793results about How to "No heating required" patented technology

The invention discloses a normal-temperature synthesis method for a polycarboxylic acid water-reducing agent, and belongs to the field of cement concrete water-reducing agents. The water-reducing agent is prepared by the following steps of: copolymerizing polyoxyethylene ether monomer or polyoxyethylene ester monomer a containing unsaturated double bonds, unsaturated monocarboxylic acid and derivative monomer thereof b, unsaturated dicarboxylic acid c and unsaturated sulfonic acid or salt monomer thereof d in aqueous solution under the action of an oxidation reduction initiator, and finally neutralizing the solution by using alkali solution to obtain the water-reducing agent. The reaction can be performed at room temperature by adopting an oxidation reduction initiating system, and the appropriate reaction temperature is between 5 and 30 DEG C; and the synthesis process does not need heating, so energy is saved, and high-temperature side reaction is effectively controlled. The prepared polycarboxylic acid high-performance water-reducing agent has the characteristics of high water-reducing rate and good collapse protecting performance. The water-reducing agent has wide application range, and the method has low production process requirement and is suitable for industrialized large-scale production.

The invention discloses a room-temperature cured epoxy resin flexible sealant and a preparation method thereof. The room-temperature cured epoxy resin flexible sealant comprises a component A and a component B, wherein, the component A comprises 40-80 weight portions of epoxy resin, 10-40 weight portions of diluent, 10-30 weight portions of plasticizer, 0.5-5.0 weight portions of silane coupling agent, 0.05-2.0 weight portions of antifoaming agent, and 0.2-2.0 weight portions of anti-oxidant, the component B comprises 10-50 weight portions of aliphatic short-chain amine curing agent and 30-90 weight portions of aliphatic long-chain amine curing agent, and the weight ratio of the component A to the component B is (0.8-1.0):1.0. The invention further discloses a preparation method of the epoxy resin flexible sealant. The epoxy resin flexible sealant disclosed herein has moderate mixing viscosity and good levelability, and can be rapidly cured at room temperature. The cured substance has good light transmittance and flexibility, and can be applied for surface coating of LED strip light, LED path light, LED mold strip and other technology products.

The invention relates to a waterproof system for a basement bottom board and a wall surface and a construction method thereof. The construction method comprises the steps of: horizontally spreading and pasting a self-adhesive rubber bituminous waterproof sheet material on a concrete base layer, and building up a brick permanent protection wall outside a preset position of a basement wall surface, wherein the bottom of the brick permanent protection wall is vertically connected with the concrete base layer, the self-adhesive rubber bituminous waterproof sheet material spreads over corners of the basement wall surface and then is upward folded to be spread and pasted on the water attaining surface of the brick permanent protection wall, then the self-adhesive rubber bituminous waterproof sheet material is lapped with another self-adhesive rubber bituminous waterproof sheet material pasted above the brick permanent protection wall, a self-adhesive rubber bituminous waterproof sheet material is pasted on an outer vertical surface of the basement wall surface. The construction method has the advantages of strong construction continuity, fast speed, good construction environment, low cost and the like, eliminates the hidden danger of fire since the heating is avoided in the construction process, is safe and reliable, completely changes and improves the traditional waterproof construction environments and the waterproof construction technology. The waterproof system can be widely applied in basements, underground structures and roofs.

The invention relates to a composition of mosquito preventing extract, which comprises components of 0-10wt percent of clove oil, 0-10wt percent of litsea cubeba oil, 0-10wt percent of eucalyptus oil, 0-50wt percent of pure linaloe wood leaf oil, 0-10wt percent of thyme oil, 0-20wt percent of citionella oil, 0-10wt percent of geranium oil, 0-20wt percent of aspic oil, 0-10wt percent of wintergreen oil, 0-10wt percent of dementholized peppermint oil, 0-10wt percent of cinnamon oil, 0-60wt percent of cedar wood oil, .0-10wt percent of michelia alba leaf oil, 0-10wt percent of rue oil, 0-10wt percent of rose oil, 0-10wt percent of tea tree oil. The rest of the composition is at least any one of the following aromatic alcohols: linalool, rhodinol, nerol, geraniol, isogeraniol, citronellol and terpineol. The average mosquito preventing efficiency of the composition of mosquito preventing extract can realize above 90 percent and the scent is widely acceptable to be more than 90 percent; the mosquito preventing method of the invention is simple and can be directly dispersed by ultrasonic or sprayed or dropped in a mosquito preventer device made of porous ceramic for naturally dispersing without heating.

