101 results about "Methallyl chloride" patented technology

The invention relates to a lost circulation material for effectively plugging fractured and crushed stratum malignant loss in the drilling process and a preparation method. The invention adopts the technical scheme that a raw material for preparing the lost circulation material comprises the following components: 8 to 12 grams of hexadecyl dimethyl allyl ammonium chloride, 16 to 18 grams of acrylamide, 6 to 12 grams of styrene sodium sulfate, 0.2 to 0.4 gram of sodium dodecyl benzene sulfonate, 0.2 to 0.4 gram of potassium persulfate / sodium bisulfite, 16 to 20 grams of bentonite clay, and 239 to 279 grams of fresh water. The preparation method of the lost circulation material comprises the following steps of: firstly, dissolving recrystallized hexadecyl dimethyl allyl ammonium chloride, acrylamide and styrene sodium sulfate in the water; filling N2, adding an initiator and performing the reaction for 24 hours; precipitating, soaking and drying by using acetone so as to obtain white copolymer; and adding sodium dodecyl benzene sulfonate and bentonite clay into the copolymer and the water to obtain the lost circulation material. The lost circulation material can be used for plugging a leakage zone, has strong crushing resistance and strong temperature resistance and mineralization resistance degree and is suitable to be used for carrying out plugging on a big crack in the drilling process.

The invention relates to a synthetic method of 2-methallyl alcohol. The synthetic method comprises the step of carrying out esterification reaction, refinement and separation and hydrolysis reaction on 2-methallyl chloride and sodium carboxylate to prepare 2-methallyl alcohol, wherein the formulas of the esterification reaction and the hydrolysis reaction are respectively formula (1) and formula (2) both referring to the description; the R is CH3 or CH3CH2, namely, methyl or ethyl. According to the invention, the synthetic method is reasonable in technology and easy to operate; the product is high selectivity and relatively high in quality; carboxylic sodium in the esterification reaction stage and water in the hydrolysis reaction stage are recycled and need no external supplement, so that cyclic utilization is achieved, and the product yield is improved.

The invention relates to a hydrophobically associated type cation acid solution retardant for oil gas well acidification in petroleum industry and a preparation method thereof. According to the invention, a retarded acid is utilized for acidifying deep parts of the stratum, in order to improve the acid treatment effect. The technical scheme is as follows: the acid solution retardant is polymerized from four monomers, including acrylamide AM, allylpolyoxyethylene ether APEG-1000, methacryloxyethyltrimethyl ammonium chloride DMC, and cetyl dimethyl diallyl ammonium chloride DMAAC-16. The method of preparation is as follows: adding APEG-1000 whose mole percent is 2.00-8.00% into a flask, adding water 50.00-150.00g, carrying out stirring and dissolving, adding materials in percentage by mole including 63.40-79.60% of AM, 15.80-28.25% of DMC and 0.30-0.70% of DMAAC-16, and obtaining a solution whose concentration is 15%; finally adding an initiator, allowing reaction for 6 hours at 50 DEG C, carrying out washing by ethanol and drying, and obtaining the acid solution retardant. The retardant has a good retardance performance, so that deposition is not easy to be produced, and the retardant has good heat stability, good temperature tolerance and compatibleness.

The invention belongs to the field of chemical industry, and discloses a method for preparing 2-methyl allyl alcohol by esterification and hydrolysis. The method comprises the following steps of: first, performing esterification reaction of 2-methyl allyl chloride and carboxylate; and then, kalifying for hydrolysis reaction to synthesize 2-methyl allyl alcohol. The synthesizing steps are as follows: (1) esterification reaction: under the effect of a phase transfer catalyst, adding carboxylate, water and 2-methyl allyl chloride into a high pressure kettle for esterification reaction; after esterification reaction, cooling, standing and layering the reaction liquor to obtain an organic layer and a water layer, wherein the organic layer is a mixture which takes 2-methyl allyl carboxylate as a main product; (2) hydrolysis reaction: adding alkali liquor to the organic layer obtained in the esterification reaction stage for hydrolysis reaction; cooling, standing and layering the mixed liquor obtained by hydrolysis to obtain an organic layer and a water layer, wherein the organic layer is a target product, namely 2-methyl allyl alcohol. The method is high in material conversion ratio and product selectivity, the product yield is improved, and the separation energy consumption and material consumption are reduced.

