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Method for producing epoxy compound by microwave promoted chlorohydrin saponification

A technology of epoxy compounds and chlorohydrins, which is applied in the chemical industry, organic chemistry, sustainable manufacturing/processing, etc., can solve problems such as high energy consumption, affect the market competitiveness of enterprises, and high product costs, achieve low energy consumption, overcome material The effect of inconvenient control of transportation and proportioning and reduction of dosage

Active Publication Date: 2017-03-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of the multi-effect evaporation method is that the energy consumption is high, resulting in high product cost, which affects the overall market competitiveness of the enterprise.

Method used

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  • Method for producing epoxy compound by microwave promoted chlorohydrin saponification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Microwave-promoted Saponification of Monochloropropanol to Propylene Oxide with Caustic Soda

[0023] In the premix kettle (1), 100Kg / h monochloropropanol (from glycerin dehydration gained propylene glycol and hydrogen chloride chlorination, weight composition: monochloropropanol 70%, hydrogen chloride 15%, water 15%.), and pass The 57Kg / h powder caustic soda (particle size is 150 mesh) input by the screw pump (2) is mixed, and the mixing temperature of the controlled materials is 35° C., and the residence time is 20 seconds.

[0024] The microwave irradiation reaction feed pump (3) is then used to transport to the microwave irradiation reactor (4). The microwave radiation frequency of the microwave radiation reactor is 915MHz, and the radiation power is 8W / L material. The residence time of the control material in the microwave irradiation reactor is 20 seconds, and the reaction temperature is 40°C.

[0025] The reaction liquid after saponification enters the azeotrop...

Embodiment 2

[0028] Production of epichlorohydrin from dichloropropanol by microwave-promoted saponification of quicklime

[0029] In the premix kettle (1), 100kg / h dichloropropanol (from glycerol and hydrogen chloride chlorination, weight composition: dichloropropanol 85%, hydrogen chloride 5%, water 10%), and by screw pump (2 ) input 38.5kg / h quicklime (calcium oxide weight content 81%, particle size is 400 mesh) mixing. Control the material mixing temperature to 40°C and the residence time to 40 seconds.

[0030] The microwave irradiation reaction feed pump (3) is then used to transport to the microwave irradiation reactor (4). The microwave radiation frequency of the microwave radiation reactor is 915MHz, and the radiation power is 6W / L material. The residence time of the control material in the microwave irradiation reactor is 60 seconds, and the reaction temperature is 60°C.

[0031] The reaction liquid after saponification enters the azeotropic rectification column (5). The oper...

Embodiment 3

[0034] Production of epichlorohydrin from dichloropropanol by microwave-promoted saponification of slaked lime

[0035] In the premixing kettle (1), 100kg / h dichloropropanol (from glycerin and hydrogen chloride chlorination, weight composition: dichloropropanol 98%, hydrogen chloride 1%, water 1%) and pass the screw pump (2) The input 42kg / h slaked lime (calcium hydroxide content 90%, particle size is 600 meshes) is mixed. The residence time of the materials in the mixing tank is 60 seconds, and the mixing temperature is 50°C.

[0036] The microwave irradiation reaction feed pump (3) is then used to transport to the microwave irradiation reactor (4). The microwave radiation frequency of the microwave radiation reactor is 2450MHz, and the radiation power is 4W / L material. The residence time of the control material in the microwave irradiation reactor is 40 seconds, and the reaction temperature is 80°C.

[0037]The reaction liquid after saponification enters the azeotropic re...

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Abstract

The invention belongs to a method for synthesizing an epoxy compound through a saponification process, and specifically relates to a clean saponification method for generating corresponding epoxy compounds with powdery alkali (quick / slaked lime or caustic soda) and chlorohydrin (monochloropropanol or dichloropropanol) through a dehydrochlorination reaction under the action of microwave. According to the invention, the powdery alkali (quick / slaked lime or caustic soda) and the chlorohydrin (monochloropropanol or dichloropropanol) are used for the dehydrochlorination reaction, so the usage amount of process water in the process of chlorohydrin saponification is reduced; meanwhile, the concentration of a generated saponified solution is greatly improved; thus, the recovery of salt and the recycling of water in the saponified solution can be realized under low energy consumption. The method provided by the invention does not discharge salt containing saponified wastewater in the process of production, and achieves the purposes of energy conservation and emission reduction.

Description

technical field [0001] The present invention belongs to the method for the saponification synthesis epoxy compound, specifically relate to with powdery alkali (lime / slaked lime or caustic soda) and chlorohydrin (monochloropropanol or dichloropropanol), carry out dehydrochlorination under microwave action reaction to generate a clean saponification method for the corresponding epoxy compound. Background technique [0002] The saponification reaction of chlorohydrins and lime water is the mainstream production method for the production of bulk chemicals such as propylene oxide and epichlorohydrin. On the one hand, it is because the saponification process often has the lowest cost, which makes the product have a competitive advantage; on the other hand, in order to balance chlorine gas resources, chlor-alkali enterprises have to use a large number of saponification processes to organize production to consume chlorine gas. [0003] The saponification method has the advantages o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D303/08C07D301/26
CPCC07D301/26C07D303/04C07D303/08Y02P20/50
Inventor 单玉华冯洋洋储海霞毛翠霞王超鲁墨弘李明时
Owner CHANGZHOU UNIV
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