The invention discloses treatment liquid and a method for preparing a Ti / Zr-containing yellow passive film on the surface of an aluminum alloy. Each liter of treatment liquid comprises the following components by weight: 0.5 to 2.0g of fluorotitanic acid, 0.4 to 2.0g of fluorozirconic acid, 2.0 to 5.0g of manganate and 0.5 to 2.0g of organic acid; and the pH value of the treatment liquid is between 2.0 and 3.0. The treatment liquid of the invention does not contain chromium or other toxic substances, conversion treatment is realized without heating, the treatment time is between 5 and 30 minutes, and a yellow Ti / Zr-containing chemical conversion film can be prepared on the surface of the aluminum alloy. The chemical conversion film prepared by the method has high decay resistance and high bonding strength with a substrate, and is treated at room temperature by a simple process; and the coating does not contain hexavalent or trivalent chromium which is harmful to environment and human bodies.

The invention discloses a method and a catalyst for simultaneously purifying volatile organic contaminants in the air and ozone under room temperature and application thereof. The purifying method is that: ozone is catalytically decomposed under room temperature to generate highly active oxygen atoms to further oxidize volatile organic contaminants in the air and at last carbon dioxide and water are generated; the catalyst takes three-dimensional porous metal as a vector, activated carbon, silicon oxide, aluminum oxide and compound materials thereof as a coating and transition metal oxides of Mn, Cu, Fe, Ni and Co as active components. The method can remove organic contaminants and ozone under room temperature at the same time without heating, the operation process is simple and the removal rate of ozone and organic contaminants is high. Meanwhile, the catalyst of the invention is prepared by impregnation, wherein, the process is simple; the catalyst has large specific surface area, low air resistance, excellent performance and low cost and can be widely applied to purifying industrial organic waste gas and organic contaminants in the rooms.

The invention discloses a water-reducing slump-retaining type polycarboxylic acid water reducing agent and a preparing method thereof. The water-reducing slump-retaining type polycarboxylic acid water reducing agent has the pH of 6.0-7.0 and comprises the following raw materials in parts by weight: 190-200 parts of methyl-2-buten-1-ol polyoxyethylene ether with the molecular weight of 600-3000, 15-25 parts of acrylic acid, 1-5 parts of hydroxyalkyl acrylate, 0.1-3 parts of unsaturated phosphate, 0.5-5 parts of unsaturated alcohol ether, 1.0-3.5 parts of an oxidant, 0.1-2 parts of a reductant, 0.1-2 parts of sodium formaldehyde sulfoxylate, 0.5-2.5 parts of a chain transfer agent, 325 parts of water, and a proper amount of a caustic soda liquid with the mass concentration of 30-32%. The water-reducing slump-retaining type polycarboxylic acid water reducing agent has the advantages of high content of effective components, good dispersion and excellent performance; and the preparation method adopts a room temperature process and a composite initiation system, has the appropriate reaction temperature of 5-40 DEG C, has no need of heating, makes the production more convenient and the cost lower, saves energy and protects the environment.

The invention discloses a room temperature super-fast curing double-component solvent-free polyurethane structural adhesive including A and B components; the A component comprises the following components in parts by weight: 50-90 parts of polyols, 0-50 parts of a chain extender, 0.5-15 parts of a catalyst, 0-30 parts of a filler and 5-10 parts of a stabilizer; the B component includes the following two parts: 50-100 parts of polyaryl polymethylene isocyanate and 0-50 parts of hexamethylene diisocyanate. The structural adhesive prepared by the method can be rapidly cured at room temperature.

