377 results about "Potassium peroxodisulfate" patented technology

The invention belongs to the technical field of high polymer materials and specifically discloses modified chitosan/nanocellulose composite aerogel and a preparation method and application thereof. The preparation method comprises the following steps: letting pretreated chitosan react with a hydrochloric acid solution, adding dithiobispropionate, and reacting to prepare modified chitosan; dissolving modified chitosan with an acetic acid solution, adding nanocellulose and fully reacting; adding potassium peroxodisulfate and uniformly mixing; adding acrylic acid and NaOH solution and fully dissolving; adding a N,N'-methylene bisacrylamide solution to prepare modified chitosan/nanocellulose composite aerogel, and freeze-drying to obtain the aerogel product. The prepared modified chitosan/nanocellulose composite aerogel has efficiency and enhanced adsorptive property, and has a remarkable effect of adsorbing heavy metal Cu<2+> with low concentration. Meanwhile, the preparation technology is simple and has strong operability.

The invention relates to a filtrate loss reducer for high-temperature-resistant oil field drilling fluid, a preparation method of the filtrate loss reducer, and application of a treatment agent. A novel high-temperature-resistant filtrate loss reducer is synthesized by implementing the following steps: adopting lignin, acrylamide and 2-acrylamide-2-methyl propanesulfonate as synthetic monomers; enabling the synthetic monomers to perform graft copolymerization under the initiation of potassium peroxodisulfate, ammonium ferrous sulfate hexahydrate and hydrogen peroxide respectively; adding a crosslinking agent, namely N,N-methylene bisacrylamide to enhance the stabilizing force of the synthetic monomers under high temperature condition. The filtrate loss reducer disclosed by the invention adopts waste materials of a paper-making factory, is extensive in source and low in cost, and can be used for absorbing the excellent viscosity reduction capacity of lignin; the introduced acrylamide and 2-acrylamide-2-methyl propanesulfonate can be used for improving the precipitation capacity at a high temperature; N,N-methylene bisacrylamide is added as the crosslinking agent to ensure that a network structure is formed, the high temperature resistance can be improved, an oil and gas layer can be protected from collapsing, and the service life of an oil well can be prolonged. A product disclosed by the invention is applied to the oil field drilling fluid.

The invention provides a method for preparing absorbent resin by grafting acrylic acid with potato starch. The method comprises the following steps of: neutralizing the acrylic acid with sodium hydroxide or potassium hydroxide to prepare a component I; adding water into the potato starch, stirring, gelatinizing the potato starch, and after cooling the gelatinized potato starch, adding N-N bisacrylamide to prepare a component II; adding water into potassium peroxodisulfate and sodium sulfite to prepare a component III, mixing a half of the component III and the component I to prepare a component IV, and mixing the other half of the component III and the component II to prepare a component V; and mixing the component IV and the component V, reacting the component IV and the component V until no volatile substance is generated, and placing the product at a middle and high temperature for 2 to 5 hours to obtain the absorbent resin. The distilled water absorption rate of the obtained absorbent resin is 300 to 1,200g/g; and the water absorption rate for 5.0 percent NaCl aqueous solution is 35 to 125g/g. A special oxidation-reduction initiator system serves as a core in the method to fulfill the aims of simple production process, low cost and degradable product; the environmentally-friendly absorbent resin can be prepared by grafting the acrylic acid with the potato starch at the normal temperature; and the obtained absorbent resin can be applied to industries, such as agriculture, gardening, medicaments, health and the like.

Provided is a preparation method of water-borne acrylic resin emulsion for wood paint. A mixing monomer and emulsifier are mixed and emulsified to form an emulsified and mixed body, a part of the emulsified and mixed body is put into a reaction still, and initiator and water are added. The reaction still is heated, the rest emulsified and mixed body and initiator I are added dropwise, then initiator II is added, temperature is lowered, cross-linking agent is added for reaction, neutralizer is added, then temperature is lowered and the water-borne acrylic resin emulsion is obtained. The mixing monomer comprises crylic acid, methyl methacrylate, butyl acrylate, crylic acid-beta- hydroxyethyl ester, vinyl acetate and the like, the cross-linking agent comprises acrylamide, diacetone-acryloamide and the like, the neutralizer comprises ammonia water, triethanolamine and the like, the initiator I and the initiator II comprise potassium peroxodisulfate, ammonium persulfate and the like, and the emulsifier comprises OP-10, twain-40 and the like. The water-borne wood paint produced through the water-borne acrylic resin emulsion is environment-friendly, non-toxic, unscented, good in rubbing property, high in hardness, good in water-resisting property, and low in cost, and common film lesions such as bubbles, particles and whitening do not occur easily.

