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Method for recycling epoxy chloropropane based on epoxy chloropropane light component

A technology of epichlorohydrin and light components, which is applied in the field of chemical industry, can solve the problems of difficult handling of epichlorohydrin light components, achieve the goals of reducing environmental pollution and harm to human body, improving utilization rate and reducing production cost Effect

Active Publication Date: 2018-11-06
山东民基新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for reclaiming epichlorohydrin based on epichlorohydrin light components, which solves the problem that epichlorohydrin light components are difficult to handle, epichlorohydrin can be recycled, and the epoxy chlorohydrin is improved. Utilization of chloropropane

Method used

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  • Method for recycling epoxy chloropropane based on epoxy chloropropane light component

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 100 g of the epichlorohydrin light component and put it into a 250 mL three-necked flask, add 4 g of triethanolamine, and react at room temperature for 15 min under magnetic stirring; then distill at a top temperature of 62°C for 20 min under normal pressure, and collect dichloroethylene and chloroform. The liquid is discharged, and its mass is weighed to be 39.1g; when no distillate is evaporated, it is changed to vacuum distillation, and the vacuum degree is -0.085MPa, and the temperature is 62°C. Distillate under reduced pressure, collect epichlorohydrin distillate, When no epichlorohydrin distillate evaporates, stop the distillation, and then distill under reduced pressure for 15 minutes to obtain 45.5 g of epichlorohydrin; the raffinate is cooled to 30 °C and distilled together with dichloroethylene and chloroform distillate Sent to the incinerator for incineration. The yield of epichlorohydrin is 95.20%, and the purity is 97.5%.

Embodiment 2

[0023] Take 100 g of the epichlorohydrin light component and put it into a 250 mL three-necked flask, add 4 g of triethylamine, and react at room temperature for 12 min under magnetic stirring; then distill under atmospheric pressure at a top temperature of 64 ° C for 25 min to collect dichloroethylene and chloroform Distillate, weighing its mass is 38.2g; when no distillate evaporates, change to vacuum distillation, vacuum distillation at -0.085MPa, temperature 64°C, collect epichlorohydrin distillate , when no epichlorohydrin distillate evaporates, stop the distillation, and then distill under reduced pressure for 12min to obtain 46.0g epichlorohydrin; Sent together to the incinerator for incineration. The yield of epichlorohydrin is 95.55%, and the purity is 96.8%.

Embodiment 3

[0025] Take 100 g of the epichlorohydrin light component and put it into a 250 mL three-necked flask, add 2 g of triethanolamine, and react at room temperature for 15 min under magnetic stirring; then distill under atmospheric pressure at a top temperature of 65 ° C for 15 min, and collect dichloroethylene and chloroform. The liquid is discharged, and its mass is weighed to be 37.9g; when no distillate is evaporated, it is changed to vacuum distillation, and the vacuum degree is -0.083MPa, and the temperature is 65°C. Distillate under reduced pressure, collect epichlorohydrin distillate, When no epichlorohydrin distillate evaporates, stop the distillation, and then distill under reduced pressure for 20 minutes to obtain 44.2 g of epichlorohydrin; the raffinate is cooled to 30 °C and distilled together with dichloroethylene and chloroform distillate Sent to the incinerator for incineration. The yield of epichlorohydrin is 92.29%, and the purity is 97.3%.

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Abstract

The invention belongs to the technical field of chemical engineering, and specifically relates to a method for recycling epoxy chloropropane based on an epoxy chloropropane light component. The methodcomprises the following steps: adding a pretreating agent into the epoxy chloropropane light component, carrying out a reaction, and then carrying out atmospheric distillation and reduced pressure distillation to obtain epoxy chloropropane, wherein the pretreating agent is triethanolamine or triethylamine. According to the method, the triethanolamine or triethylamine is added into the epoxy chloropropane light component to serve as the pretreating agent, dimerization or copolymerization occurs on acraldehyde to generate an acraldehyde polyer with high boiling point, and other components in the epoxy chloropropane light component can exist independently while irritating odor is removed. According to the method, the epoxy chloropropane is recycled from the epoxy chloropropane light component, so that the utilization rate of the raw materials is improved, the environmental pollution and damages on human bodies are reduced, and meanwhile, the production cost of the product is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for recovering epichlorohydrin based on epichlorohydrin light components. Background technique [0002] The production process of epichlorohydrin mainly includes propylene chlorination method, propylene acetate method and glycerin chlorination method. In today's market, the price of propylene is gradually rising and the production of biodiesel by-product glycerin is increasing year by year. In addition, the propylene chlorination method and the propylene acetate method are prone to produce a large amount of waste water and waste residues, and the pollution control is difficult, making the propylene chlorination method The propylene acetate method is gradually eliminated, and the glycerin chlorination method will become the main production process of epichlorohydrin. [0003] However, during the production of epichlorohydrin by glycerol chlorination...

Claims

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Application Information

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IPC IPC(8): C07D303/08C07D301/32C07D301/36
CPCC07D301/32C07D301/36C07D303/08
Inventor 韦兵李建军陈衍坤陈剑波张海朋高丽霞杨中原祝新涛
Owner 山东民基新材料科技有限公司
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