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28 results about "Precipitated sulphur" patented technology

Water-based single-component super-amphiphobic refrigeration coating, coating and preparation method thereof

The invention discloses a water-based single-component super-amphiphobic refrigeration coating, a coating and a preparation method of the coating, and relates to the technical field of coatings. 20-35 parts of a second filler; 5-10 parts of a third filler; 20-35 parts of a film-forming substance, 1-9 parts of an auxiliary agent and 3-50 parts of water; the first filler comprises fluorine-containing silane modified fumed silica; the second filler comprises at least one of long-chain silane modified precipitated barium sulfate, long-chain silane modified calcium carbonate and long-chain silane modified hollow glass beads; the third filler comprises an infrared emission filler treated by an organic silicon modifier. By modifying the filler, the purposes of stable dispersion and functional synergy of low-surface-energy substances and high-proportion inorganic nano filler in a water-based system are achieved.
Owner:CHINA SOUTHWEST ARCHITECTURAL DESIGN & RES INST CORP LTD

Production and preparation process of heavy anti-corrosion waterborne epoxy primer applicable to high-salt and high-humidity environment

The invention discloses a production and preparation process of a heavy-duty water-based epoxy primer applicable to a high-salt and high-humidity environment, and relates to the technical field of production of water-based epoxy primers. Comprising the following raw materials in parts by mass: 30-50 parts of bisphenol A type water-borne epoxy resin emulsion, 10-20 parts of a curing agent T-31, 3.5-5 parts of a reinforced anti-settling agent, 8-12 parts of zinc phosphate, 5-8 parts of aluminum triphosphate, 10-15 parts of precipitated barium sulphate, 3-6 parts of silica powder, 0.8-1.2 parts of a sodium polyacrylate dispersing agent, 0.4-0.8 part of an organic silicon defoaming agent and 0.3-0.7 part of an acrylate flatting agent. And 0.6-1 part of a polyurethane thickening agent. The bentonite and the modified zirconium phosphate silicate powder in the reinforced anti-settling agent can improve the microstructure of the primer in a primer system, so that a coating is more compact and can be conveniently applied to a high-salt and high-humidity environment, and the salt spray resistance of the waterborne epoxy primer is enhanced.
Owner:威海佳美化工有限公司

Method for cooperatively recovering sulfuric acid and copper-zinc in copper strip washing waste acid

This invention provides a method for the synergistic recovery of sulfuric acid and copper and zinc from waste acid from copper strip washing, comprising the following steps: S1, waste acid pretreatment; S2, novel bipolar membrane electrodialysis separation; S3, copper-targeted precipitation separation: adding a copper-targeted precipitant to the heavy metal concentrate to form a stable precipitate, followed by filtration and washing to obtain a copper-enriched precipitate; S4, zinc sulfate preparation: adjusting the pH of the filtrate after copper precipitation separation and removing reducing impurities, then evaporating and concentrating to a solution density of 1.4-1.5 g / cm³, cooling and crystallizing, and centrifuging to obtain zinc sulfate crystals, with the mother liquor returned to the evaporation and concentration unit for recycling. This method can achieve efficient recovery and recycling of sulfuric acid, while simultaneously achieving precise separation of copper and zinc ions and the preparation of high-value products, significantly improving the resource utilization efficiency of waste acid and reducing treatment costs.
Owner:安徽铜冠产业技术研究院有限责任公司

Composition for breathable waterproof coating, coating and preparation method thereof

