936 results about "Benzyl chloride" patented technology

The invention discloses a method for modifying biomass cracking oil to modified biomass oil through esterification, etherification and quality-improvement. The method comprises the following: step one, according to the proportion that the mass ratio of biomass cracking oil to benzyl chloride to alkaline solution to low-carbon alcohol is 100 to 80-100 to 40-80 to 10-20; and the biomass cracking oil, the low-carbon alcohol, the benzyl chloride and the alkaline solution are added into a reaction kettle, are heated at the temperature of between 90 and 110 DEG C to an infinite reflux state and react for 5 to 8 hours. Step two, after the infinite reflux reaction is finished, the mixture is cooled, condensed and layered; the lower layer is clear and transparent aqueous solution; black oil phase on the upper layer is separated, and is distilled under the condition that the temperature is 80 DEG C and the pressure is 10 kilopascal; low-carbon alcohol and water in oil phase are removed; the residual mixture is distilled under the condition that the temperature is between 130 and 150 DEG C and the pressure is 10 kilopascal; the unreacted benzyl chloride is reclaimed to obtain a product of black viscous liquid; and according to the proportion that the mass ratio of the product to ethanol is 3 to 1, the black viscous liquid is diluted and dissolved to obtain the modified biomass oil of which the PH value is between 5 and 7, the density is between 1.0 and 1.1 g / cm<3>, the water content is between 0.5 and 1.0 percent, the thermal value is between 25.0 and 35.0 kJ / g and the viscidity is between 135 and 150 mm<2> / s.

The invention relates to an antibacterial cation reactive dye, which comprises 3-phenyl-azo-4-hydroxy-5-[(4,6-dichloro)-1,3,5-triazine]amino-2,7-naphthalene disulfonate as a dye matrix, monochlorotriazine as a reactive group and a long carbon chain quaternary ammonium structure as a water soluble group. The chemical structure is as follows. The preparation method comprises the following steps: stirring and adding the 3-phenyl-azo-4-hydroxy-5-[(4,6-dichloro)-1,3,5-triazine]amino-2,7-naphthalene disulfonate to a polyethylene imine water solution, and isothermally reacting for 2-5 hours to obtain XPEI; then reacting with propylene oxide while stirring at a temperature of 0-5 DEG C for 5-8 hours to obtain TXPEI; and finally adding benzyl chloride, stirring and reacting at a constant temperature of 48-52 DEG C for 6-8 hours, layering the reaction liquid after reaction, and removing unreacted benzyl chloride by extraction to obtain the antibacterial cation reactive dye QXPEI. The antibacterial cation reactive dye has good antibacterial effect, good color fastness, good application prospects on dyeing and antibacterial finish of various fibers, simple preparation method, low cost, environment protection of raw materials, small environment pollution and industrial application prospects.

The invention discloses a preparation method of a magnetic fluorescence dual functional thermo-sensitive nano particle. The preparation method comprises the following steps: (1) preparing a nano particle core by a routine method, then packing the magnetic nano particle with a layer of silicon dioxide, performing cholromethylation on the silicon dioxide by utilizing a chloromethyl silane coupling agent, and leading benzyl chloride wrapped on the surface of the nano particle to react with carbon disulfide in the dimethylsulfoxide solution of potassium hydroxide so as to obtain a magnetic fluorescence nano particle the surface of which is modified with an RAFT reagent; and (2) utilizing the magnetic fluorescence nano particle obtained in step (1), a thermo-sensitive monomer, a sacrificed RAFT reagent and an initiating agent to form a polymerizing system and dissolving in solvent, carrying out reversible addition-fragmentation chain transfer (RAFT) living radical polymerization, and then performing separating to obtain the magnetic fluorescence dual functional thermo-sensitive nano particle with a nuclear shell structure. RAFT polymerization is directly carried out on the surface of the magnetic silicon oxide nano particle, thus facilitating the magnetic fluorescence dual functional nuclear shell structure to keep the stability of the structure and performance in the actual application process.

