60 results about "Allyl chloride" patented technology

The invention discloses a synthesis method of allyl phosphonic acid diester. According to the method, phosphorous acid diester and an allyl chloride compound are used as raw materials and react in the presence of a specific transition metal catalyst and alkali under the conditions of normal pressure and 45-60 DEG C to obtain the allyl phosphonic acid diester. The method has the advantages of mild reaction conditions, simple operation, high product yield (90-99%), no by-product, no generation of halogenated alkane gas and easy industrial production, and is suitable for the fields of polymer flame retardants, electronic materials, pesticide and medicine intermediates and the like.

The application relates to a preparation method of BOPP waste discharge adhesive tape and belongs to the technical field of adhesive tape. BOPP raw materials, an anti-blocking agent and color master batch are uniformly stirred and mixed, then are sent into an extruder for extrusion and chilling forming; the formed adhesive tape is longitudinally stretched, transversely stretched, pulled, subjected to surface corona treatment, wound, subjected to aging treatment, cut and packaged to obtain the BOPP waste discharge adhesive tape; the anti-blocking agent is prepared through polymerization reaction, centrifugal separation and drying by using a methacrylate, a methallyl nickel chloride dimer, 4-vinylbenzocyclobutene, a mercapto-beta-cyclodextrin and an initiator; the prepared BOPP waste discharge adhesive tape has excellent mechanical properties, low light transmittance and good light shielding performance.

The invention belongs to the technical field of oil exploitation, and particularly relates to a fracturing fluid thickening agent as well as a preparation method and application thereof. The preparation method comprises the following steps: adding aminomethane tripropionic acid, ethanol and allyl chloride into a first reactor, carrying out a heat preservation reaction, and carrying out reduced pressure distillation to obtain a first functional monomer; adding 3-amino-1, 5-naphthalene disulfonic acid disodium salt, ethanol and allyl chloride into a second reactor, carrying out a heat preservation reaction, and carrying out reduced pressure distillation to obtain a second functional monomer; adding acrylamide, 1, 5-hexadiene-3, 4-diol, 3-[(3-acrylamidopropyl) dimethylammonium] propionate, a first functional monomer, a second functional monomer, monopotassium phosphate and water into a third reactor, dropwise adding an initiator, carrying out heat preservation reaction, adding ethanol, separating out precipitate, centrifuging to obtain a solid, and drying overnight to obtain the thickening agent. The thickening agent provided by the invention has the advantages of high apparent viscosity, strong shear resistance and strong antibacterial ability.

The application discloses a kind of adsorptive control materials for tunnel hole slag stone powder and application.The adsorptive control material is mixed by surface active component, complex component, anti-mud component three components according to 3-7:1:0.5-5 mass ratio;The surface active component is one or more of dodecyltrimethylammonium chloride, dodecyl dimethyl benzyl ammonium chloride, didodecyltrimethylammonium chloride;The complex component is one or more of sodium silicate, sodium hexametaphosphate;The anti-mud component is one or more of polyethylene glycol, β-cyclodextrin, dimethyl diallyl ammonium chloride.The adsorptive control material can improve the adsorption of tunnel hole slag stone powder, ensure the working performance of concrete.

The invention relates to the technical field of oil and gas field development, and particularly discloses an environment-friendly nano microemulsion retarded acid and a preparation method thereof, the environment-friendly nano microemulsion retarded acid comprises: a water phase, which is an acid-containing aqueous solution; the modified porous nano silicon dioxide powder has strong adsorbability and response release property; the retarder is formed by polymerizing acrylamide, dimethyl diallyl ammonium chloride, N-vinyl pyrrolidone, perfluoroalkyl acrylate and perfluoropolyether acrylate under the action of an initiator; an oil phase; an emulsifier; an emulsion stabilizer; and an iron ion stabilizer. The invention has the beneficial effects of high acid utilization rate, high acidity, multi-stage retarding, good acid etching effect, small damage, high acidification transformation efficiency, good safety and environmental protection property, 100-300nm emulsion particle size, good stability and no demulsification and layering after being placed at room temperature for 30 days, and the effective components of the acid liquor are wrapped by the microemulsion.

The invention provides an inorganic matter and cationic organic matter compounded clay stabilizer for water injection, and discloses that trimethyl monoallyl ammonium chloride is used as a raw material, and polymerization in the use process is prevented after a p-benzoquinone polymerization inhibitor is added, so that cationic monomer micromolecules containing double bonds are used as an organic clay stabilizer, and the stability of the organic clay stabilizer is improved. When being used together with the same raw material cationic organic matter with small molecular weight, namely 2-hydroxyethyl trimethyl ammonium chloride, the clay swelling prevention agent has the performance of preventing clay swelling, anti-scouring capability and long-term effect, and has better performance of preventing clay swelling after being compounded with cheap inorganic raw materials, namely aluminum chloride, dipotassium phosphate and industrial ammonium chloride; the prepared clay anti-swelling agent compounded by the inorganic matter and the cationic organic matter not only has excellent capacity of preventing clay swelling, but also has good anti-scouring capacity and good washing resistance, and an innovative demonstration effect is achieved for preventing damage of clay swelling and migration to a reservoir in water injection and improving the water injection recovery ratio.

The present disclosure relates to a reactor for preparing allyl chloride. More specifically, the present disclosure relates to a reactor for preparing allyl chloride capable of improving the dispersibility of a raw material and inducing a uniform reaction within the reactor, thereby improving the selectivity and yield of allyl chloride.

The present application belongs to the technical field of wastewater treatment, and discloses a coal slime water treatment agent, a preparation method and application thereof. The coal slime water treatment agent comprises a coagulant aid G and a flocculant F prepared respectively. The coagulant aid G comprises the following components in mass percentage: 3-5% of sodium hypochlorite, 2-4% of water glass, 3-5% of active silicic acid, 1-2% of sodium carboxymethyl starch, and the balance of water, and the total amount of the coagulant aid G is 100%. The flocculant F comprises the following components in mass percentage: 2-5% of sodium alginate, 2-6% of polyethyleneimine, 2-5% of chitosan, 1-4% of hydroxyethyl cellulose, 2-5% of dimethyl diallyl ammonium chloride, 3-6% of tannic acid, and the balance of water, and the total amount of the flocculant F is 100%. When the coal slime water treatment agent is applied, the coagulant aid G is first added to perform micro-treatment and pre-flocculation on the coal slime water, and then the flocculant F is added to perform intensified flocculation, so that the components complement each other, synergistically promote flocculation and sedimentation of suspended matters, and efficient separation of the suspended matters and water is realized.

The invention relates to the field of fluorescent probes, in particular to a CO fluorescent probe, a preparation method of the CO fluorescent probe and application of the CO fluorescent probe in a reagent for detecting inflammatory reaction in a living body. The probe takes DBX-OH with a push-pull electronic structure as a red fluorophore, and is connected with a recognition unit allyl chloroformate through a phenolic hydroxyl group of the DBX-OH. The detection mechanism is as follows: when the probe does not react with CO, the fluorescence of the probe is in a closed state due to a photoinduced electron transfer effect; when the allyl chloroformate and CO are subjected to specific reaction under the catalysis of Pd (0), the allyl chloroformate chain is broken and separated, and the PET process is inhibited, so that the strong red fluorescence of DBX-OH is recovered, and the'open 'type detection is realized. The probe has the outstanding advantages of red light emission, excellent water solubility, extremely low detection limit and the like. The method is successfully applied to in-vivo inflammation detection of mouse and zebra fish models, and the dual application potential of the method in the field of biomedical research is highlighted.

The application relates to the technical field of plugging removing agents for oilfield recovery, in particular to a foamed acid plugging removing system and a preparation method thereof. The foamed acid plugging removing system comprises a foamed acid component, a foaming agent and a gas phase component, and the foamed acid component comprises, in mass ratio, oxalic acid, phosphoric acid, triethanolamine, dimethyl diallyl ammonium chloride, acetic acid, disodium phosphate and sodium nitrite in a mass ratio of (10-12):(3-5):4:2:(1.5-2.5):0.05:0.05:1. The total weight m1 of the foamed acid component and the total weight m2 of the foaming agent satisfy the relationship m1:m2=100:(1.5-2.5). The volume V1 of the gas phase component and the total volume V2 of the foamed acid component satisfy the relationship V1:V2>=40:1. The foamed acid plugging removing system can improve the plugging removing effect of an acid plugging removing agent in a heterogeneous formation, so that the plugging material dissolution rate is above 65%, the dissolution rate is above 1.20g / (m 2 ·h), the foaming multiple is above 4.0, and the stable foaming time is above 420s.

The application belongs to the technical field of organic synthesis, and specifically discloses a preparation method of dimethyl diallyl ammonium chloride, which comprises the following steps: under the condition that water exists, dimethylamine, an alkaline carrier and allyl chloride are mixed and subjected to a contact reaction to obtain a crude tertiary amine; the alkaline carrier comprises a carrier body and a carbonic acid alkali metal salt loaded on the carrier body; under the condition that an organic solvent exists, the crude tertiary amine and allyl chloride are mixed and subjected to a contact reaction. The method can effectively reduce the hydrolysis of allyl chloride and the generation of dimethylamine hydrochloride in the reaction process, the dimethyl diallyl ammonium chloride product contains almost no other hydrochloride impurities, and the reaction efficiency, the yield and the purity of the dimethyl diallyl ammonium chloride are improved.

The invention discloses a carbon dioxide pollution resistant filtrate reducer for water-based drilling fluid and a preparation method thereof, and belongs to the technical field of filtrate reducers for water-based drilling fluid. The preparation method comprises the following steps: sequentially dissolving monomers N 'N-dimethylacrylamide, sodium p-styrenesulfonate, dimethyl diallyl ammonium chloride, N-vinyl pyrrolidone and 2-acrylamide-2-methylpropanesulfonic acid in a molar ratio of 5: (3-8): (1-5): (0-4): (1-6) in a solvent, adding an alkali solution to adjust the pH value, heating, adding an initiator, drying, and crushing to obtain the filtrate reducer. The filtrate reducer for the water-based drilling fluid has strong competitive adsorption capacity with carbonate and bicarbonate, can improve the performance of the drilling fluid, increase the carbon dioxide containing threshold value and reduce the risk that the filtration performance is out of control after the drilling fluid is polluted by carbon dioxide, and is suitable for improving the formula of the filtrate reducer for the water-based drilling fluid.

The invention relates to the field of water treatment, and discloses a self-tracing type scale and corrosion inhibitor based on a novel fluorescent copolymer and a preparation method, and the scale and corrosion inhibitor comprises the following components: the novel fluorescent copolymer, an auxiliary polymer, a conventional AMPS copolymer, organic phosphonate, zinc salt and the balance of water. The novel fluorescent copolymer is obtained by carrying out copolymerization reaction on a fluorescent monomer B, acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid; and the fluorescent monomer B is prepared by reacting 4-chloro-1, 8-naphthalic anhydride with 3-dimethylaminopropylamine, reacting the product with sodium methoxide, and further reacting the obtained intermediate with chloropropene. And the auxiliary polymer is a lauryl methacrylate-N, N-dimethylaminoethyl methacrylate copolymer. According to the self-tracing type scale and corrosion inhibitor, the fluorophore is covalently bonded to a polymer main chain, accurate online monitoring of the concentration of the agent is achieved, and the self-tracing type scale and corrosion inhibitor has excellent scale and corrosion inhibition performance.