The invention relates to a micro-branched micro-cross-linked association polymer, a preparation method and applications thereof. The preparation method comprises: (1) carrying out initial mixing: mixing acrylamide, acrylic acid, 2-acrylamide-2-methyl propanesulfonic acid, a rigid monomer, a branched monomer, a hydrophobic monomer, a surfactant and a solvent, wherein the rigid monomer is any one ora variety of materials selected from N-vinylpyrrolidone, styrene and sodium p-styrenesulfonate, the branched monomer is ethylene dimethacrylate and / or 2-(dimethylamino)ethyl methacrylate, and the hydrophobic monomer is any one or a variety of materials selected from N,N-di-n-octyl acrylamide, N-dodecyl acrylamide and octadecyl dimethylallyl ammonium chloride; (2) adjusting the pH value by addingan alkali; (3) adding an auxiliary agent; and (4) polymerizing: adding an initiator to the mixed solution treated in the step (3), and initiating a polymerization reaction so as to obtain the micro-branched micro-cross-linked association polymer, wherein the obtained micro-branched micro-cross-linked association polymer has excellent temperature resistance and excellent salt resistance.

The invention discloses an adsorptive acid liquor retarding admixture for acidification in oil and gas wells and a preparation method thereof. According to the technical scheme, the acid liquor retarding admixture comprises the following monomers in percentage by mole: 4.2 to 4.7 percent of octadecyl dimethyl allyl ammonium chloride (BAZ) monomer, 1.9 to 2.3 percent of allyl polyethylene glycol (APEG) monomer, 93 to 93.5 percent of acrylic amide (AM) monomer, and 2,2'-azobis(2-methylpropionamide) dihydrochloride (AIBA) serving as an initiator in an amount which is 0.4 to 0.5 percent of the total mass of the monomers. The preparation method comprises the following steps of: adding BAZ, APEG and AM into a reaction container, adding water to prepare a solution of which the monomer concentration is 10 mass percent, adding the initiator, mixing uniformly, reacting for 6 to 7 hours at the temperature of between 50 and 55 DEG C, and thus obtaining the acid liquor retarding admixture. The preparation method is simple and feasible; the reaction conditions are mild; and the acid liquor retarding admixture is high in thermal stability, can be adsorbed to stratum crack walls, can be used for retarding the reaction speed of acid liquor and the crack walls and achieving the effect of deep acidification and is used for preparing acidifying liquor.

The invention discloses a hydrophobic associated polymer modified magnetic nano-thickener and a preparation method thereof. The hydrophobic associated polymer modified magnetic nano-thickener is a core-shell structured nanocomposite prepared by taking nanometer Fe3O4 as the core, modifying the Fe3O4 through oleic surfactants and grafting an amphiphilic high-polymer compound, wherein the amphiphilic high-polymer compound is a hydrophobic associated water-soluble ternary polymer prepared by copolymerizing a water-soluble monomer, a heat-resistant and anti-salt monomer and a hydrophobic monomer,the water-soluble monomer is acrylamide, the heat-resistant and anti-salt monomer is 2-acrylamide-2-methylpropanesulfonic acid, and the hydrophobic monomer is styrene, n-octyl acrylate or octadecyl dimethyl allyl ammonium chloride. The hydrophobic associated polymer modified magnetic nano-thickener helps solve the problems of high cost and poor thickening performance of nano-thickeners and reutilization difficulty of polymer thickeners and is an efficient thickening and recycling integrated nano-thickener obtained by modifying low-toxicity magnetic nanometer materials and amphiphilic high-polymers; the preparation method of the hydrophobic associated polymer modified magnetic nano-thickener has no need for high-temperature and high-pressure reaction conditions and helps reduce the operation difficulty and the production cost.