The invention provides a method for preparing superhigh-specific-area monodisperse polymer microspheres, which comprises the following steps: adding monomer, divinylbenzene, vinyl benzyl chloride, deionized water, initiator azodiisobutylamidine hydrochloride and co-stabilizer cetyl alcohol into a reaction vessel, carrying out ultrasonic dispersion in a cell crusher for 3 minutes, heating to 70 DEG C, reacting for 12 hours, centrifuging, washing and drying to obtain lightly-crosslinked monodisperse prepolymer microspheres; and swelling the monodisperse prepolymer microspheres, dispersion medium and Lewis acid catalyst at room temperature for 24 hours, heating to 80 DEG C, reacting for 8 hours, centrifuging, washing and drying to obtain the superhigh-specific-area monodisperse polystyrene microspheres. The particle size of the polystyrene microspheres is 600-750 nm, and the particle size distribution coefficient is less than 8.5; the maximum specific area can reach 1255 m<2> / g, and the maximum pore volume can reach 0.78 cm<3> / g; the average pore size is 2.3-2.7 nm, and the pore size distribution is narrow; and the maximum adsorption capacity for hydrogen can reach 2.15 wt%.

The invention relates to the field of biotechnology and discloses a kit for detecting fibrin (ogen) degradation products (FDP) by using emulsion immunoturbidimetry. The kit comprises an anti-human FDP antibody emulsion which is formed by performing chemical crosslinking of acidulated anti-human FDP antibodies and polyvinyl benzyl chloride emulsion particles and sealing the reaction product. The kit of the invention has the advantages that: the emulsion immunoturbidimetry is adopted to detect the FDP content, so the sensitivity is high and can reach 0.10 mu g / ml; the stability is high, the operation is simple and quick and it only takes 5 to 10 minutes to obtain a detection result; the specificity is high and the detection avoids interference effectively; and the quantification is accurateand the application range is wide.

The invention relates to a acidified corrosion inhibitor for oil well and preparation method thereof. The preparation has the steps of: firstly synthesizing imidazoline intermediate body, carrying out quaternization reaction with benzyl chloride, and then compounding generated quaternary ammonium salt and propiolic alcohol according to mass ratio 3:1 for obtaining the product. 0.4% (mass percentage content) of present corrosion inhibitor in 15% HCl medium has obvious inhibition for corrosion of N80 carbon steel. The corrosion rate is 0.70 g / mh after 4h of corrosion at 60 DEG C, the corrosion inhibition efficiency thereof can reach to 99.39%; the corrosion rate is 1.44 g / mh after 4h of corrosion at 90 DEG C, which is superior to oil and gas industry standard of the People's Republic of China SY / T5405-1996 corrosion evaluating indicator first grade product standard (at 60 DEG C, first grade product standard is 2-3g / mh; at 90 DEG C, first grade product standard is 3-4g / mh).

The invention discloses a method for preparing 2,5-dimethyl phenylacetic acid. The 2,5-dimethyl phenylacetic acid is a fine chemical engineering intermediate which is widely applied in fields of medicines and pesticides, and particularly is a key intermediate of spirotetramat serving as a novel insecticide. The method comprises the following steps of: mixing paraxylene serving as a raw material and ionic liquid serving as solvent with paraformaldehyde and concentrated hydrochloric acid, and performing a chloromethylation reaction to obtain 2, 5-dimethyl benzyl chloride; and performing a carbonylation reaction and a hydrolysis reaction of the 2, 5-dimethyl benzyl chloride and an acid-binding agent and the solvent in a reactor under the action of a catalyst to obtain the 2,5-dimethyl phenylacetic acid. The method has a novel process, short synthetic reaction steps, simplicity of operation, low production cost, high reaction yield, and environmental friendliness, and is suitable for industrial production.

The invention discloses a preparation method for a double quaternary ammonium side long chain anion-exchange membrane. The preparation method is characterized in that a dual-functional monomer with both tertiary amine group and quaternary ammonium group performs nucleophilic substitution on the main polymer chain with live benzyl bromine, benzyl chloride or chlorine acyl group, so as to obtain the double quaternary ammonium side long chain anion-exchange membrane. The raw materials are cheap and are easy to obtain, the preparation method is simple and is applicable to large scale industrial production, and the prepared anion-exchange membrane has the advantages of high ion conductivity, long service life, excellent mechanical property, and good solubility.