The invention discloses a method for recycling palladium from a silver electrolyte by using dimethylglyoxime. The method comprises the following steps: adding dimethylglyoxime into a palladium-containing electrolyte for precipitating palladium; performing solid-liquid separation, returning filtrate as an electrolyte, and eluting filter residue with nitric acid acidification water to obtain a dimethylglyoxime palladium crude product; dissolving the dimethylglyoxime palladium crude product with aqua regia, and then precipitating palladium with ammonium chloride; eluting an obtained ammonium chloropalladate precipitate with an ammonium chloride solution until filtrate is colorless; and adding water, heating, and dissolving; filtering, and cooling filtrate; adding ammonia water, complexing and dissolving; cooling, filtering, and eluting the filter residue with ammonia water; adding hydrochloric acid for acidifying filtrate; filtering to obtain a diammonium dichloropalladite precipitate; and reducing the precipitate by hydrazine hydrate to obtain palladium sponge with the grade of 99.99%. Heating and pH regulation are not required, and only quantitative precipitation of palladium is required; the selectivity is good; and the precipitated dimethylglyoxime palladium can achieve a very high purity after simple eluting, so that the palladium purifying process is greatly shortened and the palladium recycling rate is improved; the using amount of dimethylglyoxime is low; and except a small amount of ethanol, other ions are not brought, so that the reuse of the electrolyte is not affected.

The invention provides a method for extracting polysaccharides from bagasse, the method is: after degreasing the bagasse, using one or more of cellulase, papain and pectinase at pH 4-6, Hydrolyze at 40-80°C for 0.5-1.5 hours, then treat with ultrasonic waves with a frequency of 59KHz for 0.5-1.5 hours, filter, and finally use ethanol to precipitate polysaccharides in the filtrate. The method of the invention adjusts the type and amount of enzymes and the technological conditions of enzyme treatment and ultrasonic extraction on the basis of the process of extracting fungal polysaccharides, and finds a low energy consumption and high-efficiency method for extracting bagasse polysaccharides.

The invention discloses a metallographic corrosion method for a martensitic precipitation hardening stainless steel crystal boundary, wherein the stainless steel is 05Cr17Ni4Cu4Nb martensitic precipitation hardening stainless steel. The method comprises the following steps: 1, coarsely grinding, finely grinding, polishing, cleaning and drying a metallographic sample to obtain a shine scratch-freepolished surface; and 2, picking up a corrosive agent, wiping the polished surface for 15-20s, flushing, and drying, wherein the corrosive agent is prepared by pouring 2-3ml of concentrated hydrochloric acid into 30ml of concentrated nitric acid, uniformly stirring and allowing the obtained solution to stand for above 5min. According to the invention, the 05Cr17Ni4Cu4Nb martensitic precipitation hardening stainless steel crystal boundary can be intelligibly and completely displayed, and the color and the morphology of the tissue have no influences on the observation of the contour of the crystal boundary. The method has the following advantages: the crystal boundary display effect is excellent; normal temperature corrosion and no need of heating are realized; and the corrosion time is short, and only 15-20 seconds are needed.

The invention relates to the technical field of concrete admixtures, in particular to a clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and a preparation method thereof. With polyether macromonomers, unsaturated carboxylic acid, unsaturated carboxylic ester, dibasic acid anhydride, a crosslinking agent, amide monomers, unsaturated phosphate ester, phosphate, an oxidizing agent , a reducing agent, a chain transfer agent, a neutralizing agent and water as raw materials, the clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer is synthesized at normal temperature. Ester groups, amide groups and phosphate ester are introduced into the molecular structure of the polycarboxylate superplasticizer, and light crosslinking of the polycarboxylate superplasticizer is realized through the long-chain ester crosslinking agent, so that the superplasticizer has a good clay-resisting and slump-retaining effect and has the advantages of low mixing amount, high water reducing rate, high adaptability to clay-containing sand, good slump retaining performance and the like; besides, only normal-temperature polymerization is needed, the processis simple, the production cost is low, and the superplasticizer is suitable for industrial production.

The invention relates to a method for recycling base oil of the waste liquid of an oil-based drilling liquid, and in particular belongs to a solid-liquid separation technique in the technical field of waste oil-based drilling liquid treatment. The method comprises the following steps of: (1) preparing a composite demulsifying agent, namely compounding AE, BP, AP and OP-10 or NP-10, wherein the mass ratio of the AE to the BP to the AP to the OP-10 or the NP-10 is 1 to 2 to 2 to 1, 2 to 1to 1 to 2, 1to 3to 3 to 2 or 2 to 3 to 2 to 1; (2) demulsifying and flocculating, namely under a stirring state, adding a polymeric flocculant, the composite demulsifying agent, an anionic surfactant and a cationic surfactant into the waste liquid of the oil-based drilling liquid; and (3) carrying out solid-liquid separation. The method provided by the invention is suitable for recycling and treatment of the base oil of the waste liquid of various oil-based drilling liquids, the technology is simple, no heating is needed, the investment is less, the cost is low, and the recycling rate of the oil is high; the recycled base oil is used for preparing the drilling liquid again, the performance of the drilling liquid is not changed, so that harmlessness and reclamation of the drilling liquid are realized, and energy is saved.

The invention discloses a method for displacement chemical silver plating on copper powder. The method comprises the following steps of: cleaning and oil removal, water washing, acid etching, water washing, catalytic liquid treating, chemical silver plating and the like. In the method, a catalytic liquid capable of preplanting catalytic mass points is developed; the surface of the copper powder is preplanted with discretely distributed palladium mass points after the copper powder is treated by the catalytic liquid at a room temperature by controlling components, pH value and treatment time of the catalytic liquid; and the preplanted palladium mass points can catalyze and promote the silver ion reduction to improve precipitation speed and to retard copper-ammonia complex ions to be absorbed on the copper surface so as to obtain a sliver plating layer with good cladding performance in the chemical silver-plating process for the copper powder. Compared with the conventional method of displacement chemical silver plating, the method realizes surface activation of the copper powder by pretreating the catalytic liquid, a silver content of the silver plating copper powder is greatly improved, the problems of poor cladding performance of replacement type chemical silver plating and the like are solved, and the method is simple in process and convenient to operate and has good application prospect.

The general multifunctional foam fire-extinguishing agent consists of plant protein 0.8-30 wt%, sugar 0.8-30 wt%, hydrocarbon surfactant 1-12 wt%, fluoric surfactant 0.1-5 wt% and additive 5-20 wt%, except water. The general multifunctional foam fire-extinguishing agent may be used to extinguish fire of alcohol and other polar chemical matter and / or light oil, heavy oil and other non-polar chemical matter. The general multifunctional foam fire-extinguishing agent contains no corrosive chemical matter, and has self-cleaning property, capacity of prolonging the service life of the fire-extinguishing equipment, no toxicity and no harm to human body and no environmental pollution.

The invention discloses a PAC-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PAC-PDMDAAC compound coagulant is prepared as the following steps: the PAC dry powder or solution is arranged in a mixing reactor, and water is added to obtain a PAC solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PAC-PDMDAAC. The application of the PAC-PDMDAAC compound coagulant is to adopt the PAC-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PAC-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PAC-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention provides an aqueous system conductive polyaniline ultraviolet curing antistatic coating and a preparation method thereof. In the method, water-based conductive polyaniline is used as a conductive component, water-based ultraviolet curing resin is used as a film-forming component, coatings with different conductivities can be respectively obtained, and a coating with the surface resistance value range of 1*10<3> to 1*10<9>omega / sq is formed on a base material; the coating has the characteristics of high photocuring speed of 20 to 26M / min, no need of heating, high efficiency and energy conservation; the coating does not contain any toxic, harmful and volatile organic solvents such as toluene and dimethylbenzene, is an aqueous system coating and is environmentally-friendly; the coating has a stable system and cannot be demixed after being placed for six months at room temperature; and when a conductive coating containing the aqueous system conductive polyaniline ultraviolet curing antistatic coating is placed in the air for one year, the surface resistance is only improved by 1.3 to 8 percent, so the coating has lasting antistatic effect.