The invention relates to novel method for obtaining a methyl epichlorohydrin transferring the catalyst of epoxidation by using a Methallyl Chloride. The catalyst does not dissolve into a reaction medium, but under the effect of the hydrogen peroxide, the catalyst can dissolve into active species and further react with the Methallyl Chloride, thus leading to an epoxidation reaction under high selectivity. The Methallyl Chloride has a conversion rate of 96 percent for hydrogen peroxide, and the methyl epichlorohydrin has a selectivity of 95 percent for the Methallyl Chloride. When the hydrogen peroxide is fully consumed, the catalyst is precipated from the reaction system. Through a simple separation, the catalyst can be recycled and reused again. The separation of the catalyst, compared with the multi-phase catalyst, fully presents the characteristics of the even-phase catalyst in the reaction process. The invention has the advantages of easy recycling and simple reaction system. The product is a single methyl epichlorohydrin which is environmentally-friendly and has a low cost which meets the request for economical technology; therefore the invention is a novel method which is suitable for lager-scale industrial production of the methyl epichlorohydrin.

The invention discloses a preparation method of methyl octabromo-ether and belongs to the technical field of fire retardant methyl octabromo-ether production. The preparation method comprises the following steps: dissolving tetrabromobisphenol A in water, regulating a pH (potential of hydrogen) value with sodium hydroxide, performing heat preservation for the first time, dropwise adding a methallyl chloride organic solution, adding a phase transfer catalyst, after dropwise adding, performing heat preservation for the second time, then cooling to a room temperature, performing lamination, taking an organic layer, dissolving a brominating agent in an organic solvent to form a brominating agent solution, adding the organic layer into a catalyst, dropwise adding the brominating agent solutionfor brominating reaction, performing heat preservation for the third time at 25-55 DEG C, adding a sodium sulfite aqueous solution for reaction, washing with water after the reaction, standing for lamination, taking a lower organic layer, adding into an emolsifier aqueous solution, performing distillation to remove the organic solvent, performing suction filtration to form a material, and drying the material to prepare a product, wherein a mole ratio of the water to tetrabromobisphenol A is (2-8):1; and a range of the pH value is 8-10.

The invention relates the high gloss paper. On the front and back of the base paper there are solid front coating and back coating. The front coating comprises bottom coating and face coating. In face coating there is the second class particle composed by silica dioxide and calcium carbonate. On the surface of the second class particle there is dispersing agent film and the particle diameter of the second class particle is 300nm-500nm. The binding agent of face coating comprises PVA and EVA. The dispersing agent of face coating is sodium polyacrylate, polystyrene-cis-1.2-ethylenedicarboxylic acid, polytrimethylene allyl group amchlor. The method is easy to get raw material, simple formulation, good fixation property, mildew-resistant and water resistant and low cost.

A process for synthesizing methallyl chloride includes such steps as gas-phase mixing of chlorine with isobutylene, separating chloride from HCl, neutralizing, continuous multi-tower vacuum distilling, and neutralizing. Its apparatus features that the cooling system is separated from reactor system. Its advantage is high product purity (more than 99.5%).

The invention belongs to the technical field of oil and gas well acidification, and specifically provides a preparation method of surfactant-grafted nano-silica. Firstly, alkyl (C8-C14) dimethyl allylammonium chloride and methyl dichlorosilane are subjected to a hydrosilylation reaction and an esterification reaction under the catalysis of chloroplatinic acid to obtain a coupling agent; then nano-silica is activated at 120 DEG C for 24h, the activated nano-silica is uniformly dispersed in toluene, and then the coupling agent is added to continue a reaction for 2-15h, and the surfactant-grafted nano-silica is obtained after centrifugation, washing and drying. According to the preparation method of the surfactant-grafted nano-silica, a surfactant is grafted on the surface of the nano-silica, so that the problems that foams are unstable and acid-rock reaction rate is high under an actual stratum environment with a foam acid are solved, the half-life period of the foams can be effectivelyincreased, and the acid-rock reaction rate can be effectively reduced; and the surfactant-grafted nano-silica has the characteristic of effectively delaying the acid-rock reaction, and can be used toacidification operation of carbonate rock formations to increase an acidification penetration distance, thereby achieving a purpose of deep acidification.

