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A kind of method that chlorohydrin saponification produces epoxy compound

A technology of epoxy compounds and chlorohydrins, which is applied in organic chemistry and other fields, can solve problems such as high energy consumption, high product cost, and affecting the market competitiveness of enterprises, and achieve the effects of low energy consumption, reduced consumption, and avoiding heat accumulation

Active Publication Date: 2019-03-22
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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  • A kind of method that chlorohydrin saponification produces epoxy compound
  • A kind of method that chlorohydrin saponification produces epoxy compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Saponification of monochloropropanol with caustic soda to produce propylene oxide

[0022] Monochloropropanol (from glycerol dehydration gained propylene glycol and hydrogenchloride chlorination, weight composition: monochloropropanol 70%, hydrogen chloride 15%, water 15%.) Enter stirring tank with 100Kg / h and 52.9Kg / h powder caustic soda ( particle size is 150 mesh) mixing. The residence time of the materials in the mixing tank is 10 seconds, and the mixing temperature is 15°C.

[0023] The mixed material is sent to the tube preheater. Control the residence time of the material in the preheater to 5 seconds, and the temperature of the material out of the preheater to 40°C.

[0024] The preheated material enters the ultrasonic radiation reactor for saponification reaction. The radiation frequency is 80KHz, and the radiation power is 4W / L material. The residence time of the control material in the ultrasonic radiation reactor is 30 seconds, and the reaction temperatu...

Embodiment 2

[0029] Production of epichlorohydrin by saponification of dichloropropanol with quicklime

[0030] Dichloropropanol (from glycerol and hydrogen chloride chlorination, weight composition: dichloropropanol 85%, hydrogen chloride 5%, water 10%) enters stirring tank with 200kg / h, and 69kg / h unslaked lime (calcium oxide weight content 81%) , particle size is 400 mesh) mixing. The residence time of the materials in the mixing tank is 30 seconds, and the mixing temperature is 30°C.

[0031] The mixed material enters the tube preheater. The residence time of the control material in the preheater is 15 seconds, and the temperature of the material out of the preheater is 55°C.

[0032] The preheated material enters the ultrasonic radiation reactor. The radiation frequency is 40KHz, and the radiation power is 7W / L material. The residence time of the materials in the ultrasonic radiation reactor is controlled to be 60 seconds, and the reaction temperature is controlled at 65°C.

[00...

Embodiment 3

[0037] Production of Epichlorohydrin by Saponification of Dichloropropanol with Slaked Lime

[0038] Dichloropropanol (from glycerin and hydrogen chloride chlorination, weight composition: dichloropropanol 98%, hydrogen chloride 1%, water 1%) enters stirring tank with 180kg / h, and 75kg / h slaked lime (calcium hydroxide content 90%) , particle size is 600 mesh) mixing. The residence time of the materials in the mixing tank is 40 seconds, and the mixing temperature is 40°C.

[0039] The mixed material enters the tube preheater. The residence time of the control material in the preheater is 20 seconds, and the temperature of the material out of the preheater is 75°C.

[0040]The preheated material enters the ultrasonic radiation reactor. The radiation frequency is 28KHz, and the radiation power is 10W / L material. The residence time of the materials in the ultrasonic radiation reactor is controlled to be 80 seconds, and the reaction temperature is controlled at 80°C.

[0041] ...

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Abstract

The invention belongs to a method for synthesizing an epoxy compound by adopting a saponification method and specifically relates to a clean saponification method for generating the corresponding epoxy compound by performing dehydrochlorination reaction on powder alkali (quick lime / slaked lime or caustic soda) and chlorohydrin (mono-chloropropanol or dichloropropanol) under an ultrasonic effect. According to the invention, the powder alkali (quick lime / slaked lime or caustic soda) and chlorohydrin (mono-chloropropanol or dichloropropanol) have a dehydrochlorination reaction, so that the dosage of process water in the chlorohydrin saponification process is greatly reduced, the concentration of the generated saponification solution is greatly increased, the recycling of byproduct salt and the recycling of water can be realized under the condition of lower energy consumption, and thus the purposes of saving energy and reducing emission can be achieved.

Description

technical field [0001] The present invention belongs to the method for synthesizing epoxy compound by saponification method, specifically relate to with powdery alkali (slaked lime or caustic soda) and chlorohydrin (monochloropropanol or dichloropropanol), carry out dehydrochlorination under ultrasonic 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 advanta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/08C07D303/04C07D301/26
CPCC07D301/26C07D303/04C07D303/08
Inventor 单玉华储海霞毛翠霞王超郑一天冯洋洋
Owner CHANGZHOU UNIV
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