Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preventing polymerization in tert-butyl acrylate production process

A technology of tert-butyl acrylate and production process, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of no improvement in the polymerization inhibition method and the like

Inactive Publication Date: 2020-12-11
YUEYANG FUHE TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN104030919A relates to a process for preparing tert-butyl acrylate by a continuous method, and proposes a fixed-bed catalyst and a continuous method production scheme, without improving the polymerization inhibition method
[0004] CN103073426A A preparation process for catalyzing and synthesizing t-butyl acrylate with strong acidic cation exchange resin as a catalyst, and proposes a batch method for producing t-butyl acrylate, without multiple methods involving polymerization inhibition

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Put acrylic acid, catalyst (strongly acidic cation exchange resin with large pore size, one-tenth of the mass of acrylic acid), polymerization inhibitor and isobutylene into the reactor, control the temperature at 30-35°C, and isobutylene at a space velocity of 0.5m 3 / h is slowly added under the liquid surface to undergo esterification reaction, and at the same time, the space velocity of isobutene is one-tenth that is 0.05 m 3 / h, adding a small amount of dry compressed air by bubbling, stirring to synthesize tert-butyl acrylate, unreacted isobutylene and a small amount of air escape from the vent valve and enter the isobutylene recovery system; wherein, the molar ratio of acrylic acid and polymerization inhibitor is 1 : 0.05, there is no material polymerization phenomenon in the reaction system through observation.

[0019] The mixed reaction solution is directly pumped into the first rectification tower from the fixed bed reactor, the first rectification tower is at...

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 method for preventing polymerization in a tert-butyl acrylate production process. The method comprises the following steps: stirring acrylic acid, a catalyst, a polymerization inhibitor and isobutene in a reaction kettle to synthesize tert-butyl acrylate, and refining tert-butyl acrylate. When tert-butyl acrylate is synthesized, a small amount of dry compressed air is added to destroy a polymerization center; meanwhile, when tert-butyl acrylate is refined, reflux is carried out at the bottoms of the rectifying towers and the tops of the refining towers, polymerizationinhibition air is added into the reboilers, the polymerization inhibition effect is obvious, and the dosage of a polymerization inhibitor is obviously reduced.

Description

technical field [0001] The invention relates to the field of organic synthesis, in particular to a method for preventing polymerization in the production process of tert-butyl acrylate. Background technique [0002] Whether it is a continuous method or a batch method, in the production process of tert-butyl acrylate, there is a problem of polymerization of acrylic acid and tert-butyl acrylate. Manufacturers generally control the amount of polymerization inhibitor reasonably, or use more than one composite polymerization inhibitor. Aspects to control polymerization, this method increases production costs and increases the difficulty of product separation. We add polymerization inhibitors to the parts where polymers may be formed, and at the same time reflux in the reactor and the top of the refining tower, and add polymerization-inhibiting air to each reboiler, the polymerization-inhibiting effect is obvious, and the amount of polymerization inhibitors is significantly reduce...

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): C07C69/54C07C67/04C07C67/54
CPCC07C67/04C07C67/54C07C2531/08C07C69/54
Inventor 李国强吴继明李丛绿
Owner YUEYANG FUHE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products