The invention discloses a polymer emulsifying and thickening agent and a preparation method thereof. The polymer emulsifying and thickening agent contains a plurality of polymerization monomers, wherein each polymerization monomer contains the following components in percentage by mass: 30.0-99.9% of anionic monomers and 0.1-10.0% of amphoteric cationic monomers; the anionic monomers are one or at least two selected from acrylic acid, methacrylic acid and 2-acrylamide-2-methylacrylsulfonate; the amphoteric cationic monomers are one or at least two selected from N, N-dimethyl-N-dodecyl methylallyl ammonium chloride, N, N-dimethyl-N-tetradecyl methylallyl ammonium chloride, N, N-dimethyl-N-dodecyl allyl ammonium chloride and N, N-dimethyl-N-dodecyl tetradecyl allyl ammonium chloride; and the weight-average molecular weight of the polymer emulsifying and thickening agent is 2000-6000 thousands. The polymer emulsifying and thickening agent is good in thickening and emulsifying effects and salt resistance, high in swelling speed and low in preparation cost and can be produced on a large scale.

The invention provides a filtrate reducer for drilling fluid. The filtrate reducer is characterized by being prepared from acrylamide, 2-acrylamido-2-methyl propyl sulfonic acid and hexadecyl dimethyl allyl ammonium chloride. According to the invention, the acrylamide, 2-acrylamido-2-methyl propyl sulfonic acid and hexadecyl dimethyl allyl ammonium chloride are taken as raw materials for preparing the filtrate reducer for the drilling fluid, and the filtrate reducer for the drilling fluid has relatively good filtration reducing property and also has relatively good temperature and salt tolerance.

The invention discloses a chitosan / silver nanowire functional cotton fiber and its preparation method. The preparation method includes steps of applying sodium hydroxide, trimethylallylammonium chloride, PAMAM modified cotton fabric to obtain cationization cotton fabric; then orderly immersing the cationization cotton fabric in the silver nanowire solution and chitosan solution after being modified by terminal hydroxyl hyperbranched polymer to self-assemble so as to obtain the chitosan / silver nanowire functional cotton fiber. The chitosan and silver nanowire are self-assembled and firmly combined layer by layer through electrostatic pull, thus the cotton fiber has excellent conductivity, antibiosis, uvioresistant and other performances. Besides, the wrinkle resistance and salt-free dyeing performance of the modified cotton fabric are also improved. The chitosan / silver nanowire functional cotton fiber has important application value in textile, clothes, wearable equipment, flexible conductive appliances, and other domains.

The present invention relates to a method for synthesizing 2-methallyl alcohol through a continuous hydrolysis reaction. The method comprises: 1, water, an alkali, a phase transfer catalyst and 2-methyl allyl chloride are uniformly mixed in a material preparing container to obtain a raw material mixture; 2, the raw material mixture is continuously input to the tower kettle, and evaporation is performed on the tower kettle to produce 2-methyl allyl chloride steam and the tower bottom liquid, wherein the 2-methyl allyl chloride steam rises and enters a filler bed layer; 3, a reactor circulation material and a product post-treatment material are extracted from the tower kettle, wherein the reactor circulation material is input into the tower top, then descends in the reactor, is subjected to a hydrolysis reaction with the 2-methyl allyl chloride steam at the filler bed layer, and then enters the tower bottom liquid; and 4, the unreacted 2-methyl allyl chloride rises to the tower top, and is extracted out of the reactor in the 2-methyl allyl chloride exhaust gas form, wherein the reactor pressure is 10-100 kPa, and the reactor temperature is 90-100 DEG C.

The invention discloses a graphene oxide / chitosan / silver nanowire functional cotton fiber and a preparation method thereof. A cationized cotton fabric is obtained through modifying a cotton fabric byvirtue of sodium hydroxide, trimethylallylammonium chloride and PAMAM (polyamidoamine), and then is sequentially impregnated in a hydroxyl-terminated hyperbranched polymer modified silver nanowire solution and a graphene oxide-chitosan mixed solution, and the graphene oxide / chitosan / silver nanowire functional cotton fiber is finally obtained by self-assembly. Graphene oxide / chitosan and a silver nanowire are self-assembled and firmly bonded layer by layer by virtue of an electrostatic force, and the cotton fiber is endowed with high performance of conductivity, antibacterial performance, antiultraviolet performance and the like, and has high application value in the fields of textile, clothes, wearable equipment, flexible conductive devices and the like.