The invention discloses a new method to synthesize 2-[2-(3-methoxyphenyl)-ethyl] phenol(I). The new method is characterized in that the method takes salicylaldehyde as material to prepare 2-benzyloxy-benzyl chloride through benzyl protection, deoxidization and cl-substitution; 2- benzyloxy-benzyl chloride is turned to [[2-(benzyloxy) phenyl] methyl] diethyl phosphonate through Arbuzov reaction and then 1-benzyloxy-2-[2-(3-methoxyphenyl) ethylene] benzene is obtained through Witting-Hommer reaction; finally, 2-[2-(3-methoxyphenyl)-ethyl] phenol(I) is obtained through catalytic hydrogenation. The invention also discloses new intermediate compounds in the syntheticroute of synthesize 2-[2-(3- methoxyphenyl)-ethyl] phenol(I).

The invention relates to a preparation method of acidizing corrosion inhibitor in a high-temperature and concentrated acid environment. The preparation method is used for an acidification technology in carbonate oil reservoir exploration and overcomes the problem that existing high-temperature acidification corrosion inhibitor is poor in solubility and dispersion in use and prone to coking. According to the technical scheme, firstly, formaldehyde, benzene methanamine, absolute ethyl alcohol and concentrated hydrochloric acid are added into a three-necked flask, and then the three-necked flask is placed into an oil bath pan with the temperature being 110 DEG C for conducting a reaction for 2 hours; then, acetophenone is added, the pH is adjusted to 4 through concentrated hydrochloric acid, a reaction is conducted for 4 hours, and a coarse mannich base is obtained; thirdly, a vacuum rotary evaporation instrument is utilized for purification, separation is conducted, and a mannich base intermediate is obtained; fourthly, after the intermediate obtained in step 3 is washed, benzyl chloride is added, a reaction is conducted for 6 hours at the temperature of 110 DEG C, evaporation and separation are conducted through the vacuum rotary evaporation instrument, and mannich base quaternary ammonium salt is obtained; finally, potassium iodide is added in the mannich base quaternary ammonium salt stirring process for conducting mixed distribution, and the high-temperature acidizing corrosion inhibitor is obtained. The acidizing corrosion inhibitor has good solubility and dispersion, can further improve corrosion inhibition efficiency and is good in stability.

The invention relates to a purifying manufacture method for Yino sodium heparin that adopts long chain quaternary ammonium salt salinization heparin, after taking benzyl chloride esterification, gaining the raw Yino heparin raw product. After taking decoloration by active carbon and macropore adsorptive resin, the sodium heparin product could be gained. The invention is easy to realize industrializing producing.

The invention relates to a fluorescent probe used for conducting linkage detection on superoxide anions (O2.-) and hydrogen polysulfide, in particular to a fluorophore derivative for detecting superoxide anions and hydrogen polysulfide and application thereof. The fluorophore derivative is shown in the general formula I. In the general formula I, R1 represents a C1-22 alkyl group or a halogenated benzyl group or C1-C12 organic acid ester chains; R2 represents hydrogen, a sulfonic group or an amino group or a carboxyl group or a nitro group or halogen; X (a positioning functional group) represents -OH, a butyl triphenyl phosphonium group, an N-propyl morpholino group, a biotin group, a folic acid group, a glycosyl chain group, benzyl chloride or a C1-22 alkyl group; Y1 represents N, O or S; Y2 represents N, O or S. In the presence of the superoxide anions (O2.-) and the hydrogen polysulfide, corresponding fluorescence emission wavelength and intensity change, and the fluorescent probe can be used for detecting the superoxide anions (O2.-) and the hydrogen polysulfide in organisms, interference of external detection conditions can be greatly reduced, the detection signal to noise ratio is high, and sensitivity and selectivity are good. The fluorophore derivative has important significance in biomedicine.