The invention discloses a thickened oil well polymer plugging remover. The plugging remover is prepared from the following materials in percentage by mass: 0.5 to 5.0 percent of gel breaker, 1.0 to 10.0 percent of cleaning agent, 0.1 to 5.0 percent of clay stabilizer, 0.1 to 5.0 percent of iron ion stabilizer, 0.1 to 5.0 percent of surfactant, 0.1 to 5.0 percent of corrosion inhibitor, 0.1 to 5.0 percent of bactericide and the balance of water, wherein the gel breaker is prepared from 30 to 70 percent of gel breaker I and 30 to 70 percent of gel breaker II, the gel breaker I is one or more of ammonium persulfate, sodium thiosulfate, potassium periodate and potassium monopersulfate, and the gel breaker II is one or more of calcium peroxide, potassium peroxodisulfate, sodium periodate and iron sulfide. The thickened oil well polymer plugging remover is suitable for solving the plugging problem caused by a thickened oil well polymer, has a better plugging removal effect than a conventional single oxidizer or single acid liquor, and has the advantages of good plugging removal effect, strong corrosion resistance, long period of validity, safety and the like.

The invention relates to a bi-sulfonate interface initiator and a preparing method thereof. A tertiary amine compound with bi-sulfonate anions and bi-dodecyl is synthesized, and the emulsion function higher than that of a common surfactant is shown; meanwhile, tertiary amine and potassium peroxodisulfate can be subjected to a redox reaction at the normal temperature, cation free radicals are formed on nitrogen atoms and then converted into carbon free radicals at adjacent positions, generating of the free radicals can be repeated, control is flexible, multi-phase concatenation polymerization is achieved, polymerization of styrene and methyl methacrylate and polymerization of styrene and hydroxyethyl acrylate are sequentially triggered on a water/oil interface, and a multi-segmented copolymer is obtained. An experiment proves that the feeding ratio of monomer and the composition ratio of the copolymer are quite coincident, it shows that the triggering efficiency of the initiator is high, the polymerization reaction in the mode is moderate and controllable in condition and low in energy consumption, other organic solvents and emulsifiers are avoided, the product is pure, and the requirements of green chemistry are completely met.

The invention discloses a making method of carbon-based high-valent silver molecular crystal battery, which comprises the following steps: dissolving silver nitrate into pure water; stirring; placing the active carbon in the silver nitrate solution; adsorbing; filtering; drying the active carbon; placing the potassium peroxodisulfate or sodium peroxodisulfate as oxidizer into distilled water; adding sodium hydroxide; diluting; heating; stirring to react with dried active carbon; insulating; filtering; washing four times through pure water; obtaining the product with Ag4O4 distributed evenly on the surface of active carbon; displaying stronger chemical adsorbing ability and chemical reactivity; reinforcing the purifying capacity of organic toxic and harmful material absorbed by active charcoal.

The invention discloses a carbon-coated porous manganese monoxide core-shell structure composite material and a preparation method and an application thereof. The preparation method comprises the following steps: firstly, with styrene as a carbon source and potassium peroxodisulfate as an initiator, carrying out soap-free emulsion polymerization to obtain a polystyrene microsphere template, and then carrying out surface modification on microspheres with concentrated sulfuric acid; with common manganese sulfate as a manganese source, preparing manganese carbonate particles embedded with a plurality of polystyrene microspheres by a liquid phase deposition method, and then adding a shell layer material to coat the particle surfaces with a carbon layer; and finally, carrying out high-temperature carbonization to obtain a novel carbon-coated porous manganese monoxide core-shell structure composite material. The composite material is spherical particles with uneven surfaces; and the spherical particles comprise manganese monoxide grains, multi-scale holes and the carbon layer. The special structure with the carbon layer and the multi-scale holes can play a role in buffering volume expansion of manganese monoxide in the repeated charging and discharging processes. The composite material disclosed by the invention has excellent cycling stability and rate capability as an anode material for a lithium-ion battery.

