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Method for co-producing epoxypropane and epoxy chloropropane

A technology of epichlorohydrin and propylene oxide, applied in the production of bulk chemicals, organic chemistry, etc., can solve the problems of low-value calcium chloride, insufficient utilization of hydrochloric acid, etc., to improve the utilization rate, improve the utilization value, reduce the The effect of the degree of pollution

Active Publication Date: 2013-04-17
山东昌邑海能化学有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process also reduces wastewater discharge, hydrochloric acid is also used to prepare calcium chloride with low value, and the value of hydrochloric acid is not fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for co-production of propylene oxide and epichlorohydrin, comprising the following processing steps:

[0028] 1) Chloroalcoholization reaction: react chlorine gas, propylene and water, the content of chloropropanol produced is about 4%, and the content of hydrochloric acid is about 1.6%;

[0029] 2) Preparation of propylene oxide: After extracting the chloropropanol obtained in step 1) with the extractant, rectify the extractant containing chloropropanol to separate the chloropropanol, and pass the chloropropanol into the saponification tower for further Saponification to produce propylene oxide, the extractant separated by rectification returns to the system to continue extracting chloropropanol;

[0030] 3) Extraction of hydrochloric acid: Extract the solution after extracting chloropropanol in step 2) with a complex extractant to extract hydrochloric acid, wherein the complex extractant is composed of N235, n-hexadecane and tributyl phosphate Mixed in a vol...

Embodiment 2

[0034] The difference with embodiment 1 is:

[0035] 1) The blending agent in the complexing extractant is n-octanol instead of tributyl phosphate in Example 1; the volume ratio of complexing agent, solvent and blending agent is 65:25:10;

[0036] 2) In step 4), the volume ratio of the glycerol passed into the tubular reactor to the complex extractant containing hydrochloric acid is 1:7;

[0037] 3) In step 4), the amount of adipic acid accounts for 1% of the volume amount of glycerol.

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Abstract

The invention discloses a method for co-producing epoxypropane and epoxy chloropropane, belonging to the technical field of fine chemistry. The method comprises the steps of: firstly, extracting chloropropanol produced by adopting a chlorohydrination method by using an extracting agent, rectifying and extracting the chloropropanol and then entering into a saponification procedure to produce epoxypropane; extracting hydrochloric acid in a chlorohydrination method production process by using a complexing extracting agent; and finally, reacting the extracted hydrochloric acid with glycerol and a carboxylic acid catalyst to produce epoxy chloropropane, wherein the used complexing extracting agent is formed by mixing N235, n-tridecane and trioctyl phosphate in a volume ratio of 50:45:5. According to the method, the co-production of epoxypropane and epoxy chloropropane is realized through a specific process, thus the utilization rate of hydrochloric acid is increased, the utilization value of hydrochloric acid is increased, the environment pollution is reduced, and the raw material waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a co-production method of propylene oxide and epichlorohydrin. Background technique [0002] Propylene oxide, also known as propylene oxide and methyl oxirane, is a very important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. At present, the relatively mature production methods at home and abroad are only chloroalcoholation and hydroperoxidation. Among them, chloroalcoholation is widely used by manufacturers because of its simple process and low operating cost. However, this method will produce a large amount of Not only the utilization rate of raw materials is low, but also the large amount of waste water produced will pollute the environment. [0003] Epichlorohydrin is also an important organic chemical raw material and fine chemical product. Its main purpose is to make epoxy resin, and it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D303/08C07D301/26C07D301/02
CPCY02P20/52
Inventor 蒲伟于强强裴迎迎李连杰刘俊栋王凤王金富
Owner 山东昌邑海能化学有限责任公司
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