The invention discloses an anti-swelling and sand-inhibiting agent for a high-permeability heavy oil reservoir. The anti-swelling and sand-inhibiting agent is prepared from components as follows: 10%-35% of acrylamide or methacrylamide, 5%-25% of 2-acrylamide-2-methylpropanesulfonate, 1%-5% of styrene or acrylonitrile, 5%-20% of acryloyloxyethyl trimethyl ammonium chloride or trimethylallylammonium chloride and water. The invention further provides a preparation method of the anti-swelling and sand-inhibiting agent for the high-permeability heavy oil reservoir. According to the preparation method, proportionally prepared monomers are simultaneously added to a reactor and sequentially subjected to catalysis, microwave heating and ultraviolet lamp irradiation, so that the functional monomers of the anti-swelling and sand-inhibiting agent for the high-permeability heavy oil reservoir are enabled to have homopolymerization; the anti-swelling and sand-inhibiting agent for the high-permeability heavy oil reservoir is suitable for medium-high-permeability heavy oil reservoirs at the temperature of 70-120 DEG C, clay swelling preventing and sand migration inhibiting effects are good, reservoir clay swelling and formation sand dispersion and migration can be inhibited, and fine sand and silty-fine sand in the formation can be effectively prevented from flowing into a wellbore.

The invention relates to a high-selectivity 2-methyl allyl chloride synthesis method and a synthesis reactor. Isobutene and chlorine are taken as the raw materials to have a gaseous phase chlorinationreaction in a microchannel reactor with a cooling surface to obtain the 2-methyl allyl chloride. The isobutene and the chlorine are reacted in the T-shaped microchannel reactor, the mixing speed is quite fast, meanwhile, the huge heat exchange area in the unit reaction volume guarantees the stable reaction at the basically constant temperature, the controllability is good; therefore, the side reaction caused by too high local temperature is effectively inhibited, the reaction selectivity is high, and no phenomenon of coking is caused.

The invention discloses PEDOT:PSS / chitosan / silver nano-wire functionalized cotton fiber and a preparation method thereof. The preparation method comprises the following steps: modifying cotton fabricwith sodium hydroxide, trimethylallylammonium chloride and PAMAM to obtain cationized cotton fabric, dipping the cationized cotton fabric into a silver nano-wire solution modified with a hyperbranchedpolymer with terminal hydroxyl and a PEDOT:PSS-chitosan mixed solution sequentially, and performing layer-by-layer self-assembling to finally obtain the PEDOT:PSS / chitosan / silver nano-wire functionalized cotton fiber. The PEDOT:PSS-chitosan and the silver nano-wire are firmly combined through electrostatic attraction layer-by-layer self-assembling, the cotton fiber is endowed with excellent electroconductive, antibacterial and anti-ultraviolet properties, and important application value is achieved in the fields of textile, clothes, wearable equipment, flexible electroconductive devices and the like.

The invention discloses a double-side chain polycarboxylate superplasticizer and a preparation method thereof. The double-side chain polycarboxylate superplasticizer is prepared by the following steps: generating conventional free radical polymerization by virtue of polyether monomers and (methyl) allyl chloride under the actions of an initiator and a chain transfer agent, so as to obtain a prepolymer; generating nucleophilic substitution by virtue of the prepolymer and sodium hydrosulfide, so as to obtain a macromolecular chain transfer agent with sulfydryl; and finally, carrying out free radical polymerization by virtue of the macromolecular chain transfer agent, a monomer A and a monomer B. The preparation method has the beneficial effects that by producing through a one-pot method, nowaste material is produced, the process is simple, and the large-scale production is promoted; the product has the advantages of low mixing amount, high water-reducing rate, good slump retaining property and the like when being applied to concrete, so that the production cost of the concrete can be greatly saved; the double-side chain polycarboxylate superplasticizer has low sensitivity to the types of cements and good tolerance to sandstone aggregates with high silt content, and the viscosity of high-strength concrete can be effectively reduced.

The invention discloses a method of synthesizing methoxypolyethylene glycol allyl methyl ether of water reducer macromonomer. In a NaOH or KOH solution, the methoxypolyethylene glycol allyl methyl ether is condensed by a methoxypolyethylene glycol and a methyl allyl chloride. The raw material used in the method of the invention is the methyl allyl chloride which is cheap and easily obtained. The technological process is simple and the cost is low. The method is suitable for industrial production of an allyl methyl ether compound. Simultaneously, the reaction conditions are mild. The method is environment-friendly due to no use of a toxic solvent as a water-carrying agent.