The invention discloses a method for preparing a polycarboxylic acid grafted copolymer superplasticizer. In the method, the preparation is implemented at the low temperature of 5-30 DEG C; a used initiating system is a complex initiating system which adopts the combination of one initiator I and various reducers R, or one reducer R and various initiators I or various initiators I and various reducers R, wherein the initiator (s) I is (are) selected from hydrogen peroxide, persulfate salt LS2O8 and a water-soluble azo initiator W, and the reducer (s) R is (are) selected from ascorbic acid and certain kinds of inorganic salt. The preparation method is simple, excellent in repetition stability and low in cost, does not require heating, and avoids toxicity and pollution; the prepared superplasticizer is high in water-reducing rate, and excellent in adaptability and slump-retaining capability, thereby being suitable for popularization and application.

The invention discloses a PFS-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PFS-PDMDAAC compound coagulant is prepared as the following steps: the PFS dry powder or solution is arranged in a mixing reactor, and water is added to obtain a ferric-salt PFS solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PFS-PDMDAAC. The application of the PFS-PDMDAAC compound coagulant is to adopt the PFS-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PFS-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PFS-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention discloses treatment solution for preparing an aluminum alloy surface amorphous composite passivation film, a preparation method and application. A formula of the treatment solution comprises 5 to 15g / L of corrosion inhibiting negative ion-containing rare earth salt, 3 to 10g / L of catalyst type composite oxidant, 1 to 3g / L of auxiliary oxidant, 0.1 to 0.5g / L of buffering film-forming accelerator and 0.5 to 1.5g / L of composite stabilizer. The treatment solution does not contain any toxic chromium or organic substances, does not need heating during conversion treatment of 2 to 5 minutes, and can prepare the golden amorphous 'rare earth-manganese' composite passivation film with excellent performance on the aluminum alloy surface. The treatment solution well solves environmental pollution and human harm caused by the present hexavalent chromium treatment, and can overcome the defects that a zirconium titanate series conversion film is colorless and field judgment cannot be realized. The preparation method has the advantages of simple process, simple and convenient operation and low cost, and is easy to realize industrialization.

The invention relates to a low-temperature high-activity flue gas denitrification catalyst and preparation thereof. According to the catalyst, a carbon-base material serves as a carrier and carries one or more metal active components of active Al2O3, Mn, Cu and Fe and one or two of rare earth active components of Ce and La. The content of the carbon-base carrier ranges from 35% to 65%, the carrying content of the Al2O3 ranges from 2% to 5% by the content of the aluminum element, the content of the metal active components ranges from 13% to 26% by the content of the metal elements, and the carrying content of the rare earth active components ranges from 20% to 39% by the content of the rare earth elements. According to the catalyst, the carbon-base material is activated through dilute nitric acid and then is coated with aluminum oxide sol, the metal active components and the rare earth active components are carried, then drying and sintering are carried out in the inert atmosphere, and the catalyst is obtained. The catalyst high in flue gas denitrification catalytic efficiently at the low temperature (90-120 DEG C) and not likely to cause poisoning and failures is obtained. The catalyst is low in production cost, simple in production technology and especially suitable for thermal power plants, steel plants, sintering plants and other enterprises with heavy fuel gas emission.

The invention relates to a polycarboxylate water reducer for ultra-compact concrete for nuclear power and a preparation method of the polycarboxylate water reducer. Every 100 parts of the water reducer comprises components in parts by weight as follows: 50-55 parts of a dispersing ether type polycarboxylate water reducer, 20-25 parts of a slump retaining ether type polycarboxylate water reducer, 3-5 parts of a retarder, 0.01-0.05 parts of a defoaming agent, 1-3 parts of a water retaining agent, 1-2 parts of a shrinkage reducing agent, 0.1-0.3 parts of a preservative and the balance of water. The components are uniformly mixed in parts by weight during preparation. Compared with the prior art, the water reducer has the advantages as follows: concrete workability and liquidity are improved, a temperature peak value and a shrinkage value of the concrete are reduced, the internal porosity of the concrete is reduced, the self-compacting performance and the durability of the concrete are improved and the like; besides, the preparation method is simple, raw material sources are wide, the cost is low, and the water reducer is environment-friendly and has the good application prospect.

