Device and process for producing propylene glycol monomethyl ether acetate by reactive distillation coupled pervaporation

A technology of pervaporation and reactive distillation, which is applied in the field of producing propylene glycol monomethyl ether acetate, can solve the problems of low production efficiency, high energy consumption, and heavy equipment load, and achieve good effect, high conversion rate and simple method

Active Publication Date: 2021-01-08
CHINA CONSTR IND & ENERGY ENG GRP CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of reaction balance in this process, the single-pass conversion rate of acetic acid is about 50% (PM is slightly excessive), a large amount of unreacted raw materials need to be separated and recycled, the equipment load is large, the energy consumption is high, and the production efficiency is low.

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
  • Device and process for producing propylene glycol monomethyl ether acetate by reactive distillation coupled pervaporation
  • Device and process for producing propylene glycol monomethyl ether acetate by reactive distillation coupled pervaporation
  • Device and process for producing propylene glycol monomethyl ether acetate by reactive distillation coupled pervaporation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] refer to Figure 1-2 A device for producing propylene glycol monomethyl ether acetate by reactive distillation coupled with pervaporation, said device comprising: a prereactor 1, a catalytic reactive distillation column 2, a pervaporation feed buffer tank 3, a pervaporation membrane module 4 and Product refining tower 5.

[0045] Prereactor 1 is provided with prereactor feed port and prereactor discharge port; the top of catalytic reaction rectification tower 2 is provided with rectification tower top discharge port and reflux material feed port, and the middle part is provided with rectification The tower feed port, the bottom of the tower is provided with the rectification tower bottom discharge port; the pervaporation feed buffer tank 3 is provided with the buffer tank feed port, toluene feed port and buffer tank discharge port; the pervaporation membrane module 4 is provided with There are gas-liquid mixing inlet, steam condensate outlet and organic steam outlet; t...

Embodiment 2

[0056] refer to figure 1 , 3 -4. A device for producing propylene glycol monomethyl ether acetate by reactive distillation coupled with pervaporation, said device comprising: a prereactor 1, a catalytic reactive distillation column 2, a pervaporation feed buffer tank 3, and a pervaporation membrane module 4 and product refining tower 5.

[0057] Prereactor 1 is provided with prereactor feed port and prereactor discharge port; the top of catalytic reaction rectification tower 2 is provided with rectification tower top discharge port and reflux material feed port, and the middle part is provided with rectification The tower feed port, the bottom of the tower is provided with the rectification tower bottom discharge port; the pervaporation feed buffer tank 3 is provided with the buffer tank feed port, toluene feed port and buffer tank discharge port; the pervaporation membrane module 4 is provided with There are gas-liquid mixing inlet, steam condensate outlet and organic steam...

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

No PUM Login to view more

Abstract

The invention discloses a device for producing propylene glycol monomethyl ether acetate by coupling reactive distillation with pervaporation. The device comprises a pre-reactor, a catalytic reactivedistillation tower, a pervaporation feeding buffer tank, a pervaporation membrane assembly and a product refining tower. The invention also discloses a process for producing propylene glycol monomethyl ether acetate by reactive distillation coupled pervaporation. The method disclosed by the invention is simple, good in effect, strong in operability and remarkable in energy-saving effect, and the propylene glycol monomethyl ether acetate can be applied to large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of producing propylene glycol monomethyl ether acetate, in particular to a device and a process for producing propylene glycol monomethyl ether acetate by reactive distillation coupled with pervaporation. Background technique [0002] Propylene glycol monomethyl ether acetate (PMA) is a low-toxic high-grade industrial solvent with excellent performance. It has strong solubility for polar and non-polar substances. It is suitable for solvents for various polymers in high-grade coatings and inks, including Urethane, Vinyl, Polyester, Cellulose Acetate, Alkyd, Acrylic, Epoxy, Nitrocellulose etc. in. Propylene glycol methyl ether propionate is the best solvent in coatings and inks, suitable for unsaturated polyesters, polyurethane resins, acrylic resins, epoxy resins, etc. [0003] At present, the only industrialized PMA synthesis process is obtained by direct esterification of propylene glycol methyl ether (PM...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/54C07C67/52C07C67/48C07C69/16B01J8/02B01D3/00
CPCB01D3/009B01J8/0292C07C67/08C07C67/48C07C67/52C07C67/54C07C69/16Y02P20/10
Inventor 孙玉玉黄益平岳昌海黄晶晶秦凤祥夏苗王元锋
Owner CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap