208 results about "Benzyl chloride" patented technology

The invention discloses a p-methyl benzyl chloride production process and a production system thereof, p-xylene side chains and chlorine are subjected to a gas phase substitution reaction under micro negative pressure and visible light catalysis to generate crude methyl benzyl chloride and hydrogen chloride, and 99.0% methyl benzyl chloride, a small amount of benzyl dichloride and 31% hydrochloric acid are respectively generated through rectification and absorption; the device consists of four working sections of chlorination, rectification, hydrochloric acid absorption and distillation. According to the method, the defects in the prior art are overcome, on one hand, chlorine is introduced, and an aromatic ring chlorination reaction is carried out under visible light catalysis; on one hand, a supported catalyst filler is arranged at the bottom of a chlorination tower, and a zeolite molecular sieve modified by long-chain alkylsilane and supported by metal salt is used as a catalyst to catalyze chloromethylation reaction, on the other hand, the hydrophobicity of the modified catalyst is obviously enhanced, and meanwhile, the density of acidic sites is not reduced; the contact opportunity of the catalyst and a reaction substrate is greatly increased, and the catalytic efficiency of the catalyst is improved.

The invention discloses a quaternary ammonium salt modified linalool derivative as well as preparation and application thereof. The structure of the quaternary ammonium salt modified linalool derivative is shown as a formula (I). The quaternary ammonium salt modified linalool derivative is prepared by carrying out nucleophilic substitution reaction on linalool and benzyltrimethylammonium chloride. The derivative can be applied to water-based disinfectants or antibacterial daily necessities. The derivative has good water solubility and bactericidal activity. Through the synergistic interaction of the quaternary ammonium salt group and the linalool mother nucleus, the disinfection and sterilization capacity of the linalool derivative is remarkably improved compared with that of independent quaternary ammonium salt or linalool, and the linalool derivative particularly has a better disinfection and killing effect on pathogens of a quaternary ammonium salt-resistant disinfectant. # imgabs0 #

The invention relates to the technical field of membrane separation, in particular to a preparation method of a pH-step-by-step thermocuring regulation sodium-magnesium separation nanofiltration membrane. The method comprises the following steps: (1) pre-treating a base membrane; (2) preparation and treatment of an aqueous phase solution: S1, preparing the aqueous phase solution according to mass fraction: sequentially adding 1.2%-1.6% of piperazine, 0.10%-0.14% of triaminopyrimidine and 0.14%-0.18% of polyethylene glycol into deionized water, and stirring until the piperazine, the triaminopyrimidine and the polyethylene glycol are completely dissolved to form the aqueous phase solution; s2, adjusting the pH value of the water-phase solution to 10-11 by using hydrochloric acid; s3, pouring the water-phase solution of which the pH is adjusted on the surface of the pretreated base membrane, standing, and blow-drying to form a uniform water-phase layer; (3) interfacial polymerization reaction: S1, preparing an oil phase solution: adding 0.10-0.14% of trimesoyl chloride into n-hexane, and performing ultrasonic treatment until the trimesoyl chloride is completely dissolved; s2, pouring the oil-phase solution on the surface of the base membrane subjected to water-phase treatment, and after reaction, pouring out redundant solution to form a polyamide separation layer, so as to obtain a membrane sheet; (4) performing a step-by-step thermocuring process; and (5) cleaning and storing.

The invention relates to the technical field of benzyl alcohol preparation, and provides a benzyl alcohol rectification method and device capable of reducing generation of high-boiling residues, the rectification method comprises the following steps: S1, benzyl chloride and an alkali solution are subjected to a hydrolysis reaction, and then reaction liquid is subjected to oil-water separation to obtain an oil-phase material and a water-phase material; s2, adding the oil-phase material obtained in the step S1 into a stirring kettle, adding recycled water generated after desalting the water-phase material, stirring, and adding alkali liquor into the stirring kettle at the same time; and S3, carrying out oil-water separation on the oil-water mixture in the step S2, and transferring an oil phase into a rectifying tower for rectification. After oil-water separation of the reaction liquid, stirring an oil phase with recycled water in a stirring kettle to elute brine water droplets entrained by the oil phase, and adding a trace amount of strong alkali into the stirring kettle at the same time, so that the rectified raw oil carries water and the trace amount of strong alkali to be alkaline; hCl generated by hydrolysis of benzyl chloride is prevented from forming an acidic environment in a gas phase and a liquid phase of the whole tower, so that benzaldehyde and benzyl alcohol are prevented from generating a condensation reaction under an acidic catalysis condition to generate a high-boiling residue.

The invention provides a polybenzyl chloride type monomolecular resin photoresist based on an adamantane structure as well as a preparation method and application of the polybenzyl chloride type monomolecular resin photoresist. According to the invention, the advantages of non-chemically amplified photoresist and monomolecular resin are combined, and a series of monomolecular resin based on adamantane core and periphery grafted benzyl chloride groups are synthesized. The series of compounds are simple in synthesis process, have very high thermal stability and good film-forming property, and can meet the requirements of a photoresist process. Electron beam and extreme ultraviolet lithography show that the series of photoresist materials are expected to meet the requirement of high-resolution lithography.

The invention discloses a synthesis method of an aryl bidentate phosphine compound, which comprises the following steps of: (1) reacting benzene or alkylbenzene with benzyl chloride or 4-alkyl benzyl chloride at 0-100 DEG C for 0.5-5 hours in the absence of oxygen and under the condition of a lewis acid catalyst to prepare a first intermediate; (2) dropwise adding an alkyl lithium reagent into tetramethylethylenediamine at the temperature of-30 to 40 DEG C under the conditions of no water, no oxygen and a solvent, stirring for 1 to 3 hours, dropwise adding the first intermediate into the mixed solution at normal temperature, and reacting for 4 to 20 hours at the temperature of-20 to 40 DEG C to prepare a second intermediate; and (3) under anhydrous and anaerobic conditions, adding diphenyl phosphine chloride into the second intermediate obtained in the step (2), and reacting at-20 to 80 DEG C for 5-60 hours to obtain the aryl bidentate phosphine compound. The synthesis method disclosed by the invention is simple in process, mild in condition and high in product yield, and has a relatively good industrial prospect.

The invention discloses a nanofiber functional dressing for wound healing of burns and scalds, and belongs to the technical field of wound repairing dressings. The dressing is prepared through double-layer electrostatic spinning and comprises a hydrophilic nanofiber layer and a hydrophobic nanofiber layer. The hydrophobic nanofiber layer is prepared by electrostatic spinning of an antibacterial composite modified material and isocyanate-terminated oligomeric lactic acid, and the antibacterial composite modified material is prepared by acylating chlorination of (9I)-2, 4, 8, 10-tetraoxaspiro [5.5] undecane-3, 9-dipropionic acid, reaction of the acylating chlorination product and N, N-bis (2-benzimidazole methyl) amine, and quaternization of benzyl chloride. The tetrooxaspiro rigid structure improves the thermal stability and inhibits the molecular chain from absorbing water and expanding; the quaternized benzimidazole group destroys cell membranes through positive charges, and can efficiently resist bacteria. An amido bond in the hydrophilic layer and a urea bond formed by the antibacterial material and an isocyanate group remarkably improve the liquid absorption capacity; the hydrophobic layer provides mechanical support and ductility; two layers of interfaces are fused through heat treatment, the overall tearing strength is improved, and the joint movement requirement is met.

The invention relates to the technical field of corrosion inhibitors, and discloses a preparation method of a modified imidazoline corrosion inhibitor, which comprises the following steps: carrying out quaternization reaction on tertiary amine group in an imidazoline intermediate and chlorine in benzyl chloride to generate quaternary ammonium salt, introducing hydroxyl, and continuing to carry out esterification reaction with boric acid group in 4-aminophenylboronic acid to obtain the modified imidazoline corrosion inhibitor. The modified imidazoline corrosion inhibitor is prepared by the following steps of: firstly, introducing amino groups, then carrying out amidation reaction with acyl chloride groups in 4-vinyl benzoyl chloride, introducing alkenyl groups, and finally carrying out click reaction with sulfydryl groups in DSB-TA, so as to generate the modified imidazoline corrosion inhibitor. The modified imidazoline corrosion inhibitor disclosed by the invention has a relatively good corrosion inhibition effect.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of an anti-cracking modified EVA cable material.The preparation method comprises the steps that maleic anhydride, N, N-bis (2-aminoethyl) methylamine, benzyl chloride and HDPE serve as raw materials, antibacterial modified HDPE is prepared through a dehydration ring-closing one-step method and a solution method, and the anti-cracking modified EVA cable material is obtained; the preparation method comprises the following steps: taking antibacterial modified HDPE as a raw material, then taking benzotriazole, bis (2-chloroethyl) amine, 3-chloropropyltrimethoxysilane and magnesium hydroxide as raw materials, performing substitution reaction and polymerization reaction to prepare anti-ultraviolet modified magnesium hydroxide, and finally taking antibacterial modified HDPE, EVA, the anti-ultraviolet modified magnesium hydroxide, red phosphorus and the like as raw materials, and performing melting method to prepare the anti-cracking modified EVA cable material. The anti-cracking modified EVA cable material prepared by the preparation method disclosed by the invention has relatively good anti-cracking performance, antibacterial performance, flame-retardant performance and anti-ultraviolet performance.

The invention relates to the technical field of high polymer materials, and discloses a synthesis method of low-chlorine polyphenylene sulfide nitrile, which comprises the following steps: carrying out pressurized prepolymerization reaction on a sodium sulfide solution and p-dichlorobenzene to obtain a first prepolymerization reaction product; carrying out copolymerization prepolymerization reaction on the first prepolymerization reaction product and 2, 6-dichlorobenzonitrile to obtain a second prepolymerization reaction product; carrying out heating polymerization reaction on the second prepolymerization reaction product and benzyl chloride to obtain a heating polymerization reaction product; and raising the temperature of the polymerization reaction product, and carrying out phase separation to obtain the low-chlorine polyphenylene sulfide nitrile. Under the condition of no auxiliary agent, the polymerization process of inert gas pressurization and phase separation is adopted, benzyl chloride is applied to adjust the end group, low-chlorine high-molecular-weight polyphenylene sulfide nitrile can be obtained in a short time, the production efficiency of synthesizing polyphenylene sulfide nitrile can be improved, the purification process of byproduct sodium chloride is shortened, auxiliary agent recovery is omitted, and the production cost is reduced. The engineering construction investment is reduced, and the production cost for manufacturing the polyphenylene sulfide nitrile is greatly reduced.

The invention provides a preparation method of 2, 5-disubstituted benzyl chloride, and belongs to the technical field of preparation of drug intermediates. The chloromethyl solution is prepared from concentrated hydrochloric acid and paraformaldehyde, the concentration of hydrochloric acid is gradually reduced along with the reaction, and the reaction progress is slow due to the reduction of the concentration of concentrated hydrochloric acid; therefore, the chloromethylation reaction is carried out on the chloromethyl liquid and the disubstituted benzene in the hydrogen chloride gas, and the hydrogen chloride gas is supplemented, so that the concentration of the hydrogen chloride is increased, and the chloromethylation reaction is accelerated; meanwhile, a gradient heating mode is adopted, disubstituted benzene and chloromethyl liquid are subjected to chloromethylation reaction for 2-3 hours at the temperature of 50-60 DEG C, and the temperature is increased to 70-80 DEG C after the concentration of hydrogen chloride is reduced, so that the chloromethylation reaction is accelerated again, and the yield of the product is increased. According to the method, the volatilization and consumption of concentrated hydrochloric acid can be reduced, the generation of wastewater is reduced, the reaction time is shortened, and meanwhile, the yield of 2, 5-disubstituted benzyl chloride is also improved.

The invention relates to the technical field of high polymer materials, and discloses a double quaternized QPVBC / QBPEI anion exchange membrane and a preparation method and application thereof.The preparation method comprises the steps that 4-vinyl benzyl chloride, an azo initiator and a free radical polymerization reaction solvent are subjected to free radical polymerization, then quenching, sedimentation and drying are conducted, and poly 4-vinyl benzyl chloride is obtained; the preparation method comprises the following steps: carrying out quaternization on poly (4-vinylbenzyl chloride), a first quaternization reagent and a first organic solvent, and then curing to obtain quaternized poly (4-vinylbenzyl chloride); carrying out condensation reflux on the branched polyethyleneimine, a second quaternization reagent and a second organic solvent, and then carrying out rotary evaporation and drying to obtain quaternized branched polyethyleneimine; and carrying out stirring and cross-linking reaction on the quaternized poly (4-vinyl benzyl chloride), the quaternized branched polyethyleneimine and a third organic solvent to obtain the double quaternized QPVBC / QBPEI anion exchange membrane. The double quaternized QPVBC / QBPEI anion exchange membrane disclosed by the invention has excellent anion transmission capacity and has potential application value in the field of fuel cells.

The present application belongs to the field of rare earth separation, and particularly discloses a method for separating heavy rare earth ions. In the method, a vinyl complexing agent including at least one of vinyl phosphonic acid, vinyl sulfonic acid, vinyl acetic acid or 4-vinyl benzyl chloride is used to selectively complex heavy rare earth ions in an aqueous phase, so as to obviously increase the distribution coefficient between different heavy rare earth ions. Then, the aqueous phase containing the complex of heavy rare earth ions is subjected to extraction separation of different heavy rare earth ions with an organic phase containing an extractant, so as to achieve the purpose of improving the separation efficiency.

The invention belongs to the technical field of insecticides, and particularly relates to a synthetic method of a hexythiazox intermediate, which comprises the following four steps: S1, preparing erythro-1-p-chlorophenyl-2-amino-1-bromo-propane; s2, preparation of the erythro-1-p-chlorophenyl-2-aminopropanethiol, and preparation of the erythro-1-p-chlorophenyl-2-aminopropanethiol; s3, preparation of the trans-1-p-chlorophenyl-2-amino-propyl-O-isopropyl thiocarbonate hydrochloride, and preparation of the trans-1-p-chlorophenyl-2-amino-propyl-O-isopropyl thiocarbonate hydrochloride; and S4, preparation of a hexythiazox intermediate, namely, trans-5-(4-chlorphenyl)-4-methyl thiazolidone. According to the invention, the use of highly toxic carbon disulfide, corrosive chlorosulfonic acid, carcinogenic benzyl chloride and other high-risk reagents is completely abandoned, the operation risk is reduced, no malodorous gas is discharged, the occupational health and safety of operators and the environment are fundamentally guaranteed, meanwhile, the generation of acidic wastewater and sulfur-containing hazardous waste is solved, and the production cost is reduced. And a green chemical atom economy principle is met.

The invention relates to the technical field of petroleum drilling fluid loss reduction, and discloses an anti-divalent salt fluid loss agent for drilling fluid, which is prepared by the following steps: step 1, beta-cyclohexylamine and 6-chloro-1-hexene are subjected to a reaction to obtain alkenyl beta-cyclohexylamine; step 2, initiating polymerization of alkenyl beta-cyclopentadiene, a hyperbranched monomer pentaerythritol triallyl ether and 2-acrylamide-2-methylpropanesulfonic acid under the action of azobis (isobutylamidine hydrochloride), so as to obtain an intermediate A; 3, 3-dimethylamino-1-propylamine and palmitic acid are subjected to a reaction, and an intermediate 2 is obtained; 4, the intermediate 2 and benzyl chloride are subjected to a reaction, and quaternary ammonium salt modified fatty acid is obtained; and 5, stirring and mixing the intermediate A, quaternary ammonium salt modified fatty acid and coupling agent modified walnut powder to obtain the divalent salt resistant filtrate reducer for the drilling fluid. The anti-divalent salt filtrate reducer for the drilling fluid has a relatively good anti-divalent salt effect.

The utility model relates to the technical field of dilution kettles, and discloses a biphenyl benzyl chloride dilution kettle which comprises a dilution kettle main body, the upper surface of the dilution kettle main body is connected with a top cover in a sliding manner, the bottom end of the top cover is fixedly connected with a feeding pipe, the interior of the top cover is in threaded connection with a bolt, the outer wall of the bolt is arranged in the dilution kettle main body in a penetrating manner, and the feeding pipe is fixedly connected with the feeding pipe. A storage box is fixedly connected to the upper surface of the top cover, a conveying pump is fixedly connected to the upper surface of the storage box, an extraction pipe is fixedly connected to the input end of the conveying pump, and the outer wall of the extraction pipe is fixedly connected to the interior of the storage box. According to the device disclosed by the utility model, the storage box, the delivery pump, the extraction pipe, the delivery pipe I, the connecting pipe, the shunt pipe, the delivery pipe II and the nozzle are matched, so that a diluent is pushed and injected into the dilution kettle, and the diluting and mixing efficiency is improved while the diluent is added more uniformly.