The invention relates to a neutral blockage removing agent composition used for an oil recovery formation in an oilfield. The neutral blockage removing agent composition is prepared from the following raw materials in parts by weight: 10-14 parts of polyepoxysuccinic acid amine, 35-40 parts of diethylenetriaminepentaacetic acid amine, 33-37 parts of hydroxyl succinic acid amine, 20-25 parts of polyacrylamide, 7-10 parts of sodium polyaspartate, 10-14 parts of sodium gluconate, 10-15 parts of activated clay, 20-25 parts of potassium peroxodisulfate, 9-11 parts of hydroxyl butanedioic acid amine, 4-7 parts of sodium salicylate, 5-9 parts of hexamethylene tetramine, 0.2-0.3 part of vanadium pentoxide, 2-5 parts of starch, 5-8 parts of alpha-sulphonated fatty acid methyl ester and derivative thereof (MES) and 0.1-0.3 part ofdiethyl ethanolamine. The neutral blockage removing agent composition is used for the blockage removal of an oil pumping well and a screw pump well in the oilfield, can effectively solve the problems of cleaning blockage removal of the oil pumping well and the screw pump well in the oilfield and the corrosion of oil recovery equipment, has high blockage removing speed, is neutral and is free of corrosion; waste liquid for blockage removal can be degraded and does not need to be discharged onto the ground to be subjected to sewage treatment, no corrosion, dead angle, precipitation or secondary well blockage are generated, and more safety and more reliability are realized as compared with traditional pickling blockage removing, biological blockage removing and solvent blockage removing.

Drug-loading thermosensitive hydrogel. Raw materials for preparation of the drug-loading thermosensitive hydrogel contain N-isopropylacrylamide, acrylamide and hydroxyethyl cellulose. Corresponding steps contain: dissolving hydroxyethyl cellulose in distilled water; adding an intermixture of N-isopropylacrylamide and acrylamide into a hydroxyethyl cellulose solution; adding an initiator potassium peroxodisulfate and an additive tetramethylethylenediamine, and introducing nitrogen for protection so as to obtain a grafting product; drying the grafting product, and extracting in an extractor by using acetone as an extractant; dissolving the purified grafting product in distilled water, adding sodium hydroxide and a cross-linking agent epoxy chloropropane, and carrying out magnetic stirring to obtain a drug-loading thermosensitive hydrogel semi-finished product; and soaking the semi-finished product in deionized water to obtain the drug-loading thermosensitive hydrogel with lower critical solution temperature being 37-41 DEG C. the product has equal level of mechanical strength in comparison with the prior art. In addition, the preparation is more convenient to operate, and time cost is saved.

The invention relates to a preparation method for a fire preventing and extinguishing colloid material for coal mines. According to the method, crylic acid and acrylamide serve as water absorption monomers, bentonite and kaolin serve as a filling agent or an enhancer, N,N'-methylene bisacrylamide serves as a cross-linking agent, and potassium peroxodisulfate serves as an initiator; an aqueous solution polymerization method is adopted for preparing bentonite/ kaolin/crylic acid-acrylamide plural gel. The bentonite/ kaolin/crylic acid-acrylamide plural gel prepared through the method is low in cost, resistant to high temperature and resistant to salt and alkali, and the fire preventing and extinguishing efficiency of the colloid material is greatly improved; the colloid material, loess, coal ash, water and the like are mixed and stirred to prepare coal mine fire preventing and extinguishing slurry; and the slurry material is high in water absorption capability, good in fire extinguishing effect and particularly suitable for fire preventing and extinguishing of the coal mines.

The invention discloses a synthesis method of 2,6-diamido-3,5-dinitropyrazine-1-oxide. 2,6-dichloropyrazine serves as initial raw materials, potassium peroxodisulfate serves as oxidizing agents to carry out oxidizing reaction, the 2,6-dichloropyrazine is oxidized to obtain 2,6-dichloropyrazine1-oxide, then the 2,6-dichloropyrazine1-oxide is reacted in an ammonia solution to obtain 2,6-diamidopyrazine1-oxide, then the 2,6-diamidopyrazine1-oxide is subjected to a nitration reaction in nitro-sulfuric acid, and the 2,6-diamido-3,5-dinitropyrazine-1-oxide is obtained. Compared with an existing synthesis method, only three steps are needed for synthesizing LLM-105, the synthesis process is shortened, trifluoroacetic acid is not needed, solvents are cheap and environmentally friendly, and the manufacturing cost is reduced.