The invention discloses a preparation method of methyl octabromoether, belonging to the technical field of production of the fire retardant methyl octabromoether. The method comprises the following steps: (1) enabling bisphenol A and an etherifying agent 2-methylallyl chloride to be subjected to an etherification reaction under the alkaline condition with a pH value of 8 so as to generate a bisphenol A bisallyl ether intermediate; (2) after the reaction is completed, firstly removing the excessive etherifying agent and volatile by-products by means of atmospheric distillation, then adjusting the pH of the reaction product to be neutral, and adding a brominating agent for carrying out a bromination reaction, wherein the brominating agent is hydrobromic acid and solid sodium bromide; (3) after the bromination reaction is completed, cooling to the room temperature, filtering, washing with deionized water, transferring the reaction product into a crystallization kettle, adding an emulsifier, additives, seed crystal, water and dichloromethane, sealing the crystallization kettle, and heating for desolventizing; finally, separating by means of suction filtration, washing with deionized water, and drying to obtain the methyl octabromoether.

The invention relates to the technical field of oil recovery and particularly relates to an active functional polymer surfactant for oil displacement and a preparation method thereof. The polymer surfactant comprises the following raw materials: acrylamide, sodium hydroxide, sodium 2-acrylic amino-2-methyl propanesulfonate, hexadecyl dimethyl allyl ammonium chloride, sodium dodecyl benzene sulfonate, urea, sodium 3-acrylamido-3-methyl butyrate, N-vinyl-2-pyrrolidone and an initiator, wherein the initiator comprises the following components in percentage by mass based on the acrylamide: 0.0141% of sodium formate, 0.0192% of disodium ethylenediamintetraacetate, 0.2308% of low-temperature initiator, 0.0103% of potassium persulfate and 0.0102% of sodium hydrogen sulfite. The active functional polymer surfactant provided by the invention realizes efficient tackifying and is quickly dissolved in an aqueous solution, the contradiction between the tackifying property and water solubility of a polymer is solved, and the oil recovery factor is remarkably increased.

The invention relates to a high-content 2-methyl allyl chloride preparation method. A chlorination reaction solution obtained through the reaction of isobutene and chlorine is taken as the raw material, the high-content 2-methyl allyl chloride is obtained through continuous rectifying of an isobutyl chloride separation tower, an isobutylene chloride separation tower and a 2-methyl allyl chloride separation tower, wherein the separation of isobutylene chloride uses a extractive distillation method. The preparation method has the advantages that the number of needed rectifying towers is small, the content of the obtained 2-methyl allyl chloride is high, and the energy consumption is low.

The invention discloses a glass cleaner for windows. The glass cleaner comprises the following raw components in parts: 5-10 parts of cocamidopropyl betaine, 5-8 parts of lauramidopropyl betaine, 10-15 parts of acrylamide hexadecyl dimethyl diallyl ammonium chloride-2-acrylamide-2-methyl propanesulfonic acid, 15-25 parts of normal butanol, 5-10 parts of butyl cellosolve, 5-8 parts of polyethylene glycol, 15-20 parts of 1, 2-propylene glycol, 12-15 parts of normal propyl alcohol, 3-6 parts of sodium tripolyphosphate, 4-8 parts of disodium dihydrogen pyrophosphate, 1-3 parts of sodium hexametaphosphate, 3-5 parts of isocitric acid trisodium salt, 4-6 parts of sodium hydroxide, 5-12 parts of sodium trichloroacetate, 5-10 parts of color masterbatch powder and 100-150 parts of deionized water. The glass cleaner for the windows, disclosed by the invention, has the advantages that smudges such as dust and the like on window glass can be easily removed; dirt accumulated on the glass can be well removed; the cleaned glass becomes bright and is quick-drying and no dirt removing trace is left.