The invention discloses a poly silicon iron coagulating agent and a preparation method thereof, relates to an inorganic polymer coagulating agent and a preparation method thereof and solves the disadvantages of poor adaptability to low temperature and low turbidity water quality, high production cost, complex preparation technique and secondary pollution to the environment in the existing preparation process of poly silicon iron coagulating agent. The poly silicon iron coagulating agent of the invention is made from soluble glass, soluzione leggermente acida, ferrous sulfate and sodium chlorate. The preparation method of the poly silicon iron is as follows: step 1. raw materials are weighted; step 2. the soluble glass is added into the soluzione leggermente acida and activated silicic acid is prepared after the reaction; 3. the ferrous sulfate and the sodium chlorate are added into the rest soluzione leggermente acida and then the activated silicic acid obtained in step 2 is added, thus obtaining the poly silicon iron coagulating agent. The poly silicon iron coagulating agent is applicable to low temperature and low turbidity water quality and has the advantages of low preparation cost, simple preparation method and no pollution during the preparation process.

The invention discloses a low-dosage high-early-strength alkali-free liquid accelerator and a preparation method thereof. The alkali-free liquid accelerator is prepared from the following raw materials: 1, an alkali-free liquid accelerator; 50%-60% of modified aluminum sulfate, 2%-4% of a fluorine-aluminum complex solution, 3%-6% of an organic cosolvent, 1%-2% of a pH regulator, 0.5%-1.5% of an inorganic stabilizer, 0.3%-0.5% of a viscosity regulator, 4%-6% of a composite early strength agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. The invention also provides a preparation method of the alkali-free liquid accelerator. The preparation process of the alkali-free liquid accelerator is simple; hydrofluoric acid-free process, alkali-free, chlorine-free, rust-free steel bar, non-polluting environment. Meanwhile, when the mixing amount of the alkali-free liquid accelerator is 5%-6%, the technical requirements of GB / T35159-2017 on the alkali-free accelerator can be met, the one-day compressive strength is larger than or equal to 13.0 MPa, and the alkali-free liquid accelerator has the advantages of being low in mixing amount, good in stability, high in early strength and large in later strength retention rate.

The invention discloses a closed-type constant-temperature multi-layer water circulation turtle cultivation system which comprises a multilayer turtle cultivation pool devices, a cultivation water environment adjusting device, an indoor air environment adjusting device and a cultivation system operation control device, wherein the multilayer turtle cultivation pool device comprises a plurality of turtle cultivation pools, circulating water return pipes, circulating water outlet branch pipes and main circulating water outlet pipes, primary solid liquid precipitation devices, blow-down valves and pollution discharge blow-down pipes; the cultivation water environment adjusting device comprises a solid-liquid separator, a blow-down valve, a sterilizer, a protein separator, a biological filtering device or tank, a circulating pump and a water heating device; and the indoor air environment adjusting device comprises an air heating device, an air oxygenating device and an insulation building. According to the closed type constant-temperature multi-layer water circulation turtle cultivation system, turtle cultivation environments can be comprehensively controlled, the land, the water and the energy are saved, an optimal ecological environment suitable for turtles to rapidly grow is established, turtle cultivation is free of drugs, and healthy and safe food sanitation requirements are met.

The preparation process of separate soybean protein includes the following steps: low temperature defatting bean, the first leaching, separating protein liquid from bean dregs, the second leaching, separating protein liquid from bean dregs, deairing, acid depositing, filterig with ultrafiltering film to obtain concentrated liquid, water washing, neutralizing, sterilizing, spray drying and spraying phospholipid to obtain the separate soybean protein product.

