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Micro reaction system and method for chlorohydrination of chloropropene

A technology of chloropropene chlorohydrin and chloropropene, which is applied in the field of organic compound synthesis, can solve the problems of decreased reaction yield, increased side reactions of trichloropropane, and high energy consumption in the process, so as to improve selectivity and yield, reduce process Effects of energy consumption and shortened response time

Active Publication Date: 2012-07-25
JIANGSU ANPON ELECTROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solubility of allyl chloride in water is very low. In order to increase the concentration of dichloropropanol, the industrial use of circulating dichloropropanol solution to dissolve chlorine and allyl chloride, the process consumes a lot of energy
Simultaneously, because allyl chloride and dichloropropanol solution are relatively large, the mixing effect is not good, and process control is unsatisfactory to easily form gaseous phase chlorine and organic phase, cause the side reaction of generating trichloropropane to increase greatly, and the reaction yield declines

Method used

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  • Micro reaction system and method for chlorohydrination of chloropropene
  • Micro reaction system and method for chlorohydrination of chloropropene

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A method for the chlorohydrination of allyl chloride, the method is carried out according to the following steps:

[0026] a) In the first micro-reactor unit, inject chlorine and water into the first micro-mixing device (chlorine gas mixer) respectively by chlorine cylinder and water liquid addition tank, the flow of the two is respectively 20ml / min and 5ml / min min, to prepare chlorine water, the temperature of dissolving chlorine gas is 20°C, and the pressure is 4 atmospheres. Chlorine water and allyl chloride injected into the allyl chloride filling tank are quickly mixed and reacted in the second micro-mixing device, and the flow rate of allyl chloride is 76 μl / min, and complete the reaction in the subsequent pipeline, the temperature of the pipeline is 20°C.

[0027] b) After the reaction material flows out from the first microreactor unit, it is matured in the pipeline for 10-100 seconds to obtain the reaction product dichloropropanol solution.

[0028] The micro...

Embodiment 2

[0031] A method for the chlorohydrination of allyl chloride, the method is carried out according to the following steps:

[0032] a) In the first microreactor unit, inject chlorine gas and water into the first micro-mixing device (chlorine gas mixer) respectively by the chlorine gas bottle and the water liquid addition tank, and the flow rates of the two are respectively 10ml / min and 5ml / min. min, to prepare chlorine water, the temperature of dissolving chlorine gas is 10°C, and the pressure is 1 atmosphere. Chlorine water and allyl chloride injected into the allyl chloride filling tank are quickly mixed and reacted in the second micro-mixing device, and the flow rate of allyl chloride is 36 μl / min, and complete the reaction in the subsequent pipeline, the temperature of the pipeline is 40°C.

[0033] B) the solution obtained is passed into the second microreactor unit, reacts with the added chlorine and allyl chloride, the flow rate of the two, the dissolution temperature an...

Embodiment 3

[0038] A method for the chlorohydrination of allyl chloride, the method is carried out according to the following steps:

[0039] a) In the first microreactor unit, inject chlorine gas and water into the first micro-mixing device (chlorine gas mixer) respectively by the chlorine cylinder and the water liquid addition tank, and the flow rates of the two are respectively 15ml / min and 5ml / min. min, to prepare chlorine water, the temperature of dissolving chlorine gas is 10°C, and the pressure is 3 atmospheres. Chlorine water and allyl chloride injected into the allyl chloride filling tank are quickly mixed and reacted in the second micro-mixing device, and the flow rate of allyl chloride is 54 μl / min, and complete the reaction in the subsequent pipeline, the temperature of the pipeline is 50°C.

[0040] b) The solution obtained is passed into the second and third microreactor units to react with the added chlorine and allyl chloride, the flow of allyl chloride is 53.5 μl / min, th...

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Abstract

The invention discloses a micro reaction system and a method for chlorohydrination of chloropropene, belonging to the technical field of synthesis of organic compounds. The micro reaction system comprises one or more microreactor units connected in series, wherein water is injected from the first microreactor unit in one time, and then flows through 0-3 subsequent microreactor units in sequence. Chlorine and chloropropene are injected into each microreactor unit according to a certain distribution ratio. Inside each microreactor unit, chlorine injected firstly is dissolved in a liquid phase, contacts with chloropropene injected later to carry out a chlorohydrination reaction, and the reaction solution outflows from the last microreactor unit, and is aged through a pipeline to obtain the product. The system provided by the invention adopts a multistage series system, can prepare high-concentration dichloropropanol solution, and avoids a cyclic process and reduces the process energy consumption at the same time. Meanwhile, due to the enhanced mixing effect of the microreactor, the method disclosed by the invention can improve the selectivity and the yield of the chlorohydrination process of chloropropene.

Description

technical field [0001] The invention belongs to the technical field of organic compound synthesis, and in particular relates to a micro-reaction system and method for chlorohydrination of allyl chloride. Background technique [0002] Epichlorohydrin is an important organic chemical product with a wide range of uses, mainly used in the production of epoxy resin, chlorohydrin rubber, etc. At present, the main methods of producing epichlorohydrin at home and abroad are propylene high-temperature chlorination method and propylene acetate method. With the development of the biodiesel industry, the glycerol method has also received more and more attention. The high-temperature chlorination of propylene uses propylene as a raw material, which is still the most important production process at present, and more than 90% of epichlorohydrin is produced by the high-temperature chlorination of propylene. [0003] Propylene high-temperature chlorination process includes propylene chlori...

Claims

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Application Information

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IPC IPC(8): C07C31/36C07C29/66
Inventor 骆广生张吉松吕阳成王凯姜育田
Owner JIANGSU ANPON ELECTROCHEM
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