The invention belongs to the field of catalyst preparation technology and application, and relates to preparation of a Pd / C catalyst and a method for synthesizing phenylacetic acid from benzyl chloride by using the Pd / C catalyst. The method comprises the following steps: S1, preparation of a Pd / C catalyst: preparing a high-dispersity, high-activity and stable catalyst by improving the process, obtaining a high conversion rate by only using 0.2% of the catalyst, and having excellent reusability; and S2, synthesizing phenylacetic acid: taking benzyl chloride and CO as raw materials, adding the prepared high-activity Pd / C catalyst, and optimizing a reaction process to obtain high-yield and high-purity phenylacetic acid. The prepared catalyst shows an excellent catalytic effect, the production method is simple in step and mild in reaction condition, the yield of the obtained phenylacetic acid is relatively high, the used solvent can be recycled, the cost is greatly saved, and the method is suitable for large-scale industrial production.

This application relates to a UV-3 ultraviolet absorber and its preparation method, belonging to the field of chemical synthesis technology. The preparation method employs a one-pot process, in which benzocaine reacts with triethyl orthoformate in xylene solvent. This step utilizes reactive distillation coupling control, continuously removing the generated alcohol distillate through a distillation separation device to promote reaction equilibrium shift, obtaining a xylene solution of the intermediate NET. Subsequently, the solution is heated to a reaction temperature of 135–145°C, and benzyl chloride is added dropwise for N-alkylation, while a tail gas absorption device absorbs byproduct gases. The reaction slurry is then cooled for crystallization, solid-liquid separation, and drying to obtain the UV-3 product. This invention simplifies the production process through a one-pot process, avoids the use of toxic DMF solvent, and solves the technical problem of raw material residues leading to subsequent side reactions in the one-pot process through reactive distillation coupling control, resulting in a final product with high purity and high yield.

The present invention relates to the technical field of the preparation of macrocyclic compounds, specifically a preparation method and application of a novel fluorescent macrocyclic compound. The preparation method synthesizes a dialdehyde-substituted intermediate through a Suzuki coupling reaction; the obtained intermediate is reduced to benzyl alcohol and then converted into benzyl chloride; benzyl chloride and 1,4-bis(bromomethyl)benzene are subjected to a Friedel-Crafts reaction to obtain a monomer; under the catalysis of boron trifluoride diethyl ether, the monomer is cyclized to obtain a bromine-chain-substituted macrocyclic compound; the bromine-chain-substituted macrocyclic compound reacts with trimethylamine in ethanol to obtain a water-soluble fluorescent macrocyclic compound. By designing and synthesizing the novel fluorescent macrocyclic compound, the present invention can generate singlet oxygen in vitro, effectively encapsulate antibacterial drugs, and perform bacterial imaging at the same time. Through the synergistic effect, the macrocyclic compound enhances the efficacy of antibacterial drugs, overcomes the problems of drug resistance and reduced drug efficacy of traditional antibacterial agents, and provides a new strategy for antibacterial treatment.

This invention discloses a microcapsule, its preparation method, and its applications, belonging to the field of bioprotective materials. The microcapsule has a tertiary spherical or near-spherical particle structure, including a core layer, a shell layer covering the core layer, and satellite layers anchored to the outer surface of the shell layer. The core layer includes an active ingredient and a hydrophobic carrier medium. The shell layer is a cross-linked polyurethane-polyurea wall material formed by interfacial polymerization of polyisocyanate and polyols or polyamines containing hydrophilic segments. The satellite layers include active units and bridging and stabilizing units. The active units include benzalkonium chloride or benzyl chloride. The satellite layers exist in the form of nanoparticles or molecular clusters with a size of 10-150 nm. This invention, applied to bioprotective materials, solves the problem of efficient co-loading and intelligent sequential release of multipolar active substances in existing microcapsules. It possesses antiviral, antibacterial, antifungal, and anti-mite functions, a long service life, and features controllable and reproducible processes.

The application discloses a kind of dodecacyclo triene functionalized flame-retardant polyphenyl ether oligomer and its synthesis method, application, belong to polymer synthesis technical field, dodecacyclo triene is combined with P-H bond compound and is added by radical initiation to contain phosphorus dodecacyclo diene;Again with 2,6-dimethylphenol is added by Lewis acid catalysis to obtain phosphorus-containing dodecacyclo bisphenol;Subsequently with 2,6-dimethylphenol is catalyzed by copper complex and is oxidized and polymerized, and phosphorus-containing dodecacyclo polyphenyl ether oligomer is generated;After terminal functionalization under the basic condition of vinyl benzyl chloride, copolymerization is carried out with peroxide, and the target flame-retardant polyphenyl ether oligomer is prepared.The application introduces dodecacyclo triene bulky rigid cyclic structure in polyphenyl ether oligomer molecular chain, constructs integrated intrinsic flame-retardant system, and the combustion performance of material can be stabilized to reach V-0 grade, and excellent low dielectric, low loss performance is endowed to material.