The invention discloses an imidazoline quaternary ammonium salt corrosion inhibitor which is prepared from the following preparation raw materials including a corrosion inhibitor main component raw material and an additive raw material; the corrosion inhibitor main component raw material is one of oleic acid, benzoic acid, fatty acid, lauric acid and natural eleostearic acid; and the additive rawmaterial includes diethylenetriamine, dimethyl sulfate or benzyl chloride, boric acid and xylene. The invention also discloses a preparation method of the imidazoline quaternary ammonium salt corrosion inhibitor and aims at solving the problem of poor corrosion inhibition performance of the existing corrosion inhibitor in an acid medium. The preparation method is simple, is liable to operate and can perform recovery utilization on a solvent. An imidazoline corrosion inhibitor has the advantages of low toxicity, high slow release efficiency and wide use range. Physical characterization and performance test results of the corrosion inhibitor show that oleic acid imidazoline quaternary ammonium salt has better slow release performance, and the slow release performance of the benzyl chloride is better than the slow release performance of the dimethyl sulfate after being quaternized. A polarization curve test shows that synthesized corrosion inhibitors are all cathodal depression type corrosion inhibitors.

This invention relates to a method of producing benzyl chloride compound. First according to a certain mol ratio series inlet methyl benzene compounds and chlorine to reactor that coupled with fractionating tower, after reaction the material enter rectify section, then enter next order reactor to take chlorination reaction; under series stable operation condition, control the operating pressure of fractionating tower at 0.002 to 0.1 MPa. The chlorination is stimulated by sunlight or blue light, temperature of reactor is controlled at 80 to 120 deg. The mole fraction of benzyl chloride or chlor-benzyl chloride that series discharged from tower kettle could reach 99%upwards, manufacturing cost is low, and economic benefit high.

The invention provides a cross-linked quaternary phosphonium ionic liquid. The preparation method comprises the following steps: mixing 4-ethenyl benzyl chloride with triphenyl phosphonium at mol ratio of 1:1-1:1.5, heating to the room temperature to 60 DEG C, and reacting for 20-48h to obtain the quaternary phosphonium ionic liquid; mixing ethylene glycol dimethacrylate with the quaternary phosphonium ionic liquid at mol ratio of 1:1-5:1, adding azo diisobutyronitrile which is 1-5% of the total molar weight of the ethylene glycol dimethacrylate and the quaternary phosphonium ionic liquid, heating to the temperature of 60-90 DEG C, and reacting for 20-48h; and washing reaction products by acetone and tetrahydrofuran in turn to obtain the cross-linked quaternary phosphonium ionic liquid. Experiment proves that the cross-linked quaternary phosphonium ionic liquid catalyst provides high catalytic activity to a reaction of CO2 epoxy compound for generating five-membered cycle compound, and has very high selectivity and high conversion rate. Reaction conditions are optimized, yield is up to 99.2%, and the selectivity is 100%.

The invention relates to a synthetic oilfield flooding compounded corrosion inhibitor which takes imidazole type ionic liquid synthesized by a two-step method as a controlled-release host and the other added compounds as auxiliary controlled-release agents. A preparation method of the corrosion inhibitor for the novel ionic liquid oil field water comprises the following steps: (1) at a certain temperature, mixing N-methylimidazole with n-butyl bromide or benzyl chloride, reacting while stirring, washing and removing unreacted substances after reaction is carried out for hours, thus obtaining halide of N-methylimidazole; (2) mixing the product obtained in the step (1) with a selected compound, adding a solvent, stirring for reacting for a period of time at a certain temperature, extracting a reaction solution, washing, and removing the solvent, thus obtaining the target products; and (3) compounding the products obtained in the step (2) with urotropine, OP-10, potassium iodide and thiourea in a certain proportion, thus obtaining the corrosion inhibitor with extremely high corrosion inhibition efficiency. The preparation method of the corrosion inhibitor for the novel ionic liquid oil field water has the advantages that raw materials are simple and available, the operational process is easy and safe, the reaction time is short, the cost is low, the yield is high, the corrosion inhibition performance is strong, the corrosion inhibitor for the novel ionic liquid oil field water is applicable to industrial large-scale production, and the practicability is strong.

