19 results about "Butyl chloride" patented technology

The invention discloses a sectional neutralization and waste heat coupled acid-containing wastewater treatment method, relates to the technical field of industrial wastewater treatment, is suitable for HCl / alcohol-containing acid wastewater generated by chlorobutane and other devices, and has the technical key points that the method comprises the following steps: S1, detecting pH, conductivity and temperature on line; s2, sequentially adding lime milk for coarse neutralization, sodium carbonate for fine adjustment and magnesium hydroxide for buffering, stabilizing the pH value to 7.0-8.0, and adjusting the adding rate according to a deviation-time relationship; and S3, feeding the neutralization solution into a steam stripping device, and carrying out waste heat recovery. According to the method, lime milk is used for bearing main acidity, a small amount of sodium carbonate and magnesium hydroxide are used for stabilizing a terminal point, alkali consumption and scaling risks are reduced, terminal pH fluctuation is improved, and a consistent technological parameter basis is provided for butanol steam stripping and energy recovery.

A method for producing Fmoc-O-tert-butyl-L-glutamic acid includes the following steps: S1: N-fluorenylmethoxycarbonyl-L-glutamic acid (Fmoc-Glu), potassium carbonate, tert-butyl chloride, and dichloromethane are added sequentially to a reaction vessel. Nitrogen gas is then introduced into the reaction vessel, and the reaction is carried out under nitrogen protection by stirring at room temperature; S2: After the reaction is completed, the reactants are removed from the reaction vessel, and an appropriate amount of water is added to extract the organic phase. The organic phase is then washed with saturated brine; S3: After washing, the organic phase is dried with anhydrous sodium sulfate, filtered to remove sodium sulfate, and dichloromethane is recovered by vacuum distillation to obtain a crude product; S4: The crude product is dissolved in ethyl acetate, and the insoluble matter is removed by filtration. The ethyl acetate is then recovered by vacuum distillation to obtain Fmoc-O-tert-butyl-L-glutamic acid.

In one embodiment the application pertains to a process which provides longer chain and less isomerized (more linear molecules). A propylene-derived olefin mixture is reacted under suitable conditions to form a mixture of oligomers in the presence of a catalyst comprising alkyl aluminum halide complex. A suitable alkyl aluminum halide complex comprises ethyl aluminum dichloride bis(2-chloroethyl) ether complex which may be used with a tert-butyl chloride or other initiator.

The invention belongs to the field of p-tert-butyltoluene, and discloses a preparation process for catalytic synthesis of p-tert-butyltoluene by using an ionic liquid, the p-tert-butyltoluene comprises the following components by weight: 50-60% of toluene, 30-35% of tert-butyl chloride, 5-10% of an ionic liquid catalyst, 0.1-1% of an acid-base regulator, 0.5-2% of an auxiliary agent, and 0-5% of a by-product. The preparation process comprises seven steps of ionic liquid catalyst preparation, reactor preparation, reaction, reaction completion and cooling, product separation and purification, catalyst recovery and reutilization and final product treatment. The method realizes efficient synthesis of p-tert-butyltoluene, is environment-friendly and economical, and is suitable for industrial application, and the catalyst is easy to recover.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing 2-chlorobutane. According to the method, sec-butyl alcohol and hydrogen chloride are used as raw materials, the fly ash-based catalyst is adopted for continuous reaction in the fixed bed reactor to synthesize 2-chlorobutane, and the purity of 2-chlorobutane exceeds 99.5% and the yield of 2-chlorobutane is 98% through continuous synthesis. Besides, the method for continuously synthesizing the 2-chlorobutane by the fixed bed reactor is coupled with the kettle type reaction, so that the waste hydrochloric acid generated in the continuous synthesis of the 2-chlorobutane by the fixed bed reactor can be effectively utilized, and the method and the kettle type reaction can share a set of post-treatment system, so that the equipment investment of a construction project is reduced.

The application provides a synthesis method of 1,2,3,4-tetrachlorobutane and belongs to the technical field of organic synthesis. The synthesis method comprises the following steps: mixing 1,3-butadiene and halogenated alkane in a protective gas environment to obtain a mixture; introducing liquid chlorine into a sealed environment filled with the protective gas, and then adding the mixture into the liquid chlorine dropwisely at 30-40 DEG C to obtain 1,2,3,4-tetrachlorobutane. The reaction environment in the whole synthesis process is safe, a large amount of waste water is not generated, a large amount of chlorine waste gas is not generated, the raw material conversion rate is high, and the product yield is high and stable.

The application discloses a production method of preparing tetrabutyl tin with single solvent, and particularly relates to the technical field of organic compound synthesis. The application solves the technical problems of large solvent loss, high energy consumption of separation, complex water removal process and low product yield in the traditional THF and toluene mixed solvent process. In the application, isopropyl ether is used as single solvent, magnesium and chlorobutane are used to generate butylmagnesium chloride in the isopropyl ether; then, tin tetrachloride is dropped into the mixture, and tetrabutyl tin and anhydrous magnesium chloride are generated by continuous stirring reaction; hydrochloric acid is added to the system to dissolve the solid precipitate, and the upper organic phase is obtained by standing and separating; finally, the isopropyl ether is recovered by normal pressure distillation, and the tetrabutyl tin is obtained by reduced pressure distillation. The application realizes efficient recovery and recycling of the solvent by using the low boiling point and water insolubility of the isopropyl ether; and the molecular sieve drying step is omitted by using the in-situ water absorption property of the by-product anhydrous magnesium chloride.