The application provides an anti-carbon dioxide corrosion inhibitor, a preparation method and application thereof, and relates to the technical field of oil and gas field corrosion protection. The application provides an inhibitor, raw materials of which include alpha-lipoic acid, diethylene triamine, formaldehyde, 2-naphthyl ethyl ketone and benzyl chloride in a molar ratio of 1.0-1.2:0.8-1.2:1.2-2.0:1.0-1.4:1.0-1.4. The application also provides a preparation method, raw materials are taken according to the molar ratio, alpha-lipoic acid and diethylene triamine are mixed to obtain a first product through reaction; formaldehyde and 2-naphthyl ethyl ketone are mixed with the first product to obtain a second product through reaction; benzyl chloride and the second product are mixed to obtain a finished product inhibitor through reaction. The application also provides application of the inhibitor in preventing carbon dioxide corrosion. The inhibitor has good corrosion inhibition effect, a simple preparation method, a stable structure, and still has superior corrosion inhibition effect in a high salinity environment.

The present invention relates to a copper electroplating solution, a copper electroplating solution additive, and a preparation method thereof. The solution comprises an accelerator, an inhibitor, and a leveler. The accelerator is sodium polydipropylene glycol sulfonate, the inhibitor is polyethylene glycol-6000, and the leveler is an azoaromatic benzyl quaternary ammonium salt compound. The additive is used as a leveler in the copper electroplating solution. The leveler is pyridinium benzyl ammonium chloride, having the structural formula: #imgabs0#. The additive is synthesized from pyridine and benzyl chloride. Compared with the prior art, the present invention can effectively shorten the electroplating time and achieve super filling without voids or gaps even in blind vias with higher aspect ratios.

The application provides a synthesis method of active piperidone alkaloid, and the active piperidone alkaloid is Dysidone A. The raw material piperidine is used as a substrate, and the substrate is reacted with p-methoxy benzyl chloride under the condition of N,N-diisopropylethylamine, so that the secondary amine is protected, and the side reaction of sodium hydride and hydrogen on the secondary amine is avoided. Then, the secondary amine is oxidized under the condition of iodine and iodobenzenediacetic acid. Next, the secondary amine is reacted with triethyl phosphine acetic acid ester to obtain an alpha, beta unsaturated ester. Then, the p-methoxy benzyl protection is removed by using ammonium cerium nitrate in a mild and efficient manner. Finally, the ester is reduced into an alcohol by using diisobutylaluminum hydride. The piperidone alkaloid or the like is obtained through five reaction steps. The synthesis process is simple, the raw material is cheap and easy to obtain, the cost is low, the reaction condition is relatively mild, the purity is high, and the method has good economic and social benefits.

The invention discloses a papermaking filler wrapping agent and an aqueous two-phase polymerization preparation method thereof, and the preparation method of the papermaking filler wrapping agent comprises the following steps: taking acrylamide as a main monomer, mixing a hydrophobic cationic monomer with a rigid benzyl chloride side group as a split-phase promoting component, mixing functional cationic and anionic monomers, and carrying out a polymerization reaction to obtain the papermaking filler wrapping agent. The preparation method comprises the following steps: polymerizing in an aqueous two-phase system dissolved with ammonium sulfate, sodium sulfate and polyethylene glycol, keeping the polymerization temperature at 30-60 DEG C, and initiating aqueous two-phase one-step polymerization by adopting a redox initiation system. Compared with traditional emulsion polymerization, the preparation method of the filler wrapping agent does not need harmful substances such as organic solvents and emulsifiers, the filler wrapping agent can be prepared through one-step polymerization only by taking simple inorganic salt or hydrophilic high-molecular substances as a phase-splitting agent, and the filler wrapping agent has the advantages of being easy and convenient to prepare, environmentally friendly, high in shear resistance, high in filler retention rate and the like.