PendingCN121825336APermeation barrierSolve the waterproof problemCoatingsEmulsionCarbon nanotube
The invention discloses a composition for a breathable waterproof coating, the coating and a preparation method of the coating, belongs to the technical field of building coatings, and aims to solve the problem that a coating is bubbled and stripped due to low water vapor permeability of an existing waterproof coating. The composition is prepared from the following raw materials in parts by weight: 35 to 45 parts of acrylic emulsion, 0.1 to 0.3 part of cross-linking agent, 5 to 10 parts of diatomite, 0.2 to 0.5 part of wetting agent and 0.1 to 0.3 part of carbon nano tube. The preparation method comprises the step of sequentially dispersing and mixing the acrylic emulsion, the defoaming agent, the cross-linking agent, the water, the preservative, the diatomite, the heavy calcium carbonate, the wetting agent, the carbon nano tube, the precipitated barium sulfate and other raw materials at a specific rotating speed. The coating keeps excellent waterproof performance, tensile strength and flexibility, meanwhile, the water vapor permeability is remarkably improved, and the coating has good constructability and durability and is suitable for building waterproof engineering with high requirements for air permeability.
Owner:SHANGHAI BAOLIJIA NEW MATERIAL CO LTD

Anticorrosive coating for plastic-coated composite steel pipe and preparation method thereof

This invention discloses an anti-corrosion coating for plastic-coated composite steel pipes and its preparation method, relating to the field of coating preparation technology. The coating comprises the following raw materials in parts by weight: 48-52 parts of E-12 epoxy resin, 12-16 parts of E-20 epoxy resin, 15-17 parts of low-temperature curing agent, 0.6-1.0 parts of leveling agent, 0.2-0.4 parts of defoamer, 8-10 parts of precipitated barium sulfate, 2-4 parts of mica powder, and 0.2-0.4 parts of fumed silica. The low-temperature curing agent used in this invention is obtained by mixing aromatic amine compounds, fatty acid esters, and imidazole-containing compounds in a certain mass ratio. By combining the low-temperature curing agent with other raw materials, the roller coating temperature of the anti-corrosion coating on the inner wall of the plastic-coated composite steel pipe is reduced to 150-160℃, and curing can be completed quickly at 160-165℃, reducing the processing temperature. The coating exhibits high storage stability and good anti-corrosion performance.
Owner:XINJIANG LINGHANG PIPE TECH CO LTD

Method for preparing lithium compound

According to one embodiment of the present invention, provided is a method for preparing a lithium compound, the method comprising: a step for adding sulfuric acid to a raw material containing lithium and magnesium to leach out lithium and thereby obtain a sulfuric acid leachate; and a step for heating the sulfuric acid leachate to precipitate magnesium sulfate and thereby remove magnesium.
Owner:POSCO HLDG INC

Stain-resistant internal olefine acid finish paint coating material for refrigerated container and preparation method of stain-resistant internal olefine acid finish paint coating material

PendingCN121319722ACoatingsPolymer sciencePrecipitated sulphur
The invention relates to the technical field of paint, in particular to a stain-resistant internal olefine acid finish paint coating material for a refrigerated container and a preparation method of the stain-resistant internal olefine acid finish paint coating material. Comprising the following preparation raw materials: deionized water, a pH regulator, a high-hydrophobic dispersant, a polyether siloxane defoaming agent containing hydrophobic particles, titanium dioxide, 3000-mesh precipitated barium sulfate, a hydrophobic modified acrylic emulsion, an environment-friendly coalescing agent, a bactericide, a mildew preventive, a high-efficiency emulsion defoaming agent with good compatibility of a polyether siloxane technology, and a non-silicon wetting agent. According to the environment-friendly water-based paint, through the synergistic effect of the super-hydrophobic dispersing agent, the hydrophobic emulsion and the optimized wetting system, the stain resistance close to that of a solvent-based paint is achieved while the water-based environment-friendly advantage is kept; the appearance problem of the refrigerated container is effectively solved.
Owner:COSCO KANSAI PAINT SHANGHAI CO LTD

Preparation method and application of coiled material powder coating for soilless planting pool