The invention relates to a polycarboxylate superplasticizer, and particularly relates to a heat source-free short-time preparation method of a controlled-release type polycarboxylic acid high-performance slump retaining agent. The heat source-free short-time preparation method comprises the following steps: adding methyl allyl polyethenoxy ether and water in a container, after stirring for 0.5 hour at normal temperature, adding an initiator and an initiation additive, stirring for 2min at normal temperature; titrating a mixed water solution of acrylic acid, hydroxyethyl acrylate and 2-acrylamide-2-methylacrylsulfonate, and a chain transfer agent water solution simultaneously within 1 hour, then insulating heat for 0.5 hour, regulating a pH value to 6-7 by adopting an alkaline liquor, and finally diluting by adding water until the solid content is 40 percent. The heat source-free short-time preparation method is simple in preparation process, simple in equipment, and free from heating in the whole reaction process so that energy resources are saved; the production period is only 2 hours, and thus the production efficiency is greatly increased, and the application range is wide; and the synthesized controlled-release type polycarboxylic acid high-performance slump retaining agent has the characteristics of less doping amount, good slump retaining property, environment friendliness and the like.

The invention discloses a method for preparing high-purity bulleyaconitine A. The method comprises the following steps of: soaking a fresh radix aconiti agrestis root in acid aqueous solution, performing homogenate extraction and cavitation mixing solid-liquid extraction, collecting and concentrating the filtrate, and respectively performing gradient elution to obtain a crude bulleyaconitine A product through ion exchange resin column chromatography and macroporous adsorption resin column chromatography; and uniformly mixing crude bulleyaconitine A product and ethanol aqueous solution, dissolving in a water bath, cooling the filtrate to room temperature, standing and crystallizing at the temperature of 4 DEG C, repeatedly washing the crystal by using the ethanol aqueous solution, and obtaining a final product. According to the method, crushing and extracting are finished in one step through a homogenization method, and the method has the advantages of zero dust and simple flow. By adoption of a negative-pressure cavitation extraction technology, the mass transfer rate is improved, heating is not required, and the production period is shortened; and moreover, the reagents used in the whole process are ethanol and water, the organic solvent amount is greatly reduced, the production cost can be reduced, the environmental pollution is reduced, and the method has good application prospect.

The invention relates to the technical field of chemical cleaning, in particular to a cleaning agent for stainless steel seamless stay tubes and a preparation method for the cleaning agent. The cleaning agent for the stainless steel seamless stay tubes is prepared by mixing the following raw materials in percentage by weight at normal temperature: 45.5 to 72.75 percent of water, 1 to 2 percent of alkylphenol polyoxyethylene, 2.5 to 5 percent of citric acid, 5 to 10 percent of oxalic acid, 2.5 to 5 percent of sodium molybdate, 5 to 10 percent of triethanolamine, 7.5 to 15 percent of fatty alcohol-polyoxyethylene ether, 3 to 6 percent of tartaric acid, 0.25 to 0.5 percent of nitric acid, 0.25 to 0.5 percent of hydrofluoric acid and the balance of hexamethylenetetramine. The cleaning agent for the stainless steel seamless stay tubes has novel process, is easy to operate and strong in cleaning force, does not need to be heated, can be reused, can be used for cleaning the stainless steel seamless stay tubes without corroding the surface of stainless steel, and keeps the glossiness of the stainless steel; and the cleaning agent for the stainless steel seamless stay tubes has no injury to the skin, is low-carbon and environment-friendly, has high cost performance, and saves the cost.

Disclosed is a preparation method of grapheme. The preparation method of the grapheme comprises the following steps: graphite powder is added to non-water polar solvent dissolved with acene condensed nucleus arene derivative to form a mixed system; the mixed system is shocked, washed, centrifuged and filtered to obtain grapheme solution. The preparation method of the grapheme is not high in requirements for preparation conditions, simple in preparation process, good in quality of obtained grapheme, almost free of structural defects and considerable in productivity.