The utility model belongs to the technical field of benzyl chloride production tail gas treatment, and particularly relates to a tail gas treatment device for benzyl chloride production, which comprises a treatment box, a plurality of annular pipes fixedly mounted on the inner wall of the treatment box, a plurality of spray heads fixedly mounted on the inner sides of the annular pipes, and a filter screen fixedly mounted in the treatment box and positioned below the annular pipes, a gas distribution pipe is arranged in the treatment box and located at the top of the filter screen; one end of the gas distribution pipe penetrates through the treatment box and is fixedly provided with a gas inlet pipe; the water supply assembly is located in the treatment box and used for supplying water into the annular pipes; according to the tail gas purification device, dust and particulate matters in tail gas can be adsorbed and wetted by water and then settle down along with water flow, the purification effect is achieved, water resources can be reutilized, it is guaranteed that the water resources can be saved, harmful substances in the tail gas can be adsorbed, it is guaranteed that the harmful substances in the tail gas cannot be discharged to the outside, and the environmental protection effect is achieved. The pollution to the environment is avoided.

The method discloses a green synthesis process of acetylene alcohol double Grignard reagent, and the synthesis process comprises the following steps: dissolving benzyl chloride in an organic solvent to prepare solution A, adding metal magnesium to solution A to initiate a reaction, and preparing an initiation reaction solution; (2) dissolving benzyl chloride and acetylene alcohol substances in an organic solvent to prepare solution B; (2) adding solution B in step (2) to the initiation reaction solution in step (1) dropwise to perform a reaction, and preparing acetylene alcohol double Grignard reagent. The application provides a new synthesis method for synthesizing acetylene alcohol double Grignard reagent by using benzyl magnesium chloride, which can avoid a coupling side reaction between benzyl Grignard reagent and benzyl chloride, and does not need excessive metal magnesium.

The invention discloses a preparation method of 4-chloromethylstyrene, and belongs to the technical field of synthesis of organic intermediates. 4-bromobenzaldehyde is adopted as a raw material and reacts with ethylene glycol under the action of p-toluenesulfonic acid to generate an intermediate 1; reacting with magnesium metal to generate a Grignard reagent, reacting with acetaldehyde, and hydrolyzing to generate an intermediate 2; finally, under the combined action of methyl dichlorosilane and tri (pentafluorophenyl) boron, the product 4-chloromethyl styrene is generated. The raw materials can be obtained in the market, the reaction of dehydrating benzyl alcohol into olefin and directly chlorinating aldehyde group to generate benzyl chloride is completed by a one-step method under the combined action of methyl dichlorosilane and tris (pentafluorophenyl) boron, the operation is simple and convenient, the overall yield is high, and a route reference is provided for synthesizing the compounds.

The present invention belongs to the field of tertiary oil recovery technology, and in particular to a zwitterionic drainage agent and a synthesis method thereof. The synthesis method is as follows: N-(2-aminoethyl)morpholine, ethanol, and benzyl chloride are sequentially added to a four-necked flask, the pH value is adjusted with a sodium hydroxide solution, heated, kept warm, and the pH is maintained to be not less than 8; sodium chlorosulfonate is added, heated to reflux, and the pH is maintained to be not less than 8; vacuum distillation, heating to dissolve, adjusting the pH value, extraction, and liquid separation are performed; the extract is transferred to a four-necked flask, dodecyl bromide and solid potassium carbonate are added, refluxed, filtered, the filtrate is cooled, a solid is precipitated, and dried overnight to obtain a product drainage agent. The present invention has the advantages of simple synthesis process, low surface interfacial tension, low critical micelle concentration, and high drainage rate.

The present application embodiment proposes a method for detecting the content of dimethyl monoethanolamine and its use. The detection method includes: under alkaline conditions, reacting dimethyl monoethanolamine standard solutions of different concentrations with 4-nitrobenzyl chloride in a water bath to obtain standard samples of different concentrations; performing high-performance liquid chromatography ultraviolet detection on the standard samples of different concentrations to obtain the peak area of dimethyl monoethanolamine in the standard samples of different concentrations; and obtaining a linear equation for the corresponding relationship between concentration x and peak area y; performing high-performance liquid chromatography ultraviolet detection on the sample to be tested to obtain the peak area of dimethyl monoethanolamine in the sample to be tested, and calculating the concentration of dimethyl monoethanolamine in the sample to be tested; the detection method provided by the embodiment of the present application can more accurately detect the dimethyl monoethanolamine content in hydroxypropyl bis-hydroxyethyl dimethyl ammonium chloride, and the detection method is more efficient.