The invention relates to the technical field of powder coatings, in particular to a preparation method and application of a coiled material powder coating for a soilless planting pool, and aims at solving the technical problems that an existing coating is poor in hydrolysis resistance, harmful substances are separated out and the like. The preparation method comprises the following steps: pre-mixing high-hydrolysis-resistance polyester resin, a curing agent, a hydrolysis-resistance stabilizer, a hydrolysis-resistance metal substrate adhesion promoter, a pigment, precipitated barium sulfate, active silica powder, a leveling agent, a degassing agent, a wetting dispersant and a wax aid in a high-speed mixer, feeding into a double-screw extruder, melting and mixing, and extruding, tabletting by a tabletting machine, cooling, crushing, and feeding into an ACM mill for fine crushing, so as to obtain a coiled material powder coating; the coiled material powder coating not only can meet the requirements of a metal coiled material pre-coating process, but also can tolerate long-term soaking of a hydroponic nutrient solution and an alkaline cleaning agent, and meanwhile, all components meet the hygienic standards of food contact materials and drinking water, so that the special powder coating is safe, environment-friendly and durable.
Owner:GUANGDONG RUIZHI HIGH-TECH CO LTD

Phosphorus-free salt-fog-resistant 1000h environmental protection epoxy coating and preparation method thereof

This application relates to the field of coating compositions, specifically disclosing an environmentally friendly epoxy coating that is phosphorus-free and resistant to salt spray for 1000 hours and its preparation method, comprising component A and component B, including the following raw materials in parts by weight: epoxy resin 35-40 parts, n-butanol 2-2.5 parts, xylene 5-5.5 parts, dispersant 0.1-0.5 parts, iron oxide red 10-12 parts, heavy calcium carbonate 4-6 parts, zinc oxide 2-4 parts, rust-inhibiting silica powder 4-6 parts, kaolin 4-6 parts, talc powder 3-4 parts, rust-inhibiting pigment 7-8 parts, precipitated barium sulfate 12-15 parts, petroleum resin 4-5 parts, leveling agent 0.02-0.06 parts; curing agent 12-15 parts, n-butanol 1-2 parts, xylene 1-1.5 parts, dispersant 1-3 parts, mica iron oxide 0.4-0.6 parts; talc powder including one or more of calcium ion exchange talc powder, cerium ion exchange talc powder, and lanthanum ion exchange talc powder. The coating in this application is environmentally friendly, phosphorus-free, and has good salt spray resistance.
Owner:JIANGSU HAOYUE PAINT

Dry powder thin coating type coating compatible with dark pigment, preparation method and preparation equipment

The invention provides a dry powder thin coating type coating compatible with a dark pigment as well as a preparation method and preparation equipment of the dry powder thin coating type coating. The coating comprises the following components in parts by mass: 35-45 parts of modified latex powder, 10-20 parts of modified talcum powder, 20-30 parts of modified calcium powder, 5-10 parts of modified wollastonite, 5-15 parts of modified precipitated barium sulfate, 5-15 parts of modified titanium dioxide, 5-10 parts of modified quartz powder, 1-5 parts of nano magnesium oxide, 0.5-2 parts of nano zinc oxide, 0.5-1 part of a flatting agent, 1.5-2.5 parts of sodium dodecyl benzene sulfonate, 0.8-1.2 parts of sodium lignosulfonate, 0.8-1.6 parts of sodium chloride, 1-2 parts of cellulose and 0.3-0.5 part of a defoaming agent. The modified talcum powder, the modified calcium powder, the modified wollastonite, the modified precipitated barium sulfate, the modified titanium dioxide and the modified quartz powder are respectively obtained by modifying with a modifier. The coating can overcome the defects of traces and floating caused by mixing of an inorganic coating and a dark pigment.
Owner:王聚会