The invention relates to a high-temperature acidifying inhibiter and a preparation method thereof. The high-temperature acidifying inhibiter comprises the following materials in parts by weight: 79.33-87.68 of ethanol, 19-21 of methanoic acid, 22.33-24.68 of aniline, 31.11-34.39 of acetophenone, 26.13-28.88 of methanal, 31.54-34.86 of benzyl chloride and 8.55-9.45 of propiolic alcohol, wherein theethanol, the methanoic acid and the aniline are placed into a reaction kettle to be stirred; then the acetophenone is added into the reaction kettle; then a methanal solution is dripped into the reaction kettle; the benzyl chloride is added into the reaction kettle after the methanal solution is dripped into the reaction kettle; the temperature of the reaction kettle is reduced to room temperature, and then the propiolic alcohol is added into the reaction kettle to be stirred. The water content inside the reaction kettle is low without adding an aqueous hydrochloric acid solution so as to prevent the benzyl chloride from hydrolyzing and be beneficial to reducing the unit consumption of the benzyl chloride in the quaterisation reaction process; before the methanal is completely dripped, the amount of the methanal dripped into the reaction kettle is less than the reaction mole ratio of synthetic Mannich base, the methanal is in an insufficient state so as to reduce the volatilization ofthe methanal, ensure the health of operators and be safer.

The invention discloses a high conductivity cross-linked organic phosphate polybenzoimidazole high temperature proton exchange membrane and preparation method thereof. The polybenzoimidazole is adopted as the polymer substrate. Through polymerization reaction and the adoption of vinyl benzyl chloride as the cross-linking agent, the self-cross-linking of polybenzoimidazole and Vinyl phosphate is conducted to form the membrane, which can be adopted for the preparation of homogeneous phase high temperature proton exchange membrane. The membrane not only can enhance the adsorption site of phosphoric acid, thus enhancing the conductivity of the membrane, but also can hugely reduce the phosphoric acid loss of polybenzoimidazole / phosphoric acid film, effectively enhance the conductivity stability of the membrane. Under non-wetting condition the membrane has the advantages of excellent proton conductive capability, and low air permeability. The membrane can be adopted for the high temperature proton exchange membrane fuel cell, direct alcohol fuel cell, electrochemical sensor and other electrochemical devices.

The invention discloses a preparation method of a depolymerized and dispersed viscosity reducer of heavy oil. The preparation method comprises selecting N,N-Dimethyloctadecylamine as a hydrophobic group monomer, and diethylene triamine, epoxy chloropropane and benzyl chloride as hydrophilic group monomers, and ethanol as a solvent. The preparation method sequentially comprises the following steps: (1) adding the N,N-Dimethyloctadecylamine (N,N-Dimethylhexadecylamine) and the ethanol to a reaction vessel with a stirring device, evenly mixing and keeping the mixture at constant temperature for 0.5h; (2) slowly dripping the epoxy chloropropane with a dropping funnel to the reaction vessel, heating to 70 DEG C-75 DEG C, and reacting for 1-4h to generate HDI-1; (3) dripping the epoxy chloropropane to the diethylene triamine at room temperature to generate HDI-2; (4) allowing reaction products in (3) and (2) to react to generate HDI-3; and (5) dripping the benzyl chloride with the dropping funnel to the HDI-3, evenly stirring the mixture, and reacting at increased temperature of 90-95 DEG C for 2-5h to obtain the target product HD.

The invention discloses an anion-exchange membrane and a preparation method thereof. The preparation method comprises the following steps of: mixing a macromolecular reinforcing agent, a polymerizing monomer, an initiator and a cross-linking agent to obtain a casting solution; sequentially coating and heating the casting solution to form a macromolecular copolymer; and then carrying out quaterisation treatment to obtain the anion-exchange membrane. According to the invention, the cross-linking agent containing multifunctional groups is added to the preparation process of the anion-exchange membrane; benzyl chloride groups in the macromolecular copolymer, formed by polymerizing monomers, and amino groups contained in the cross-linking agent are nucleophilically substituted, and meanwhile, cardo in the macromolecular reinforcing agent and primary amine groups contained in the cross-linking agent are lactamized, so that the macromolecular reinforcing agent and the macromolecular copolymer are cross-linked by using the cross-linking agent, the phase-splitting between the macromolecular copolymer and the macromolecular reinforcing agent is avoided, and the stability of the membrane is improved. Meanwhile, the method can be used for avoiding use of an organic solvent and has remarkable economic and environmental benefits.