The invention relates to a preparation method of positive active material hollow spherical lithium manganate of a lithium ion battery, and belongs to the technical field of a chemical battery. The method comprises the steps of uniformly mixing a manganese sulfate aqueous solution with a potassium persulfate aqueous solution, adding concentrated sulfuric acid, carrying out hydrothermal reaction, then centrifuging the mixed solution, taking out solid phase, and washing and drying the solid phase to obtain spinous hollow manganese dioxide spheres; mixing soluble lithium salt and the spinous hollow manganese dioxide spheres to obtain a mixture I, ultrasonically processing, drying and burning the mixture I to obtain hollow spherical lithium manganate. The prepared spherical lithium manganate belongs to a spinel type, the diameter of the spherical lithium manganate is 0.5 to 5 micrometers, the degree of crystallinity is good, the spherical lithium manganate is mainly formed by clustering and assembling spinous nanowires, a large clearance is formed between two adjacent nanowires, a porous structure is formed inside the spherical lithium manganate, the lithium atom density is reasonable, the activity is low, the chemical stability is high, adequate contact when the lithium salt is dissolved and the lithium manganate is synthesized in the later period can be facilitated, the insertion and separation of lithium ions can be facilitated, and the electrochemical cycling reversibility and stability of the lithium ion battery can be effectively improved.

The invention discloses a feather non-woven composite needled filter material for treating high-content sludge. The feather non-woven composite needled filter material comprises, by weight, 50-70 parts of feather fibers, 20-30 parts of polyester fibers, 24-35 parts of methacrylate, 2-6 parts of potassium peroxodisulfate, 3-6 parts of sodium hydrogen sulfite, 2-7 parts of 2% hydroquinone solution, an appropriate amount of deionized water, an appropriate amount of ethanol, an appropriate amount of acetic acid buffer solution, 2-4 parts of KH-570, 14-25 parts of hydroxyapatite powder, 0.5-1 part of N,N'-methylene bisacrylamide, 0.5-1 part of emulsifier, 0.8-2 parts of photoinitiator TPO, 2-7 parts of graphene oxide, 1-4 parts of chitosan, 0.5-1 part of glycidyl trimethyl ammonium chloride and an appropriate amount of 40% sodium hydroxide solution. The feather non-woven composite needled filter material has the advantages that the feather fibers are modified by methacrylate grafting, the hydroxyapatite is loaded onto the modified feather fibers by utilizing ultraviolet grafting, and the absorption performance, on heavy metal ions in wastewater, of the filter material is increased.

The invention relates to a synthesis method of a low temperature-resistant perfluoroether rubber. The synthesis method comprises the following steps: 1) evenly mixing an emulsifier, fluoroether oil and water together and heating until 40 DEG C to form a microemulsion, and adding a comonomer A and a comonomer B to the microemulsion to obtain a mixed liquor; 2) adding deionized water and a pH regulator to a reaction kettle, adjusting the content of oxygen in the reaction kettle to be lower than 20ppm, increasing the temperature in the reaction kettle to the range of 70-120 DEG C, and adding the mixture of tetrafluoroethylene and perfluoromethyl vinyl ether to the reaction kettle; 3) adding the mixed liquor to the reaction kettle and adding the initiator potassium peroxodisulfate to start reacting, and adding a vulcanization point monomer and a chain transfer agent until the reaction ends, thereby obtaining a polymer; 4) performing electrolyte coagulation on the polymer and then washing, drying in vacuum and molding by plastifying to obtain the perfluoroether rubber. The synthesis method is simple to operate and mild in reaction conditions, and is capable of preparing the low-temperature-resistant perfluoroether rubber by adjusting the monomer structure.

The invention relates to the technical field of an adhesive, in particular to white emulsion with improved water-resistant performance. The white emulsion is prepared from the following ingredients ofpolyvinyl acetate, vinyl acetate, polyvinyl alcohol, glycol, water-resistant modified starch, dibutyl phthalate, vinyl versatate, an emulsifier, an initiator, lyophobic filling materials, a plasticizer, N-hydroxymethyl acrylamide and water, wherein the lyophobic filling materials are mixed inorganic filling materials of nanometer calcium carbonate, roasted kaolin and montmorillonite subjected tohydrophobic modification; the emulsifier is sodium dodecyl benzene sulfonate or sodium oleate; the plasticizer is tributyl citrate or acetyl trioctyl citrate; the initiator is one kind of materials from potassium peroxodisulfate, ammonium persulfate and hydrogen peroxide. The white emulsion has the advantages that the bonding performance is good; the curing time is shorter; the water-resistant performance is excellent; tackless cannot easily occur in the damp environment.