Pretreatment and resource recovery method of ardealite leacheate

The invention belongs to the technical field of ardealite resource utilization, and particularly relates to a pretreatment and resource recovery method of ardealite leacheate. The pretreatment method comprises the following steps: carrying out rough filtration and flocculating settling treatment on the ardealite leacheate, then adding an alkaline precipitant to adjust the pH value to 9.5-11.5, stirring to carry out precipitation reaction, then adding a reducing agent and / or a vulcanizing agent, stirring to carry out reduction and / or vulcanization reaction, and filtering to remove precipitated floc and colloid after the reaction is completed; and carrying out adsorption and fine removal on the obtained filtrate to remove residual dissolved heavy metals so as to obtain the pretreated phosphogypsum leacheate. According to the method, traditional precipitation, vulcanization, adsorption and other methods are organically integrated, various metal impurities and interference ions easy to co-precipitate in the ardealite leacheate are efficiently and selectively removed, and subsequent recycling (F / P recovery) coupling is facilitated.
Owner:SOUTH CHINA UNIV OF TECH

Bio-based modified alkyd resin odorless coating and preparation method thereof

The invention discloses a bio-based modified alkyd resin odorless coating and a preparation method thereof, and belongs to the technical field of coatings, and the bio-based modified alkyd resin odorless coating is characterized by being prepared from the following raw materials in parts by weight: 55-70 parts of bio-based modified alkyd resin, 10-20 parts of rutile titanium dioxide and 10-20 parts of precipitated barium sulphate. The coating is prepared from the following raw materials in parts by weight: 6-12 parts of an odor removing solvent, 0.2-0.5 part of fumed silica, 0.3-0.5 part of a wetting dispersant, 0.3-0.6 part of a high-efficiency composite drier and 0.25-0.45 part of an anti-skinning agent. The coating is lasting in odor removal effect and low in VOCs discharge amount, the obtained coating has good adhesive force and flexibility, high hardness, good acid resistance and excellent wear resistance, meanwhile, the coating has good weather resistance and construction performance, the development trend of environment-friendly coatings is met, the industry technology blank is effectively filled up, and the market requirement is met.
Owner:JIANGSU ZHONGJIANG TAIE BIOBASED MATERIALS CO LTD

Hydrogen production from hydrogen sulfide

PendingUS20260145932A1Sulfur preparation/purificationHydrogen productionPtru catalystPrecipitated sulphur
A method of producing hydrogen gas and separating sulfur from hydrogen sulfide including contacting the hydrogen sulfide with a catalyst in an aqueous solution to form a hydrogen gas and a reaction solution including sulfur; mixing the reaction solution and a sulfur solvent to form a sulfur solution; separating the sulfur solution into a first stream including the aqueous solution and a second stream including sulfur; and precipitating sulfur from the second stream.
Owner:BAKER HUGHES OILFIELD OPERATIONS LLC

Method for efficiently preparing precipitated barium sulfate

The invention relates to the technical field of chemical engineering, and discloses a method for efficiently preparing precipitated barium sulfate. The method comprises the following steps: by taking witherite raw ore as a raw material, crushing, performing targeted impurity removal, and calcining and activating to obtain witherite powder; then carrying out surface treatment by using a specific modifier to form an activation system; and carrying out a speed-controlled reaction with a sulfuric acid solution, and carrying out post-treatment to obtain precipitated barium sulfate. The modifier is prepared through a reaction of gamma-glycidyl ether oxypropyl trimethoxy silane, double-end amino polyethylene glycol and nicotinic acid, a siloxane group of the modifier can be anchored to the surface of powder, a long chain of polyethylene glycol provides steric hindrance, and a pyridine ring can reduce impurity adsorption. The precipitated barium sulfate prepared by the method is high in purity, low in impurity content, good in dispersion stability and low in process energy consumption, used equipment is conventional equipment in the field of chemical engineering, industrial production is easy to realize after operation adaptation of a solvent system and a purification unit, and application requirements in the high-end field can be met.
Owner:CHONGQING LUYU MINING DEV CO LTD

Water-based acrylic coating with early water resistance as well as preparation method and application of water-based acrylic coating