The invention provides a method for removing tert-butyl chloride in a butyl rubber production process, which comprises the following steps: firstly, mixing a heavy component mixture containing tert-butyl chloride obtained in a butyl rubber generation process with an alkaline solution, adding a phase transfer agent, heating, and standing for layering to obtain an oil phase; and finally, washing and dehydrating the oil phase obtained in the previous step, and carrying out reduced pressure distillation to obtain recovered isoprene. The method provided by the invention is mild in reaction process and easy in condition control, and is an effective method for removing tert-butyl chloride. According to the invention, the isoprene in the heavy component generated in the butyl rubber production process can be successfully recovered, the utilization rate of the isoprene is improved, and the additional value of the heavy component is improved; the alkali washing method for removing the tert-butyl chloride is simple in operation process, mild in condition, high in removal efficiency, low in cost and more suitable for industrial popularization and application.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing 1-chlorobutane through a fixed bed gas-solid catalytic reaction. The method comprises the following steps: filling an activated carbon supported catalyst into a fixed bed reactor; the active components of the active carbon supported catalyst are composed of ZnCl2, FeCl3 and KCl; preheated hydrogen chloride and vaporized n-butyl alcohol are introduced into a fixed bed reactor and are in contact with the activated carbon supported catalyst for a catalytic reaction, mixed gas containing 1-chlorobutane is obtained, and the mixed gas is cooled and then subjected to gas-liquid separation to obtain 1-chlorobutane. According to the method, n-butyl alcohol and hydrogen chloride are taken as raw materials, a fixed bed reactor is filled with the active carbon supported catalyst, gas-solid catalytic reaction is carried out, 1-chlorobutane is continuously produced, and many defects existing in an existing 1-chlorobutane liquid phase method production route and a gas phase method using aluminum oxide and a molecular sieve catalyst are overcome.

In one embodiment the application pertains to a process which provides longer chain and less isomerized (more linear molecules). A propylene-derived olefin mixture is reacted under suitable conditions to form a mixture of oligomers in the presence of a catalyst comprising alkyl aluminum halide complex. A suitable alkyl aluminum halide complex comprises ethyl aluminum dichloride bis(2-chloroethyl) ether complex which may be used with a tert-butyl chloride or other initiator.

Metal-containing films (e.g., molybdenum and molybdenum carbide films) are deposited on a semiconductor substrate in a deposition process conditioned by the addition of halogen-containing activator molecules (e.g., alkyl halides, halosilanes, or I2). In some implementations, a substrate is contacted first with a metal-containing precursor (e.g., MoCl5), followed by a halogen-containing activator (e.g., tert-butyl chloride), followed by a reducing agent (e.g., H2). The treatment may be repeated multiple times as needed to form a film of a desired thickness. In some embodiments, a metal film is formed and deposited on the substrate inside the recessed feature by such methods to fill the recessed feature. In other embodiments, a metal carbide film (e.g., a molybdenum carbide film) is deposited by these methods as a liner between the dielectric layer and the metal layer.

The present invention belongs to the technical field of H-acid preparation and provides an extractant for extracting nitrotoluic acid from H-acid denitrification solution. Its preparation method includes uniformly mixing solvent oil, phenyl ether, and di-N235, and then adding a quaternary ammonium saltification reagent (benzyl chloride, n-butyl chloride, n-octane, n-dodecane) under stirring at 100-120 °C and reacting for 2-3 hours. An extractant for extracting nitronaphthalenesulfonic acid is prepared. When using this extractant to extract H-acid denitrification solution, compared with the commonly used extractants at present, mainly nitronaphthalenesulfonic acid is extracted, the alkali used for back extraction is saved by two-thirds, and the content of the back extraction solution is increased to more than 15%.

The invention provides a preparation method of 2, 2 '-di (diphenylphosphino methylene)-1, 1'-biphenyl and a derivative thereof. The preparation method comprises the following steps: (1) mixing triphenylphosphine with a first solvent to obtain a first mixed solution; tert-butyl chloride and a second solvent are mixed to obtain a second mixed solution; mixing 2, 2 '-bis (halogenated methyl)-1, 1'-biphenyl and / or a derivative thereof with a third solvent to obtain a third mixed solution; (2) enabling the first mixed solution to flow through a metal lithium column, enabling the first mixed solution and the second mixed solution to enter a first micro-mixer, and then enabling the first mixed solution and the second mixed solution to enter a first micro-channel reactor for reaction to obtain a first reaction solution; (3) the first reaction solution and the third mixed solution enter a second micro-mixer and then enter a second micro-channel reactor for reaction, and 2, 2 '-bis (diphenylphosphino methylene)-1, 1'-biphenyl and / or derivatives thereof are obtained, the preparation method is short in reaction time and high in yield.

