby effectively improving the flame-retardant performance of the polycarbonate plate.

According to some demonstrative embodiments, there is provided herein a fertilizer granule comprising: a core comprising at least one fertilizer; a coating layer covering the core, the coating layer comprising a polyphosphate; and wherein the polyphosphate comprises a sodium or ammonium based cation having a chain length of 10 or more units.

This invention discloses a waterproof and washable coating and its preparation method, belonging to the field of coating technology. The waterproof and washable coating comprises the following raw materials: styrene, butyl acrylate, methacrylic acid, ammonium persulfate, a polymerizable emulsifier, sodium bicarbonate, deionized water, modified nano-silica, polyphosphate, defoamer, and polyvinyl alcohol. The polymerizable emulsifier is first reacted with maleic anhydride and brominated hexaethylene glycol to generate an esterification product, then reacted with 1-dodecyldimethylsilanol to generate intermediate 2, and finally reacted with 3-(dodecylamino)-1-propanesulfonic acid to obtain the polymerizable emulsifier. The waterproof and washable coating prepared by this invention exhibits excellent mechanical properties, waterproofness, and washability.

This invention discloses an oral care composition comprising hyaluronic acid and polyphosphate and its application. The oral care composition includes: 1) hyaluronic acid; 2) polyphosphate; and 3) an orally acceptable carrier. The polyphosphate is one or a combination of two or more of pyrophosphate, tripolyphosphate, or hexametaphosphate. The hyaluronic acid comprises one or a combination of two or more of high molecular weight hyaluronic acid, medium molecular weight hyaluronic acid, and low molecular weight hyaluronic acid. The pH value of the oral care composition is 6-9. The hyaluronic acid in this oral care composition can improve the stability of the polyphosphate in the composition, and hyaluronic acid also has the effect of improving the stability of the polyphosphate in the oral care composition. Moreover, the oral care composition comprising hyaluronic acid and polyphosphate of this invention also has a good effect on teeth whitening.

Disclosed is a technology where, when a current collector containing Al is used in an aqueous battery, elution of Al from the current collector into an aqueous electrolyte solution can be suppressed. The aqueous battery of the present disclosure includes a positive electrode, an aqueous electrolyte solution, and a negative electrode. One or both of the positive electrode and the negative electrode has / have a current collector containing Al. The current collector is in contact with the aqueous electrolyte solution. The aqueous electrolyte solution contains water, potassium polyphosphate dissolved in the water, and a silicic acid salt dissolved in the water.

This invention discloses a composite foam material filled with biocrystal powder, its preparation method, and its application in a sleep-aid pillow, belonging to the field of functional filler technology and patent classification number C08K3 / 34. The method includes first depositing polyphosphate ammonium onto the surface of melamine-formaldehyde prepolymer and acidified expandable graphite, followed by curing to obtain an intumescent flame retardant; synthesizing a castor oil-based flexible segment prepolymer via transesterification; and modifying aluminosilicate fibers with a silane coupling agent. The polyol, flexible prepolymer, biocrystal powder, flame retardant, modified fibers, catalyst, etc., are mixed and foamed with polyisocyanate to obtain the composite material. This invention achieves high-efficiency flame retardancy through the synergistic effect of the flame retardant's microscopic carbon source-acid source-gas source; the castor oil-based flexible segments impart high resilience and sustained compression recovery to the material; and the biocrystal powder helps improve sleep quality, thus combining flame retardancy, high resilience, and sleep-aiding functions.

This invention discloses a surface-treatment-free, ultra-heavyweight anti-corrosion coating and its preparation method, comprising component A, component B, and component C. Component A includes hydrogenated bisphenol A type epoxy resin, polyaspartic acid ester resin, hyperbranched polysiloxane-phosphate-catechol terpolymer, polyaniline / polypyrrole / graphene oxide / molybdate quaternary hybrid material, graphene nanosheets, nano zinc oxide, and fumed silica. Component B includes polyetheramine, alicyclic amine, modified mercaptoacetate, melamine polyphosphate, and aluminum hydroxide. Component C includes fluorocarbon surfactant, polyether-modified polysiloxane defoamer, and isothiazolinone derivative. This coating requires no surface pretreatment such as sandblasting, grinding, or phosphating, and can be directly applied under harsh conditions such as rust, humidity, underwater, and low temperature. It is suitable for various substrates such as metal, glass, and ceramics, and has comprehensive performance characteristics including adhesion ≥15MPa, salt spray resistance >20000h, flame retardancy V-0 rating, and zero VOC.

