16 results about "1-Chloropropane" patented technology

This invention relates to "a method for synthesizing monobromotrifluoropropylene," belonging to the field of organic chemical synthesis. In this method, pentachloropropane (CCl3-CH2-CHCl2), bromine gas (Br2), and anhydrous hydrogen fluoride (HF) are reacted with a fluorination catalyst to generate monobromotrifluoropropylene (CF3-CBr=CH2) in the gas phase. This invention utilizes inexpensive and readily available raw materials; the product separation and purification are simple; it is easy to industrialize; and it generates minimal industrial waste.

The application discloses a method for preparing epichlorohydrin, which comprises the following steps: reacting a mixture containing chloropropene, hydrogen peroxide, polyhydric alcohol, a catalyst and an ionic surfactant in a batch kettle reactor to obtain a product containing epichlorohydrin. Compared with the traditional method, the reaction has less by-products, the product after the reaction of hydrogen peroxide is water, the addition of the ionic surfactant and the polyhydric alcohol promotes the mixing of the organic phase and the aqueous phase into a homogeneous phase, improves the selectivity, a large amount of solvent does not need to be added, solvent evaporation and recovery processes are avoided, the process is energy-saving and environment-friendly, the equipment process is simple, the yield and the selectivity are high, the method is suitable for large-scale production in industry, has great economic benefits, solvent evaporation and recovery are not needed, is beneficial to the production amplification in industry, the equipment maintenance cost is low, the system cost is relatively low, the environmental pollution is small, the operation is simple, the method is easy to repeat, and epichlorohydrin can be efficiently produced.

The utility model discloses a kind of DD mixed agent rectification anticorrosion system, including the pipeline connection of dichloropropane preseparation unit, dichloropropane product unit, cis-dichloropropene product unit and trans-dichloropropene product unit in turn, wherein, dichloropropane product unit, cis-dichloropropene product unit, trans-dichloropropene product unit's reflux pipeline and dichloropropane preseparation unit's feed place are respectively installed one for water removal water remover, dichloropropane product unit, cis-dichloropropene product unit and trans-dichloropropene product unit are also respectively pipeline connection to separation vacuum pump unit.The utility model adds water remover in the key position point of rectification system, remove moisture in system by high efficiency and low consumption, to reduce the formation of corrosion in system.

This invention provides a synthesis process for olafron and its application, comprising the following steps: mixing a solvent, octadecylamine, and triethylamine, then pumping the mixture with 2-bromo-1-ethanol into a continuous flow reactor; extracting the reaction solution after the reaction and purifying it to obtain OLF-A1; mixing OLF-A1, a solvent, and potassium carbonate, heating the mixture and adding 3-bromo-1-chloropropane to react; extracting the reaction solution after the reaction and purifying it with silica gel to obtain OLF-A2; mixing OLF-A2, a solvent, and potassium carbonate, heating the mixture and adding diethanolamine; extracting the reaction solution after the reaction and purifying it to obtain OLF-A3; mixing OLF-A3 and a dehydrating agent, then adding hydrofluoric acid, heating and stirring, concentrating the mixture, and purifying it to obtain the finished product, olafron. This invention solves the problems of excessive impurities and low yield in conventional processes by optimizing the reaction apparatus and purification methods for intermediate synthesis, providing technical support for the efficient synthesis of olafron.

The application discloses a process for preparing epichlorohydrin, which comprises the following steps: passing a homogeneous mixture containing chloropropene, hydrogen peroxide, polyhydric alcohol and ionic surfactant into a fixed bed reactor to react, and obtaining a product containing epichlorohydrin. Compared with the traditional method, the reaction by-product is less, the product after hydrogen peroxide reaction is water, the ionic surfactant and the polyhydric alcohol are added to promote the mixing of the organic phase and the aqueous phase into a homogeneous phase, improve the selectivity, a large amount of solvent does not need to be added, solvent evaporation recovery and other processes are avoided, the process is energy-saving and environment-friendly, the equipment process is simple, the yield and the selectivity are high, the process is suitable for large-scale production in industry, has great economic benefits, solvent evaporation and recovery are not needed, is beneficial to industrial production amplification, the equipment maintenance cost is low, the system cost is relatively low, the environmental pollution is small, the operation is simple, the process is easy to repeat, and the epichlorohydrin can be efficiently produced.

The present invention relates to a process for producing 1-chloro-3,3,3-trifluoropropene. The present invention relates to a process for producing 1-chloro-3,3,3-trifluoropropene comprising a step i) of contacting in a reactor hydrofluoric acid (HF) and a starting composition comprising at least one chlorinated compound selected from 1,1,3,3-tetrachloropropene (1230za), 1,3,3,3-tetrachloropropene (1230zd) or 1,1,1,3,3-pentachloropropane (240fa) or mixtures thereof to produce a stream A comprising 1-chloro-3,3,3-trifluoropropene (1233zd), characterized in that said step i) is carried out in a liquid phase poor in HF.

The application discloses a production system and method of an epoxy chloropropane modified wet strength agent, and belongs to the technical field of biomass conversion. Corn stalks are used as biomass raw materials, components are separated through eutectic solvent pretreatment, bio-based monomers are prepared through enzymatic saccharification and directional fermentation of cellulose components, and bio-based polyester PEFF particles are obtained through melt polycondensation. Then, diethylenetriamine and bio-based adipic acid are used to prepare a polyamide polyamine prepolymer, and the polyamide polyamine prepolymer and the PEFF particles are used to prepare a PAA-co-PEFF composite prepolymer aqueous solution through ester-amide exchange reaction. Then, the composite prepolymer and pretreated epoxy chloropropane are used to perform controllable crosslinking reaction, and after thin film evaporation and deep dechlorination through a double-tower series fixed bed adsorption tower, the product is finally obtained through oxidation coupling and graft modification with tannin extract, pH adjustment, dilution and filtration.

The application discloses a synthesis method of epichlorohydrin, at least comprising the following steps: passing a homogeneous mixture containing chloropropene, hydrogen peroxide, polyhydric alcohol and ionic surfactant into a continuous reactor to react, and obtaining a product containing epichlorohydrin. Compared with a traditional method, the application has less by-products, the product after hydrogen peroxide reaction is water, the ionic surfactant and the polyhydric alcohol are added to promote the mixing of an organic phase and an aqueous phase into a homogeneous phase, improve selectivity, a large amount of solvent does not need to be added, solvent evaporation recovery and other processes are avoided, the process is energy-saving and environment-friendly, equipment and process are simple, yield and selectivity are high, the method is suitable for large-scale production in industry, has great economic benefits, solvent evaporation and recovery are not needed, is beneficial to production amplification in industry, equipment maintenance cost is low, system cost is relatively low, environmental pollution is small, operation is simple, is easy to repeat, and epichlorohydrin can be efficiently produced.

The application discloses a preparation method of cis-1-chloro-2,3,3-trifluoropropene and belongs to the technical field of organic synthesis. The method is characterized in that: firstly, a mixed slurry is prepared by using a soluble aluminum salt, a soluble chromium salt, a soluble zinc salt, a surfactant and water as raw materials; the mixed slurry is dried, calcined and fluorinated to obtain a Cr / Al / Zn fluorination catalyst; and then, under the action of the Cr / Al / Zn fluorination catalyst, gas-phase fluorination reaction is carried out by using 1,1,2,3,3-pentachloropropane and hydrogen fluoride gas as reaction raw materials to obtain cis-1-chloro-2,3,3-trifluoropropene. The method is simple and efficient, the reaction is carried out under the action of a specific catalyst, the selectivity of the product is high, the conversion rate of the raw material is high, the method is green and environment-friendly, and less "three wastes" are generated.

In a process for the production of 1,1,1,2,3-pentachloropropane, optionally in the presence of carbon tetrachloride, by introducing 1,1,1,3-tetrachloropropane, chlorine and a Lewis acid catalyst, the improvement comprising: introducing the Lewis acid as a slurry in a chlorinated hydrocarbon.

A method for detecting 3-Monochloropropane-1,2-diol (3-MCPD) esters and Glycidyl esters (GE) in a sample containing refined, bleached, and deodorized palm oil (RBDPO) comprising: adding a predetermined amount of a first reagent containing Dibutyltin dilaurate to the sample and forming a mixture; heating the mixture containing the first reagent to a temperature between 55°C and 65°C for a predetermined period to initiate a reaction between the first reagent and the 3-MCPD esters and GE, forming reaction products containing target analytes; adding a second reagent comprising an ethanol-based solvent to selectively dissolve the reaction products and separating them from the RBDPO; wherein a separate ethanol layer is formed, the layer containing the target analytes; adding a third reagent comprising a dye solution to bind with the separated target analytes; wherein adding the third reagent to the separated target analytes, enables detection of the 3-MCPD esters and GE in the sample. A portable test kit is also provided herein.

This invention discloses a method for preparing 2,3,3,3-tetrafluoropropylene. Using ethylene and carbon tetrachloride as raw materials, 1,1,1,3-tetrachloropropane (HCC-250fb) is first prepared. Then, 1,1,1,3-tetrachloropropane is decomposed to obtain 1,1,3-trichloropropene (HCC-1240za). This 1,1,3-trichloropropene is then reacted with chlorine to generate 1,1,1,2,3-pentachloropropane (HCC-240db). The 1,1,1,2,3-pentachloropropane is then decomposed to obtain 1,1,2,3-tetrachloropropene (HCC-1230xa). The 1,1,2,3-tetrachloropropene is reacted with hydrofluoric acid to generate 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf). Finally, 2,3,3,3-tetrafluoropropylene is prepared using two different methods. This invention has low raw material costs and high yield.

This invention discloses a method for synthesizing 1,1,1,3-tetrachloropropane, belonging to the field of fine chemical intermediate synthesis technology. The method uses chloroform, chlorine, and ethylene as raw materials. Chloroform is mixed with a specific solid chloride catalyst as a mother liquor and added to a reactor. Chlorine and ethylene are continuously introduced from the bottom of the reactor. An addition reaction occurs under reaction conditions of 80-120℃ and 0.5-1.5 MPa, wherein the molar ratio of chloroform, chlorine, and ethylene is controlled at 1.6:0.8:1. The crude product generated is separated by distillation in a recovery tower, and unreacted chloroform and ethylene are returned to the reactor for recycling. No wastewater is generated throughout the reaction process. This invention features a simple process, high reaction selectivity, high catalyst activity and reusability, significantly improved raw material utilization, low equipment material requirements, low investment, and easy implementation for continuous industrial production. It overcomes the technical shortcomings of existing technologies, such as numerous by-products, complex control, large catalyst consumption, and difficult wastewater treatment.

The application relates to the technical field of cellulose derivative preparation, and discloses crosslinked sodium carboxymethyl cellulose and a preparation method thereof. The crosslinked sodium carboxymethyl cellulose is prepared from sodium carboxymethyl cellulose as raw material by adopting a disulfide crosslinking agent-epoxy chloropropane composite crosslinking system, and through raw material pretreatment, phosphoric acid catalytic activation, microwave-ultrasonic synergistic crosslinking, pH adjustment and anhydrous ethanol post-treatment. The composite crosslinking system forms a double crosslinking network, the microwave-ultrasonic synergistic strengthening reaction is uniform, and an additional impurity removal step is not needed. The application simplifies the process, reduces the cost, and the product has high light transmittance, large viscosity, excellent swelling degree and good substitution uniformity, and can be used for high polymer materials.

The application relates to a preparation method of high-performance high-flexibility formaldehyde-free impregnated film paper and application thereof, and belongs to the technical field of impregnated film paper. The application aims to solve the problems that the existing impregnated film paper cannot simultaneously have high strength, high toughness, crack resistance, scratch resistance, wear resistance and formaldehyde-free release, and the low adhesive transparency influences the paper texture. Preparation: 1, adjusting the pH of polyamide epoxy chloropropane resin; 2, preparing polyvinyl alcohol / melamine adhesive; 3, impregnating the decorative base paper in the polyamide epoxy chloropropane resin after the pH is adjusted, then drying to obtain primary impregnated paper, and then impregnating the primary impregnated paper in the polyvinyl alcohol / melamine adhesive at room temperature, and then drying to obtain high-performance high-flexibility formaldehyde-free impregnated film paper. Application: the high-performance high-flexibility formaldehyde-free impregnated film paper is used as a veneer material of artificial board.

The application discloses a recovery method of propylene in a dichloropropane tail gas byproduct of an epoxypropane device and a dichloropropane refining method. The recovery method comprises the following steps: obtaining crude dichloropropane by preparing epoxypropane through a chlorohydrination method; separating the crude dichloropropane through a light component removal process and a rectification process to obtain dichloropropane products and propylene; and returning the propylene to a chlorohydrination reactor for preparing epoxypropane. The propylene recovery can reduce propylene raw material consumption of the epoxypropane device, reduce the amount of dichloropropane tail gas incineration treatment and CO2 emission.