The invention belongs to the technical field of oil exploitation, and particularly relates to a composite blocking remover and a preparation method and application thereof. The composite blocking remover comprises the following components in percentage by weight, comprising the following components in percentage by weight: 5 to 8 percent of hydrochloric acid, 1 to 3 percent of fluoboric acid, 0.5 to 2 percent of acetic acid, 0.5 to 1 percent of dodecyl trimethyl ammonium chloride, 0.1 to 0.3 percent of potassium chloride, 0.3 to 0.8 percent of sodium erythorbate, 0.2 to 0.5 percent of tetrasodium glutamate diacetate, 1 to 2 percent of ethylenediamine tetraacetic acid, 0.1 to 0.2 percent of inositol hexaphosphate, 0.1 to 0.2 percent of cocoanut fatty acid diethanolamide, 0.3 to 0.5 percent of sodium dodecyl benzene sulfonate, 0.3 to 0.5 percent of dimethyl diallyl ammonium chloride, 0.1 to 0.2 percent of ethylene glycol monobutyl ether and the balance of water. The composite blocking remover provided by the invention does not generate the problem of secondary precipitation, slows down the reaction speed of acid rocks, effectively pushes a blocking removal measure solution into the deep part of a stratum, enlarges the blocking removal radius, realizes deep treatment of the stratum, improves the acidification effect, and prolongs the effective action time of acidification.

The invention relates to the technical field of preparation of 2-methylallyl magnesium chloride, in particular to a preparation method of 2-methylallyl magnesium chloride, which comprises the following steps: pretreatment and initial feeding, reaction initiation, continuous reaction and heat preservation, end point judgment and product transfer. Magnesium is activated through a zinc stearate ethanol solution, zinc stearate can form an ultra-thin selective adsorption layer on the surface of magnesium particles, the layer cannot completely isolate the reaction, the reaction rate can be regulated and controlled, the risks of bumping and material flushing caused by too violent local reaction are avoided, and meanwhile, the service life of magnesium particles is prolonged. Ethanol is used as a solvent to assist zinc stearate to be uniformly attached to the surface of magnesium, and the dispersity of magnesium particles can be improved when the ethanol is subsequently mixed with tetrahydrofuran; tert-butyl p-hydroxyanisole is added into 2-methylallyl chloride to serve as a stabilizer, free radicals possibly generated in a reaction system can be captured, and side reactions such as polymerization and oxidation of 2-methylallyl chloride are inhibited.

The invention belongs to the technical field of synthesis of organic compounds, and relates to a synthesis method of drometrisiloxane, which comprises the following steps: carrying out Williamson etherification reaction on an ultraviolet light absorber UV-P and methyl allyl chloride to obtain an intermediate I; carrying out Claisen rearrangement reaction on the intermediate I to obtain an intermediate II; and carrying out hydrosilylation reaction on the intermediate II and heptamethyltrisiloxane to obtain dromethicone, the Williamson etherification reaction comprises the following steps: dissolving an ultraviolet light absorber UV-P in an alcohol ether solvent, and reacting with methyl allyl chloride under the condition of an acid-binding agent. According to the synthesis method of the drometrisiloxane, the etherification reaction is efficient, simple and convenient, the hydrosilylation reaction catalyst is high in efficiency, the solvent system is green and economical, the overall process is high in yield and purity, and the product quality is excellent.

The invention belongs to the technical field of synthesis of epoxy compounds, and discloses a preparation method of (methyl) epichlorohydrin. The preparation method comprises the following steps: (1) after tungstic acid reacts with hydrogen peroxide A, adding phosphoric acid for continuous reaction to prepare peroxyphosphotungstic acid; and (2) mixing the peroxy phosphotungstic acid prepared in the step (1) with allyl chloride or methyl allyl chloride dissolved with quaternary ammonium salt and a pH regulator, and adding hydrogen peroxide B for reaction to prepare epoxy chloropropane or methyl epoxy chloropropane. By adopting the preparation method provided by the invention to prepare the (methyl) epichlorohydrin, the procedures of liquid separation, drying and the like in the catalyst preparation process are omitted, the process steps are few, and hydrogen peroxide and a large amount of solvent can be saved while the process is simplified; and the prepared catalyst is high in selectivity, good in reuse effect and convenient to recycle and reuse.