ActiveCN121950124ACoatingsPhysical chemistryAcrylic coating
The invention provides a water-based acrylic coating with early water resistance as well as a preparation method and application thereof, and relates to the technical field of water-based coatings. The coating is prepared from the following raw materials in parts by mass: 50 to 60 parts of waterborne acrylic emulsion, 10 to 20 parts of deionized water, 8 to 12 parts of surface modified coarse-grained rutile titanium dioxide, 5 to 10 parts of surface modified fine-grained rutile titanium dioxide, 6 to 10 parts of precipitated barium sulfate, 0.2 to 0.5 part of dispersing agent, 0.3 to 0.5 part of defoaming agent and 1.5 to 2.5 parts of coalescing agent, 0.2 to 0.5 part by mass of a thickening agent, 0.2 to 0.5 part by mass of a leveling agent and 0.05 to 0.15 part by mass of ammonia water. KH-570 and A-151 are compounded with a silane coupling agent to perform synergistic surface modification on rutile titanium dioxide of different particle sizes, and a double-particle-size pigment step-by-step dispersion preparation process is combined, so that the synergistic improvement of the coating film density and the interface hydrophobicity is realized, the early water resistance of the water-based acrylic coating is remarkably improved, and the water-based acrylic coating has a wide application prospect.
Owner:BEIJING WAN YUN HUA RUI CHEM CO LTD

Dry powder thin-coating type paint compatible with light-color pigment and preparation method of dry powder thin-coating type paint

The invention provides a dry powder thin coating type coating compatible with a light-color pigment and a preparation method of the dry powder thin coating type coating. The waterproof paint is prepared from 30-45 parts of modified latex powder, 8-20 parts of talcum powder, 18-30 parts of calcium powder, 4-15 parts of wollastonite, 5-15 parts of precipitated barium sulfate, 5-18 parts of titanium dioxide, 5-13 parts of quartz powder, 1-5 parts of nano magnesium oxide, 0.5-2 parts of zinc oxide, 1.5-2.5 parts of sodium dodecyl benzene sulfonate, 0.8-1.2 parts of sodium lignosulphonate, 0.8-1.6 parts of sodium chloride, 1-2 parts of cellulose and 0.3-0.5 part of a defoaming agent. The sum of the total parts by mass of the modified latex powder, the talcum powder, the calcium powder, the wollastonite, the precipitated barium sulphate, the titanium dioxide and the quartz powder is 100, and the modified latex powder is prepared by mixing ash calcium powder, superfine mineral powder and latex powder. The coating can overcome the defects of traces and color floating when an inorganic coating is mixed with a colored pigment.
Owner:ZHENGZHOU JUYUAN NEW MATERIAL TECH CO LTD +1

Production and preparation process of heavy-duty waterborne epoxy primer suitable for high-salt and high-humidity environment

The application discloses a production and preparation process of a heavy-duty water-based epoxy primer suitable for a high-salt and high-humidity environment, and relates to the technical field of water-based epoxy primer production. The raw materials are as follows: 30-50 parts of bisphenol A type water-based epoxy resin emulsion, 10-20 parts of a curing agent T-31, 3.5-5 parts of a reinforced anti-settling agent, 8-12 parts of zinc phosphate, 5-8 parts of aluminum tripolyphosphate, 10-15 parts of precipitated barium sulfate, 3-6 parts of silicon powder, 0.8-1.2 parts of a polyacrylic acid sodium salt dispersing agent, 0.4-0.8 parts of an organic silicon defoaming agent, 0.3-0.7 parts of an acrylic ester leveling agent and 0.6-1 part of a polyurethane thickening agent. The bentonite in the reinforced anti-settling agent and the modified phosphosilicate zirconium powder can improve the microstructure of the primer system, the coating is more compact, the primer can be conveniently applied to a high-salt and high-humidity environment, and the salt mist resistance of the water-based epoxy primer is enhanced.
Owner:威海佳美化工有限公司

Resourceful treatment and recovery method of high-concentration sulfate wastewater