The invention discloses a method for synthesizing a stilbene compound by utilizing a Kornblum oxidation reaction. In the method, substituted benzyl chloride is taken as a raw material, DMSO, namely dimethyl sulfoxide is adopted to prepare a corresponding substituted benzene formaldehyde compound through Kornblum oxidation and a target product stilbene compound is prepared through Wittig-Horner condensation. The method is simple and practicable, has safe reactant in the synthesizing process, moderate reaction condition and high yield, is suitable for industrialization production of various stilbene compounds, such as benximode, rosewood stilbene, resveratrol, oxidized resveratrol and piceatannol and the like, and is further applied to the pharmaceutical field.

The present invention provides process of preparing Butenafine hydrochloride. Under the catalysis of phase transfer catalyst and in water as the reaction solvent, p-tert-butyl benzyl chloride and N-methyl-1-naphthyl methylamine react to produce Butenafine hydrochloride. The preparation process is simple, uses no toxic organic solvent, and has less environmental pollution, lowered cost, raised yield and shortened production period.

The invention discloses a diverting acid acidification corrosion inhibitor and a preparation method thereof, belonging to the technical field of oilfield chemicals. According to the mass percentage of the present invention, the components of the corrosion inhibitor are quaternary ammonium salt, octylphenol polyoxyethylene ether, propynyl alcohol, butynediol, methylpentynyl alcohol, cinnamaldehyde, methanol and water. The present invention is compound alkylpyridine, quinoline, benzyl chloride, ethylene glycol, water, react and synthesize quaternary ammonium salt, and carry out with octylphenol polyoxyethylene ether, methanol, propynyl alcohol, cinnamaldehyde, water, etc. Compounding, the present invention aims to overcome the disadvantages of poor compatibility and poor corrosion inhibition effect in the existing corrosion inhibitor technology in the use of oil field diverting acid. The process route is simple, the synthetic product has no three wastes pollution, the cost is low, the raw materials are easy to purchase, and the advantages are convenient to use and the like.

The invention provides a method for preparing 2, 4, 5-trifluoro-phenylacetic-acid. The method adopts 1, 2, 4-trifluoro-benzene to react with polyformaldehyde and chlorinating agent to obtain 2, 4, 5-trifluoro-benzyl chloride, and adopts the 2, 4, 5-trifluoro-benzyl chloride to react with cyaniding agent in ionic liquid to obtain 2, 4, 5-trifluoro-benzyl cyanide, and then the 2, 4, 5-trifluoro-benzyl cyanide is hydrolyzed in acid or alkalic conditions to obtain the 2, 4, 5-trifluoro-phenylacetic-acid. The preparation method for preparing 2, 4, 5-trifluoro-phenylacetic-acid requires cheap and available materials, and has moderate reaction conditions, less three-wastes and better safety; industrialized production can be easily realized, the product purity is high, and quality is stable, thuscompletely meeting the using requirement of 2, 4, 5-trifluoro-phenylacetic-acid as a pharmaceutical intermediate.

The invention discloses a high-temperature O2 / CO2 corrosion inhibitor for coiled tubing. The high-temperature O2 / CO2 corrosion inhibitor for the coiled tubing is used by matching an agent A mainly used for deoxidizing and an agent B mainly used for resisting corrosion of carbon dioxide, wherein the agent A is acetone oxime, D-ascorbic acid, sodium sulfite or ferrous sulphate; and the agent B is formed by mixing the components in percentage by weight: 20-30 percent of quaternary pyridine salt, 10-15 percent of mannich base chelate, 3-7 percent of surfactant and 48-67 percent of solvent. The quaternary pyridine salt is obtained by reacting pyridine with benzyl chloride; and the mannich base chelate is obtained by aldehyde ketone amine condensate generated by morpholine, trioxymethylene and dimethylamine through a mannich reaction with metal chloride. The corrosion inhibitor provided by the invention has use temperature up to 170DEG C, is suitable for a water-corrosive medium in which oxygen and carbon dioxde coexist and can be used for effectively inhibiting the corrosion of media such as the oxygen and the carbon dioxide and ensuring safe operation of the coiled tubing in the production process.