The application belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing 1-chlorobutane through a fixed-bed gas-solid catalytic reaction. The method comprises the following steps: loading an activated carbon supported catalyst into a fixed-bed reactor; the active component of the activated carbon supported catalyst is composed of ZnCl2, FeCl3 and KCl; preheated hydrogen chloride and vaporized n-butanol are introduced into the fixed-bed reactor to contact the activated carbon supported catalyst to perform a catalytic reaction, and a mixed gas containing 1-chlorobutane is obtained; and after cooling, the mixed gas is subjected to gas-liquid separation to obtain 1-chlorobutane. The method uses n-butanol and hydrogen chloride as raw materials, loads the activated carbon supported catalyst into the fixed-bed reactor, and continuously produces 1-chlorobutane through a gas-solid catalytic reaction, thereby overcoming many deficiencies existing in the current production route of 1-chlorobutane through a liquid phase method and the use of an alumina and molecular sieve catalyst through a gas phase method.

The invention discloses an anti-aging biodegradable material and a preparation method thereof, and relates to the technical field of high polymer materials. When the anti-aging biodegradable material is prepared, rutin and ethyl chlorophosphate epoxypropyl ester react to prepare modified rutin; the preparation method comprises the following steps: polymerizing ionone dimethyl glutarate, alpha-hydroxyl-omega-carboxyl oligomeric lactic acid, 1, 6-hexanediol and 3-(1H-imidazole-1-yl) propane-1, 2-diol to obtain oligomeric lactic acid copolyester; the straw powder and 4-(1, 1, 1, 3, 5, 5, 5-heptamethyltrisiloxan-3-yl) butyl chloride are subjected to a reaction, and modified straw powder is prepared; and uniformly mixing the oligomeric lactic acid copolyester, the modified straw powder and the modified rutin, and performing injection molding in an injection molding machine to obtain the anti-aging biodegradable material. The anti-aging biodegradable material prepared by the invention has excellent anti-aging, flame-retardant and mechanical properties.

The present invention improves productivity of 1,2,3,4-tetrachlorohexafluorobutane by converting a by-product and the like generated by a chlorination reaction of 1,3-butadiene into a valuable substance 1,2,3,4-tetrachlorohexafluorobutane in a method for producing 1,2,3,4-tetrachlorohexafluorobutane using 1,3-butadiene as a starting raw material.　The method for producing 1,1,2,3,4-pentachloro-1,2,3,4,4-pentafluorobutane involves: (a) a step for bringing a composition containing at least one selected from the group consisting of 1-chloro-1,3-butadiene, 1,3,4-trichloro-1-butene, and 1,1,4-trichloro-2-butene into contact with chlorine (Cl2) to obtain a composition containing 1,1,2,3,4-pentachlorobutane; and (b) a step for bringing a composition containing 1,1,2,3,4-pentachlorobutane obtained in the step (a) into contact with fluorine (F2) to obtain a composition containing 1,1,2,3,4-pentachloro-1,2,3,4,4-pentafluorobutane. The method for producing 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane involves, in addition to the steps (a) and (b), (c) a step for bringing the composition containing 1,1,2,3,4-pentachloro-1,2,3,4,4-pentafluorobutane obtained in the step (b) into contact with chlorine monofluoride (ClF) to obtain a composition containing 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane.

The present application discloses a method for treating waste liquid containing butyl, which belongs to the field of chemical engineering technology. In this method, 1-chlorobutane is converted into n-butanol by an alkaline resin, and n-butyl acetate is hydrolyzed to n-butanol under an alkaline reagent, and then high-purity n-butanol is recovered by extractive distillation. This method enables the efficient recovery of n-butanol from the waste liquid and returns it to the front end as a raw material for input. Moreover, the resin and extractant used in this method can be reused. The treated waste liquid is easy to handle and has low cost. The present application reduces the production cost of preparing glufosinate and reduces environmental pollution, and has high industrial application value.

The invention belongs to the field of drug synthesis, and particularly relates to a preparation method of bumetanib, which specifically comprises the following steps: S1) performing etherification reaction on starting materials 4-hydroxy-3-nitro-5-sulfonamido benzoic acid and bromobenzene to obtain an intermediate 1; s2) reducing the intermediate 1 by ferrous sulfate to obtain an intermediate 2; s3) carrying out amination reaction on the intermediate 2 through chloro-n-butane to obtain an intermediate 3; and S4) carrying out hydrolysis reaction through sodium hydroxide to obtain bumetanib. The invention provides a preparation method of bumetanib, 4-hydroxy-3-nitro-5-sulfonamido benzoic acid is used as a raw material, etherification, reduction, amination and hydrolysis reactions are adopted, the etherification yield of the process is high, expensive palladium-carbon catalysts do not need to be used in the steps of reduction and amination, special equipment is avoided, the operation of amination and hydrolysis is simple, the reaction is simple, and the yield is high.