The invention discloses a resourceful treatment and recovery method for high-concentration sulfate wastewater, and belongs to the technical field of sewage treatment. The method comprises the following steps: after being homogenized by a regulating tank, wastewater sequentially enters a coagulative precipitation tank I and an air floatation tank to remove suspended solids and colloids; lime milk is added into the primary sedimentation tank to precipitate most sulfate radicals, and a gypsum product is recycled; enabling the supernate to enter an advanced oxidation pond, and degrading organic matters by adopting alkali-activated sodium persulfate; the effluent passes through a secondary sedimentation tank, barium hydroxide is added to deeply precipitate sulfate radicals, and a high-purity barium sulfate product is recovered; and finally, adding sodium carbonate into the third-stage sedimentation tank to remove residual calcium ions, wherein the obtained high-quality effluent can be used as a recycled water resource. According to the method, graded conversion of sulfate radicals and collaborative recovery of gypsum and barium sulfate are realized through a cascade process of lime milk precipitation, advanced oxidation, barium salt precipitation and effluent reuse, and the method has the comprehensive advantages of low treatment cost, high product purity and environmental friendliness.
Owner:JIANGSU YANGTZE RIVER DELTA ENVIRONMENTAL SCI & TECH RES INST CO LTD

Preparation method for producing high-purity ammonium tetramolybdate from low-grade molybdenite

The invention belongs to the technical field of production and preparation of ammonium tetramolybdate, and particularly relates to a preparation method for producing high-purity ammonium tetramolybdate by utilizing low-grade molybdenite. According to the method, the surface of molybdenite is selectively oxidized and activated under the mild condition, and meanwhile, ammonium ions are used for inhibiting dissolution of associated metal sulfide. A collaborative purification strategy of lime milk sulfur fixation-carbon dioxide carbonation is adopted, sulfate radicals are efficiently precipitated with low-cost lime milk, ammonia gas is synchronously recovered, the pH is precisely regulated and controlled through the mild acidification effect of carbon dioxide, and residual calcium, magnesium and heavy metal ions are deeply removed in the form of carbonate. And finally, by virtue of the specific chelation of the aminophosphonic acid functionalized mesoporous adsorbent on heavy metal ions and the membrane separation and resource recycling of an electrodialysis-mother liquor circulating system on foreign ions, the purity of the ammonium tetramolybdate product is ensured, and meanwhile, a production process which is free of roasting and high in resource utilization rate is formed.
Owner:ANQING YUETONG MOLYBDENUM CO LTD

A single-component water-based paint dedicated to a house building container and a land transportation container and a preparation method thereof

PendingCN122445259ASide chainLand transport
This invention provides a single-component waterborne coating specifically for residential and land transport containers and its preparation method. The coating comprises the following components, with the following mass percentages: 35-45 parts modified waterborne self-drying alkyd resin; 5-10 parts titanium dioxide; 0.2-0.5 parts carbon black; 10-20 parts precipitated barium sulfate; 0.4-0.8 parts dispersant; 0.3-0.6 parts wetting agent; 0.1-0.3 parts defoamer, at least part of which is added during the paint mixing stage; 0.5-1.2 parts drier; 0.5-1.0 parts flash rust inhibitor; 0.8-1.5 parts alkali-swellable rheology modifier; 5-8 parts 5% LT water-soluble agent; and 25-35 parts deionized oil. This invention effectively solves the problems of slow drying speed, insufficient initial water resistance and adhesion, and difficulty in achieving both low-temperature film formation and long-term anti-corrosion performance in existing water-based coatings for container applications by using side-chain esterification modification of long-oil water-based alkyd resin with a specific structure, optimizing the additive system and combining it with a refined preparation process.
Owner:FOSHAN TUJIZHI ENVIRONMENTAL PROTECTION NEW MATERIAL CO LTD

A method for preparing a coiled material powder coating for soilless planting pools and application thereof