The invention discloses a toluene desorption process in tail gas produced in the benzyl chloride production, which adopts benzyl chloride as a toluene absorbent to input the tail gas produced in the benzyl chloride production to an absorbing tower from the bottom part, a benzyl chloride liquid flows out through the bottom part of the absorbing tower and enters a desorbing tower after being preheated, the toluene obtained after atmospheric distillation operations in the desorbing tower is directly input to the benzyl chloride production, the benzyl chloride liquid flowing out from the bottom part of the desorbing tower undergoes multi-level cooling and is fed to the absorbing tower from the top part so as to spray and absorb the toluene in the tail gas produced in the benzyl chloride production, as well as enabling the desorption process to form the absorption and desorption cycling production. The process can effectively recover the toluene in the tail gas produced in the benzyl chloride production, and make the toluene be directly used in the benzyl chloride production, thereby reducing the product consumption of benzyl chloride production, product costs, discharge of pollutant toluene and the environmental pollution, and the process also greatly improves the product quality of byproduct hydrochloric acid.

The invention provides an oil field iron steel material corrosion inhibitor and a preparation method thereof. The corrosion inhibitor is a homopolymer of alkyl imidazoline, and the molecular weight of the homopolymer is 2000-6000. The preparation method mainly comprises the following three steps: firstly, enabling low polyacrylic acid to react with a polyamine compound to prepare polypropylene acid-base imidazoline; secondly, enabling the polypropylene acid-base imidazoline to react with benzyl chloride to prepare alkyl polypropylene acid-base imidazoline; thirdly, performing reduced pressure distillation to separate out unreacted excessive micromolecular raw materials. According to the invention, the novel polymer corrosion inhibitor can be used for forming multi-point adsorption on a metal surface through multiple imidazoline heterocyclic ring groups in molecules, so that the binding force of the corrosion inhibitor on the metal surface is enhanced, and further the corrosion inhibition efficiency is improved.

The invention discloses enoxaparin sodium. The average molecular weight of the enoxaparin sodium is between 3500-5500 dalton, thrombolytic biological activity is 100-125IU / mg, and the ratio value of resistance to Xa and IIa resistance is between 3.3-5.3. A production purification method of the enoxaparin sodium comprises preparation of heparin benzyl chloride ammonium salt, preparation of heparin benzyl ester, purification of heparin benzyl ester, preparation of enoxaparin sodium and purification of enoxaparin sodium. By means of the enoxaparin sodium, the molecular weight and distribution range of a product are controlled, and the quality of a fine enoxaparin sodium product meets the quality standard of the european pharmacopoeia. The enoxaparin sodium adopts a crude product of heparin sodium as an initial raw material and can effectively reduce production cost. The refined heparin benzyl ester stabilizes the final quality of the product. Purification difficulties are simplified, the coloring problem in the production is effectively solved, and the product quality is improved.

The invention relates to a process for synthesizing resveratrol by using de-methylation technology, which comprises using 3,5,4'-trimethoxyl diphenyl ethylene as raw material, using aluminium chloride / pyridine as catalyst for synthesizing Resveratrol through demethyl process, and employing market available methoxyl benzyl chloride for Wittig reaction with 3,5- dimethoxybenzaldehyde, thus preparing intermediate 3,5,4'-trimethoxyl diphenyl ethylene.

The invention relates to a method for preparing dibenzyl disulfide. The innovation points of the invention are that: water is taken as a reaction solvent; Na2S2, benzyl chloride and a catalyst are mixed and then react; the reaction temperature is between 30 and 50 DEG; the reaction time is between 10 and 40 minutes; the temperature of a reaction liquid is cooled to 20 DEG C after the reaction is finished; the pH value is adjusted to 7; and a separated organic phase is washed, dried and purified to obtain the dibenzyl disulfide. The method uses trioctylmethylammonium chloride as the catalyst to perform a catalytic reaction on the mixed Na2S2 and benzyl chloride, and has high yield of finished products which is improved by 15 to 20 percent compared with the prior synthetic method; and the method greatly reduces reaction time and reaction temperature, is easy to control reaction process, has few byproducts, and reduces the consumption of energy sources.