This invention relates to the field of oil and gas field drilling and cementing technology, and in particular to a broad-spectrum anti-fouling isolation fluid for ultra-deep well cementing and its preparation method, comprising the following components: a zwitterionic nanocomposite polymer, a composite flushing agent, a weighting agent, and water; the zwitterionic nanocomposite polymer is an organic-inorganic hybrid copolymer with surface-silanized modified nano-silica as an inorganic crosslinking core, and polymeric segments copolymerized and grafted onto the surface of the inorganic crosslinking core; the monomers of the polymeric segments include N,N-dimethylacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, N-vinylpyrrolidone, dimethyl diallyl ammonium chloride, and isopentenyl polyoxyethylene ether; the composite flushing agent contains alkyl glycosides and alkyl sulfobetaine surfactants.

The invention discloses a preparation method of bismaleimide triazine resin for a BT (bismaleimide triazine) carrier plate, and belongs to the field of high polymer materials. The preparation method of the bismaleimide triazine resin comprises the following steps: S1, mixing bisphenol A, long-chain alkyl glycidyl ether and a first solvent, carrying out a heating reaction, and after the reaction is finished, carrying out post-treatment to obtain a modifier intermediate; s2, mixing the modifier intermediate, allyl chloride and a second solvent, carrying out heating reaction, and carrying out post-treatment after the reaction is ended, so as to obtain a modifier; and S3, mixing diphenylmethane bismaleimide, bisphenol A cyanate ester and the modifier, carrying out a heating melting reaction to obtain a resin prepolymer, and carrying out curing treatment on the resin prepolymer to obtain the bismaleimide triazine resin. The bismaleimide triazine resin provided by the invention has the effect of obtaining the bismaleimide triazine resin which is good in toughness and capable of effectively maintaining heat resistance.

The invention discloses a preparation method of methylallyl alcohol, which comprises the following steps: adding tricarboxylate into a reaction kettle, adding water for dissolving, heating and refluxing; dropwise adding methyl allyl chloride, and controlling the reaction temperature; cooling and filtering to obtain tricarboxylate solid and filtrate for later use; adding the tricarboxylate solid into a sodium hydroxide aqueous solution for reflux hydrolysis, cooling and layering to obtain methylallyl alcohol and tricarboxylate, and after separation, combining the tricarboxylate with the filtrate for recycling. The polycarboxylate obtained after esterification of the ternary carboxylate has small solubility in a solution, and an esterification product is a precipitate and can be naturally separated out; the esterification reaction can be carried out even under the condition of no catalyst, and the reaction is simple and rapid; then, the polybasic carboxylic ester can be separated through simple filtration, so that the emulsification phenomenon of the carboxylic ester in a water layer is overcome; and hydrolyzing the polybasic carboxylic ester to obtain corresponding alcohol and tricarboxylate, rectifying the alcohol to obtain the product methylallyl alcohol, and recycling the tricarboxylate.

This invention relates to a method for synthesizing N,N-dimethyl-2-[2-(2-propen-1-yloxy)ethoxy]-ethylamine, comprising the following steps: a) reacting 2-[2-(dimethylamino)ethoxy]ethanol with potassium hydroxide at 80℃~120℃ for 2h~6h; b) cooling the reaction solution from step a) to -5℃~5℃, then adding allyl chloride dropwise, maintaining the temperature at -5℃~5℃ for 1h~4h, and then raising the temperature to 10℃~35℃ for another 8h~30h. The method for synthesizing N,N-dimethyl-2-[2-(2-propen-1-yloxy)ethoxy]-ethylamine provided by this invention is simple, has few reaction impurities, produces a high-purity product with high yield, low energy consumption, and a simple post-processing procedure, making it suitable for industrial production and highly economical.