This invention relates to the field of powder coating technology, specifically to a method for preparing and applying a roll-type powder coating for hydroponic planting ponds. It addresses technical problems such as poor hydrolysis resistance and the release of harmful substances in existing coatings. The method involves pre-mixing high-hydrolysis-resistant polyester resin, curing agent, hydrolysis-resistant stabilizer, hydrolysis-resistant metal substrate adhesion promoter, pigment, precipitated barium sulfate, active silica powder, leveling agent, degassing agent, wetting and dispersing agent, and wax additives in a high-speed mixer. The mixture is then fed into a twin-screw extruder for melt mixing and extrusion. The resulting product is then tableted and cooled, pulverized, and finally finely ground in an ACM mill to obtain the roll-type powder coating. This roll-type powder coating meets the requirements of metal roll pre-coating processes, can withstand long-term immersion in hydroponic nutrient solutions and alkaline cleaning agents, and all components comply with food contact materials and drinking water hygiene standards, making it a safe, environmentally friendly, and durable special powder coating.
Owner:GUANGDONG RUIZHI HIGH-TECH CO LTD

Aqueous single-component superamphiphobic refrigeration coating, coating and method for its preparation

This invention discloses an aqueous single-component superhydrophobic cooling coating, a coating layer, and a preparation method thereof, relating to the field of coating technology. The cooling coating, by weight, comprises: 2-10 parts of a first filler; 20-35 parts of a second filler; 5-10 parts of a third filler; 20-35 parts of a film-forming substance; 1-9 parts of an additive; and 3-50 parts of water. The first filler comprises fluorinated silane-modified fumed silica; the second filler comprises at least one of long-chain silane-modified precipitated barium sulfate, long-chain silane-modified calcium carbonate, and long-chain silane-modified hollow glass microspheres; and the third filler comprises an infrared emitting filler treated with an organosilicon modifier. This invention achieves stable dispersion and functional synergy of low surface energy substances and a high proportion of inorganic nanofillers in an aqueous system through filler modification.
Owner:CHINA SOUTHWEST ARCHITECTURAL DESIGN & RES INST CORP LTD

System and method for cooperatively treating mine acid wastewater based on multi-stage modified ardealite

The invention relates to the technical field of industrial pollutant cooperative treatment, in particular to a system and method for cooperatively treating mine acid wastewater based on multi-stage modified phosphogypsum. The system comprises a modified ardealite preparation unit, a wastewater treatment unit and a resource recovery unit, and the system converts ardealite into a high-activity material through purification, alkali modification and activation treatment, and is used for gradient purification and resource recovery of wastewater. The invention also provides a wastewater treatment method based on the system, and the method comprises the following steps: adding a modified material according to a ratio, regulating the pH value, and sequentially carrying out neutralization precipitation, deep precipitation, sulfate radical crystallization and residue solidification to realize efficient purification of acidic wastewater and resource utilization of byproducts. According to the method, waste is treated by waste, the problems of large sludge amount, difficult removal of sulfate radicals and phosphogypsum stockpiling pollution in a traditional treatment technology are solved, the wastewater treatment efficiency and the phosphogypsum utilization rate are improved, the secondary pollution is less, the resource recovery rate is high, and the method has both environmental and economic benefits.
Owner:湖北省地质局第七地质大队

Ceramic non-stick coating material, coating, preparation method of coating and cooking utensil

The invention discloses a ceramic non-stick coating material, a coating, a preparation method of the coating and a cooking utensil, and belongs to the field of kitchen ware. The ceramic non-stick coating material comprises a component A and a component B, the component A comprises silica sol, nano precipitated barium sulfate, whisker silicon, a wear-resistant filler, a non-stick aid, fumed silica, a pigment filler and deionized water, and the component B comprises silicone oil, an aid, a silane composition and an acid catalyst. The ceramic non-stick coating material provided by the invention has the advantages of strong adhesive force, high-temperature non-stick property and excellent wear resistance.
Owner:GD MIDEA ENVIRONMENT APPLIANCES MFG

