Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Extraction method of epichlorohydrin-containing water phase

An epichlorohydrin and extraction technology, which is applied in the field of extraction of an aqueous phase containing epichlorohydrin, can solve problems such as entrainment, and achieve the effects of high methanol quality and high extraction efficiency

Pending Publication Date: 2021-08-13
JIANGSU YANGNONG CHEM GROUP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problems existing in the prior art, the present invention provides a method for extracting an aqueous phase containing epichlorohydrin, which solves the problem of the separation of epichlorohydrin in an aqueous phase containing epichlorohydrin by using membrane extraction. The problem of entrainment of the extractant in the aqueous phase containing epichlorohydrin in the existing rectification or other extraction methods reduces the possibility of impurities between the extractant and other substances in the extracted aqueous phase

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Extraction method of epichlorohydrin-containing water phase
  • Extraction method of epichlorohydrin-containing water phase
  • Extraction method of epichlorohydrin-containing water phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a method for extracting an aqueous phase containing epichlorohydrin, which is carried out using the above-mentioned device, and specifically includes the following steps:

[0052] Use a flow pump to send 3-chloropropene as an extraction agent into the inner side of the membrane in the hollow fiber membrane extractor, and stop the pump after filling the membrane tube. The membrane is a polytetrafluoroethylene membrane with an average pore size of 60 nm. After 30 minutes of infiltration, Then the water phase containing epichlorohydrin is sent to the shell side of the hollow fiber membrane extractor by flow pump, that is, the outer side of the membrane. The timing starts when the contact occurs and the extraction occurs, and the membrane extraction is carried out for 10 minutes. The raffinate water phase and the extracted oil phase are extracted from the shell side outlet and the tube side outlet of the membrane extractor respectively.

[0053] The...

Embodiment 2

[0055] This embodiment provides a method for extracting an aqueous phase containing epichlorohydrin, which is carried out using the above-mentioned device, and specifically includes the following steps:

[0056] Use a flow pump to send 3-chloropropene as an extraction agent into the inner side of the membrane tube in the hollow fiber membrane extractor, and stop the pump after filling the membrane tube. The membrane is a polytetrafluoroethylene membrane with an average pore size of 50 nm. After 60 min of infiltration, Then the water phase containing epichlorohydrin is sent to the shell side of the hollow fiber membrane extractor by flow pump, that is, the outer side of the membrane. The timing starts when the contact occurs and the extraction occurs, and the membrane extraction is carried out for 8 minutes. The raffinate water phase and the extracted oil phase are extracted from the shell side outlet and the tube side outlet of the membrane extractor respectively.

[0057] The...

Embodiment 3

[0059] This embodiment provides a method for extracting an aqueous phase containing epichlorohydrin, which is carried out using the above-mentioned device, and specifically includes the following steps:

[0060] Use a flow pump to send 3-chloropropene as an extraction agent into the inner side of the membrane tube of the hollow fiber membrane extractor, and stop the pump after filling the membrane tube. The membrane is a polytetrafluoroethylene membrane with an average pore diameter of 70 nm. After 20 minutes of infiltration, Then the water phase containing epichlorohydrin is sent to the shell side of the hollow fiber membrane extractor by flow pump, that is, the outer side of the membrane. The timing starts when the contact occurs and the extraction occurs, and the membrane extraction is carried out for 12 minutes. The raffinate water phase and the extracted oil phase are extracted from the shell side outlet and the tube side outlet of the membrane extractor respectively.

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Average pore sizeaaaaaaaaaa
Apertureaaaaaaaaaa
Login to View More

Abstract

The invention provides an extraction method of an epichlorohydrin-containing water phase. The extraction method comprises the step of separating epichlorohydrin in the epichlorohydrin-containing water phase by adopting membrane extraction. The extraction method can ensure that the raffinate does not contain 3-chloropropene or contains a very small amount of 3-chloropropene, so that no ether impurities are generated when the epoxy chloropropane water phase is directly rectified to recover methanol, the quality of recovered methanol is improved, and the economic benefit of the epoxy chloropropane production process is improved.

Description

technical field [0001] The invention relates to the technical field of organic chemical industry, in particular to an extraction method of an aqueous phase containing epichlorohydrin. Background technique [0002] Epichlorohydrin is an important basic chemical raw material, which is mainly used in the production of epoxy resin, chlorohydrin rubber, glycerin, surfactant and other products. [0003] At present, the most researched is the synthesis of epichlorohydrin using titanium silicon molecular sieve as a catalyst. This process uses methanol as a solvent, and dissolves 3-chloropropene in methanol solution to react with hydrogen peroxide, thereby ensuring a higher conversion rate of hydrogen peroxide and Epichlorohydrin selectivity. After the catalyst is separated, the reaction material contains 3-chloropropene, methanol, epichlorohydrin, water and impurities. In the subsequent post-treatment of the reaction material, a single extraction method is generally used to transfe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07D301/32C07D303/08
CPCC07D301/32C07D303/08
Inventor 徐林丁克鸿孙诚吕丽李幸霏李明
Owner JIANGSU YANGNONG CHEM GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com