The invention discloses a preparation method of nanoscale hyperbranched hydrophobically associating polyacrylamide, wherein the polyacrylamide is a nanoscale hyperbranched multi-arm hydrophobically associating polymer formed by grafting acrylamide, hexadecyl dimethyl allyl ammonium chloride and a 2-acrylamide-2-methylpropanesulfonic acid copolymer with pentaerythritol tetraacrylate as an inner core; S1, preparing a hexadecyl dimethyl allyl ammonium chloride hydrophobic monomer; S2, preparing materials; S3, preparing a water-phase monomer reaction solution; S4, preparing an oil-phase reaction liquid: dissolving pentaerythritol tetraacrylate in xylene, adding the obtained solution into the oil-phase solvent, uniformly stirring, adding an emulsifier, and magnetically stirring the mixture to obtain the oil-phase reaction liquid; S5: carrying out copolymerization reaction. According to the invention, the nanoscale hyperbranched hydrophobically associating polyacrylamide prepared by using aninverse microemulsion polymerization method has excellent shear resistance, hydrophobicity and salt resistance, has nanoscale size, and improves the crude oil recovery ratio.

The invention discloses a nano zinc oxide / silver nanowire multifunctional cotton fiber and a preparation method thereof. The preparation method includes: using sodium hydroxide, trimethylallylammoniumchloride and PAMAM to modify a cotton fabric to obtain a cationic cotton fabric, then impregnating the cationic cotton fabric in a hydroxyl terminated hyperbranched polymer modified silver nanowire solution and a nano zinc oxide solution in order for self-assembly, thus finally obtaining the nano zinc oxide / silver nanowire multifunctional cotton fiber. Silver nanowires and nano zinc oxide undergolayer-by-layer self-assembly to combine firmly, and endow the cotton fiber with excellent conductive, antibacterial, anti-ultraviolet and other properties. The nano zinc oxide / silver nanowire multifunctional cotton fiber prepared according to the invention has important application value in textile, clothing, wearable devices, flexible conductive devices and other fields.

The invention discloses modified polyanionic ammonium salt for drilling fluid and a preparation method of the modified polyanionic ammonium salt. The ammonium salt is prepared from following materials of hydrolyzed polyacrylonitrile ammonium salt, epoxy chloropropane, water, dodecyl dimethyl allyl ammonium chloride, crylic acid, 2-acrylamide-2-methyl-propanesulfonic acid, acrylamide, ammonium persulfate and sodium sulfite. The preparation method comprises the following steps of: weighing water, hydrolyzed polyacrylonitrile ammonium salt, epoxy chloropropane, dodecyl dimethyl allyl ammonium chloride, ammonium persulfate and sodium sulfite; putting into a reaction kettle, sealing, heating, reacting and cooling; adding the weighed crylic acid, the 2-acrylamide-2-methyl-propanesulfonic acid and acrylamide to the cooled reaction kettle, stirring to completely dissolve, sealing and leading in nitrogen, heating and reacting under protection of the nitrogen; and discharging to obtain a product by vacuulizing and drying. The modified polyanionic ammonium salt can resist super-high temperature of 240 DEG C, resists statured salt water, compound saline water and seawater, can effectively reduce the filter loss of the drilling fluid, does not tackify, and is good in anti-collapse performance.

The invention relates to a method for continuously preparing 2-methylallyl alcohol. The method comprises the steps of: adopting a multi-stage series continuous stirring reactor, performing a reactionon a sodium acetate solution and 2-methylallyl chloride with sodium hydroxide to obtain 2-methylallyl alcohol directly, and performing separation after the product is collected from the upper part ofthe reactor, wherein the remaining substances, water and the sodium acetate solution, in the collected substances from the upper part of the reactor can be reused in the reactor except the desired product; meanwhile, sodium chloride produced during the reaction can be precipitated automatically by controlling high-content sodium acetate and the pH value of the reaction, and the sodium acetate mother solution can be reused in the reactor. The MAC and sodium hydroxide are adopted as raw materials, and only two kinds of products, 2-methylallyl alcohol and sodium chloride crystals, are obtained after the continuous reaction and separation are performed in the high-molar-ratio sodium acetate solution; reaction heat is applied to the step-by-step heating process of the materials, and additionalenergy is not required, so that energy consumption of the process is low, and the water in the reaction process can be applied to cyclic preparation of the sodium hydroxide solution and be added intothe reaction.