A single-component self-healing waterproof coating and its preparation method

ActiveCN117659788BSolid waste managementCoatingsPolymer sciencePrecipitated sulphur
This invention relates to the field of coating technology, and proposes a single-component self-healing waterproof coating and its preparation method. The single-component self-healing waterproof coating comprises the following components in parts by weight: 40-50 parts of water-based acrylic emulsion, 0.1-0.4 parts of superdispersant, 0.2-0.5 parts of water-based defoamer, 0.2-0.4 parts of bactericide, 3-5 parts of water-swellable material, 10-15 parts of cement, 10-20 parts of heavy calcium carbonate, 15-20 parts of precipitated barium sulfate, 0.3-0.5 parts of thickener, and 5-10 parts of water; the superdispersant is one or more of Solsperse 20000, Solsperse 27000, and Solsperse 47000. Through the above technical solution, the problem of poor impermeability of existing single-component self-healing waterproof coatings is solved.
Owner:YUANDA HONGYU TANGSHAN WATERPROOF MATERIAL CO LTD

Hydrogen production from hydrogen sulfide cross reference to related applications

PCT designated stageWO2026112655A1Hydrogen separationDispersed particle separationPtru catalystPrecipitated sulphur
A method of producing hydrogen gas and separating sulfur from hydrogen sulfide including contacting the hydrogen sulfide with a catalyst in an aqueous solution to form a hydrogen gas and a reaction solution including sulfur; mixing the reaction solution and a sulfur solvent to form a sulfur solution; separating the sulfur solution into a first stream including the aqueous solution and a second stream including sulfur; and precipitating sulfur from the second stream.
Owner:BAKER HUGHES OILFIELD OPERATIONS LLC

A method for treating pfas in chromium wastewater

PendingCN122344065ASulfate radicalsPrecipitated sulphur
The application relates to the technical field of chromium wastewater treatment, and more specifically to a treatment method for PFAS in chromium wastewater, which comprises the following steps: first, adjusting the pH of the wastewater and adding a reducing agent to reduce hexavalent chromium into trivalent chromium for precipitation removal, and then adding barium salt to precipitate sulfate; then, using a magnetic core-shell adsorption material with surface modified quaternary ammonium groups to selectively adsorb residual chromate and long-chain PFAS under acidic conditions and to perform magnetic separation; then, adjusting the effluent to near neutral, and removing suspended solids through flocculation, primary sedimentation and air flotation; finally, deeply adsorbing short-chain PFAS through acrylic weak alkaline anion exchange resin under near neutral conditions. The application effectively solves the problem of poor selectivity of traditional resin in complex electroplating wastewater by removing competitive anions step by step, realizes efficient removal of long-chain and short-chain PFAS, does not need high-pressure membrane or high-energy consumption degradation technology, has the advantages of low operation cost, simple operation, easy engineering application and recycling of chromium resources.
Owner:ZHONGSHAN SANJIAOZHEN GAOPING SEWAGE TREATMENT CO LTD +1

A temperature-resistant anticorrosive coating for pipelines and a preparation method thereof

The application discloses a kind of pipeline temperature-resistant anticorrosive paint and preparation method thereof, first mixed epoxy resin, additive and mixed solvent are mixed uniformly according to proportion, then titanium dioxide, talcum powder and precipitated barium sulfate are added, and uniformly dispersed, then heat-resistant filler is added and stirred uniformly, to obtain component A;Again, modified hyperbranched amino silicone curing agent and mixed solvent are mixed uniformly according to proportion, to obtain component B;Finally, component A and component B are mixed uniformly to obtain the pipeline temperature-resistant anticorrosive paint.The prepared paint of the application is high solid content, environmentally friendly, can be used for CUI insulation layer pipeline, has excellent temperature resistance and corrosion resistance, and can also be used for outdoor pipeline, has excellent weather resistance and durability.
Owner:CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2