The invention discloses polymer microspheres and a preparation method thereof, a composite profile control agent and a water shutoff and profile control method, and belongs to the technical field of oil production engineering. The polymer microsphere comprises an inner core and a shell, the inner core is obtained by reacting a first monomer composition with a first cross-linking agent, the first monomer composition comprises at least one of acrylamide, acrylic acid, N-vinyl pyrrolidone, 2-acrylamido-2-methylpropanesulfonic acid and sodium p-styrenesulfonate, and the first cross-linking agent is at least one of N, N '-methylene bisacrylamide and tetraallyl ammonium chloride; the shell is obtained by reacting a second monomer composition with a second cross-linking agent, the second monomer composition comprises acrylamide, acrylic acid, methyl methacrylate and / or butyl acrylate, and the second cross-linking agent is at least one of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate and polypropylene glycol diacrylate. The profile control agent formed by the polymer microspheres and the phenolic resin cross-linking agent has excellent temperature resistance and salt tolerance.

The invention relates to a synthesis method of 2-methylallyl chloride, which comprises the following steps: by taking isobutylene chloride as a raw material, carrying out transposition rearrangement of free radical chlorine under the condition of ultraviolet irradiation to obtain the 2-methylallyl chloride. The method has the advantages that the process is simple, the conversion yield is high, the byproduct isobutenyl chloride in the process of preparing 2-methylallyl chloride through isobutene chlorination can be turned into wealth, and the additional value of the byproduct is improved.

The invention discloses a functional cyclodextrin polyether macromonomer as well as a preparation method and application thereof, the functional cyclodextrin polyether macromonomer is prepared by condensing cyclodextrin and alkynyl polyethylene glycol siloxane to prepare alkynyl cyclodextrin, and then the alkynyl cyclodextrin and an azido compound are subjected to click chemistry to obtain the functional cyclodextrin polyether macromonomer. The azido compound is prepared from allyl chloride or methyl allyl chloride and sodium azide, and the polycarboxylic acid admixture is prepared based on the polyether macromonomer. The functional cyclodextrin polyether macromonomer with a novel structure is efficiently prepared on the basis of click chemistry for the first time, the polycarboxylic acid additive is prepared on the basis of the polyether macromonomer, the polycarboxylic acid additive effectively improves the workability of concrete under a current concrete raw material system, and the concrete with a high water-binder ratio or a large volume has a good application prospect. The hydration heat release can be effectively controlled, the hydration heat release temperature peak is inhibited, the internal temperature rise of the concrete is reduced, and the generation of temperature cracks is reduced.

This application relates to a high-melting-point, high-whiteness methyl octabromoether flame retardant composition and its preparation method, belonging to the fields of fine chemicals and flame retardant preparation technology. The method includes: etherifying tetrabromobisphenol A, sodium hydroxide, and allyl chloride; purifying the mixture by isothermal crystallization at 30–50°C to obtain a tetrabromoether intermediate; dissolving the intermediate in dichloromethane and reacting it with bromine at 10–40°C; and finally, obtaining the finished product through post-treatment. This invention effectively removes impurities such as monoethers through a specific intermediate crystallization process, and avoids overheating and oxidation side reactions by combining low-temperature bromination and optimized solvent ratios. The obtained flame retardant has a melting point ≥106°C, whiteness R457 ≥92, and bromine content ≥67%, exhibiting advantages such as good thermal stability, low volatility, and high purity. The process conditions are mild and suitable for industrial production.

This application belongs to the field of organic synthesis and discloses a formaldehyde-free fixing agent based on a triazine-latent isocyanate functional monomer. It is prepared from triazine-latent isocyanate functional monomer (TLI monomer), dimethyl diallyl ammonium chloride (DMDAAC), and diallylamine as raw materials; the mass ratio of the triazine-latent isocyanate functional monomer, dimethyl diallyl ammonium chloride, and diallylamine is 10~30:30~48:10. This fixing agent uses the TLI monomer, which simultaneously integrates a triazine structure, hydroxyl groups, polymeric double bonds, and latent isocyanate groups, as its core. Through copolymerization with DMDAAC and diallylamine, a triple synergistic fixing system of "electrostatic adsorption-hydrogen bond anchoring-covalent crosslinking" is constructed, breaking through the performance bottleneck of traditional formaldehyde-free fixing agents in terms of wet rubbing fastness, and significantly improving the wet rubbing fastness of sensitive colors such as bright red and turquoise blue.