An inorganic phosphorus recovery system and method for residual sludge concentrate belongs to the fields of wastewater treatment, low carbon and resource regeneration. An anaerobic phosphorus release tank (1) is sequentially connected to a sludge thickening tank (2) and a sludge dewatering workshop (3). Residual sludge enters the anaerobic phosphorus release tank for anaerobic phosphorus release, followed by sludge thickening. The supernatant obtained from the thickening is transported to a chemical phosphorus recovery tank (4). The thickened sludge then enters the sludge dewatering workshop for further dewatering. The dewatered liquid produced from the dewatering is sent to the chemical phosphorus recovery tank for phosphorus recovery. When the chemical phosphorus recovery tank is full, phosphorus removal chemicals are added to the tank for a full reaction, resulting in the precipitation of inorganic phosphorus precipitate. The inorganic phosphorus precipitate is then cleaned and separated using a screw conveyor to complete the phosphorus recovery. This method fully utilizes the characteristic of polyphosphate-accumulating bacteria releasing phosphorus under anaerobic conditions, reducing energy loss. The sludge thickening supernatant and the dewatered liquid are collected in the chemical phosphorus recovery tank, facilitating the recovery and utilization of phosphorus from wastewater.

This invention provides flame-retardant polystyrene and its preparation method, relating to the field of polymer materials technology. The flame-retardant polystyrene comprises the following components in parts by weight: 60-85 parts polystyrene, 15-25 parts composite flame retardant, 5-15 parts toughening agent, 0.1-0.5 parts antioxidant, and 0.2-1.0 parts lubricant; the composite flame retardant comprises phosphate ester flame retardants, phosphonate flame retardants, and melamine polyphosphate in a mass ratio of 1:1-3:2-5. This polystyrene exhibits excellent flame-retardant properties.

The invention discloses a flame-retardant reinforced polypropylene composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The composite material is prepared from synergistically modified polypropylene matrix resin, 2, 6-dihydroxy triptycene, melamine polyphosphate, expanded graphite, an antioxidant, a lubricant and a compatilizer. According to the synergistically modified polypropylene matrix resin, polypropylene is subjected to phosphine oxide group-containing grafting modification and further subjected to a ring-opening coupling reaction with cyclic carbonate, and meanwhile, a diurea structure is introduced to construct a phosphorus-carbonate-urea ternary coupling network. Through synergistic modification of the structure and the action of small organic molecules, the flame retardant property, the mechanical property and the thermal stability of the material are effectively improved, the synergistic effect of flame retardance and enhancement is achieved, and the material is suitable for the application field with high requirements for the flame retardant property.

This invention discloses a method for cultivating aerobic granular sludge using simulated pig farm wastewater and its application. High-concentration simulated pig farm wastewater is selected as raw material, starting with flocculent activated sludge. The aerobic and anoxic environments required by nitrifying bacteria, polyphosphate-accumulating bacteria, and denitrifying bacteria are balanced through the addition of anaerobic retention and intermittent aeration. During the cultivation process, activated carbon, a nucleating agent with higher porosity and specific surface area, is added to promote the attachment and aggregation of the flocculent activated sludge. Mature aerobic granular sludge can be cultivated in approximately 70 days. Furthermore, the cultivated aerobic granular sludge exhibits rich microbial content, good settling performance, and stable sludge structure, demonstrating strong application potential in the field of pig farm wastewater treatment.

This invention discloses a circulating high-efficiency denitrification bioreactor. The bioreactor is filled with activated sludge containing denitrifying bacteria, polyphosphate-accumulating bacteria, nitrifying bacteria, and aerobic bacteria. The bioreactor includes: an anoxic module; an anaerobic module; and an aerobic sedimentation coupling module for separating clarified water, activated sludge, and exhaust gas. The anoxic module, anaerobic module, and aerobic sedimentation coupling module are sequentially connected. Both the anoxic and anaerobic modules are equipped with agitators for stirring the activated sludge. The activated sludge from the aerobic sedimentation coupling module is returned to the anoxic module via an aerobic exhaust gas power component. The bioreactor of this invention can efficiently treat wastewater and has the characteristics of simple structure, small size, and low cost.

This invention discloses a healing-type waterborne acrylic anti-corrosion coating for steel structures and its preparation method, belonging to the field of anti-corrosion coating technology. It comprises a silane-coupled modified waterborne acrylic core-shell emulsion and a waterborne epoxy ester-acrylic hybrid emulsion; Diels-Alder reversible crosslinking microcapsules, urea-formaldehyde resin-coated healing agent microcapsules, an intumescent flame-retardant system consisting of ammonium polyphosphate, dipentaerythritol, melamine polyphosphate, organically modified halloysite nanotubes, titanate-modified hollow glass microspheres, layered bimetallic hydroxides, and functional additives including phosphate-modified dispersant, silicone defoamer, associative polyurethane thickener, and 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate; the solvent is deionized water. When microcracks develop in the coating during construction or service, solar radiation or mild heating can trigger a reverse Diels-Alder reaction, causing the healing agent to flow and fill the cracks, and re-crosslinking upon cooling. Compared with existing waterborne acrylic fire-retardant coatings, the salt spray test life is expected to be extended by more than 50%.