The invention relates to a pigment separator of cold-transfer print paper, whose formula in mass percentage comprises: the copolymer of crylic acid and styrene in 35-80%; silicon dioxide in 0.05-0.5%; Turkey chilli oil in 0.2-1.8%; three-butonate in 0.1-0.8%; starch in 5-30% whose etherified degree is 0.7-1.2; and water. The producing method comprises: in the emulsion of initiator, mixing and adding sodium bisulfite and potassium peroxodisulfate, and heating it to 50Deg. C; adding the butyl acrylate, the mixture of crylic acid and styrene monomer into said emulsion, to initiate aggregation, and heating it to 70-80Deg. C; at said temperature, reacting for 1-2h, to attain the copolymer; adding turkey chilli, silicon dioxide, three-butonate, and starch whose etherified degrees is 0.7-1.2 and adding water; attaining the cold transfer print paper. The inventive transfer print paper coated with separator has the function for shielding carrier, with better print transfer property, anti-penetrate property, and anti-compress property, etc, to support the coil paper production.

The invention provides a high-efficiency ceramic water reducing agent and a preparation method thereof. The high-efficiency ceramic water reducing agent comprises the following components by weight percent: 35 to 60 polyoxyalkylene, 0 to 10 methacrylic acid or maleic anhydride, 0 to 20 methacrylic acid, 0 to 10 sodium allyl sulfonate, 0 to 20 2-hydroxyethyl acrylate, 1.0 to 3.0 potassium persulfate, 0.5 to 1.0 hydroquinone and 1.0 to 2.0 p-toluenesulfonic acid, and the weight percent of the components is not zero. The high-efficiency ceramic water reducing agent can greatly reduce the water content of slurry after being added into ceramic pulp and satisfies fluidity needed by ceramic production. The high-efficiency ceramic water reducing agent is added into a glaze material, the glaze material has good fluidity and proper viscocity under a lower water-content condition, greatly reduces a glaze cutting phenomenon, and the like and increases product quality. The high-efficiency ceramic water reducing agent has good universality and can be suitable for various clay mineral materials.

The invention discloses a preparation method and an application of hydrophobization beta-cyclodextrin cation polyelectrolyte. In a water phase, three monomers, namely polymerizable beta-cyclodextrin derivatives, acryloyl oxyethyl trimethyl ammonium chloride and styrene, are subjected to a free radical copolymerization reaction under an oxidation/reduction (potassium peroxodisulfate/sodium hydrogen sulphite) initiating system to obtain the hydrophobization beta-cyclodextrin cation polyelectrolyte product. The hydrophobization beta-cyclodextrin cation polyelectrolyte product is white powder solids and is stable in structure and convenient to store and transport, hydrophilcity is reduced and better solubility is still maintained; the preparation method of the hydrophobization beta-cyclodextrin cation polyelectrolyte product is simple, and low in energy consumption; no other auxiliaries such as a surface active agent is added in an aqueous solution polymerization process, and environmental pollution is less; and the hydrophobization beta-cyclodextrin cation polyelectrolyte product can serve as a novel flocculating agent for decoloration, the specific structure of beta-cyclodextrin (beta-CD) is reserved, toxicity and cost are low, flocculation capacity is strong, decoloration speed is high, an applicable pH range is wider (2-12), and salt tolerance is high.

The invention discloses a preparation method for a compound particle temporary plugging agent. The preparation method comprises the following steps: dissolving potassium peroxodisulfate particles andNaOH in water, diluting acrylic acid with water, putting acrylic acid into an ice water mixed solution and dropwise adding the NaOH solution into acrylic acid, thereby obtaining a locally neutralizedacrylic acid solution; rising the temperature of a water bath kettle, adding acrylamide solution, sodium alginate, dissolved potassium peroxodisulfate solution and water into a three-port flask containing a stirrer, a refluxing condensing unit and a thermometer, and then reacting; putting the product into a constant temperature drying oven, baking till reaching constant weight, smashing into powder and then adding aluminum nitrate powder and starch, uniformly mixing, adding water and kneading into microspheres; scattering a small amount of light calcium carbonate onto the microspheres, preventing the microspheres from bonding, putting into an air blowing drying oven and drying till reaching constant weight. The preparation method disclosed by the invention has the beneficial effect that the prepared compound material temporary plugging agent microsphere is capable of achieving an expected effect, has the effects of plugging measures and is capable of improving the exploitation benefitsof oil fields.