The invention discloses a polymer F-PDA as well as a preparation method and application thereof, the structural formula of the F-PDA is as shown in formula I. The F-PDA is prepared by copolymerizing a water-soluble fluorescent monomer (FM), acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) through an inverse emulsion polymerization method for the first time. By optimizing process parameters such as the initiator, the emulsifier and the oil-water ratio, the prepared polymer is high in characteristic viscosity and high in dissolution speed. The F-PDA has excellent flocculability and a fluorescence tracing function, the fluorescence intensity and the concentration of the F-PDA have an excellent linear relationship (R is greater than 0.99), and the lower detection limit reaches 1.03 * 10 <-6 > g / L. The system breaks through the bottleneck that a traditional flocculant cannot be accurately monitored in real time, provides key technical support for intelligent feeding and intelligent water quality management based on online monitoring, can be widely applied to sludge dewatering, river dredging and other scenes, and achieves cost reduction and efficiency improvement.

The invention belongs to the field of flotation reagent preparation, and particularly relates to a preparation method of allyl thiocarbamate, which comprises the following steps: carrying out substitution reaction on an aqueous solution containing water-soluble thiocyanate, allyl chloride and a phase transfer catalyst, then adding a water-insoluble organic matter, and separating to obtain an organic phase containing an allyl isothiocyanate intermediate; rOH and titanate are added into the organic phase, an addition reaction is carried out, and allyl thiocarbamate with the structure shown in the formula 1 () is prepared. Compared with the existing synthesis process of the allyl thiocarbamate, the process has the advantages that the step of removing water by reduced pressure distillation is omitted, the loss of the intermediate product allyl isothiocyanate in the distillation process is reduced, the separation time is saved, the whole preparation process is short in time and mild in condition, the yield of the allyl thiocarbamate is high, the production cost is low, and the process is more environment-friendly; the industrial production is facilitated.

The application relates to a high-temperature-resistant and salt-resistant modified organic resin polymer and a preparation method and application thereof, and belongs to the field of oilfield treating agents. The high-temperature-resistant and salt-resistant modified organic resin polymer comprises the following components in parts by weight: acrylamidoethyl dimethyl benzyl ammonium chloride 18-20 parts, 2-acrylamido-2-methylpropane sulfonic acid 14-16 parts, N-phenyl acrylamide 10-14 parts, N,N'-methylene bisacrylamide 0.5-0.9 parts, azobis-dicyanopentanoic acid 0.3-0.5 parts, N-vinyl caprolactam 10-12 parts, N-(hydroxymethyl)-2-methyl-2-acrylamide 10-12 parts, dimethyl diallyl ammonium chloride 8-10 parts, modified nanoscale montmorillonite 6-8 parts, polyethylene glycol dipropylene acid ester 0.3-0.5 parts and sodium bisulfite 0.1-0.2 parts. The application solves the problem of insufficient temperature resistance and salt resistance of polymer additives in the development of complex oil and gas fields.

The present application belongs to the technical field of oil and gas drilling engineering, and particularly relates to a polymer-coated inhibitor for strong inhibition drilling fluid and a preparation method thereof; the inhibitor is prepared by aqueous solution polymerization of acrylamide, acrylamidomethylpropane sulfonic acid, dimethyldiallylammonium chloride, vinyltrimethoxysilane and two novel inorganic modified compounds. The two inorganic modified compounds are a titanate intercalated magnesium aluminum tin silicate nanocomposite and a polyoxometalate grafted rare earth doped cerium dioxide nanorod, respectively. The former is prepared by coprecipitation and intercalation reaction, and the latter is prepared by hydrothermal synthesis and graft modification. The present application significantly improves the hydration inhibition capacity for shale, and can still maintain stable coating effect in high temperature and high salt environment, effectively solving the problem of wellbore instability. The preparation method is simple in process, the raw materials are all commercially available, and is suitable for industrial production, and has a broad application prospect in the field of water-based drilling fluid.