Separation method of m-ethylphenol and paraethyl phenol

A technology of ethyl phenol and tert-butyl phenol, applied in the separation field of m-ethyl phenol and p-ethyl phenol, can solve the problems of low yield, high separation operation requirements, difficult catalyst separation and the like

Active Publication Date: 2018-09-04
陕西巴斯腾科技有限公司
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although there are many separation methods for m-p-alkylphenols at present, and some methods have been industrialized, there are still certain shortcomings
For example: the crystallization separation method has strict requirements on the proportion of raw materials, and the yield is not high; the adsorption separation method needs to use a large amount of solvent, and has high requirements for the separation operation; the complexation separation method also requires a large amount of solvent, and complexation The separation and mechanical application of solvents are complicated and costly; the alkylation separation method is a relatively common method for separating m-p-cresol in China at present, but when liquid acid, acidic ionic liquid and aluminum phenate are used as catalysts, the separation of catalysts is difficult. It must be difficult. When solid acid is used as the catalyst, ethylene isobutyl is easy to polymerize on the catalyst, which will cause accelerated deactivation of the catalyst and affect the service life.

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

[0020] Dissolve 200 kg of a mixture of m-ethylphenol and p-ethylphenol (the mass content of m-ethylphenol is 61%, and the mass content of p-ethylphenol is 39%) in 800 kg of nitrogen methylpyrrolidone bisulfate and sulfamic acid The composite ionic liquid formed, and then the mixed solution was added into a bubble bed reactor with a constant temperature circulating water bath jacket. Turn on the circulating water bath, and control the temperature of the water bath to 50°C, then blow in isobutylene under normal pressure, and control the reaction temperature not to exceed 60°C. The ionic liquid is precipitated from it and floats on the surface of the ionic liquid. The tert-butylphenol product in the upper layer was removed and rectified under reduced pressure to obtain 172 kg of 6-tert-butyl m-ethylphenol product and 112 kg of 2-tert-butyl-p-ethylphenol product.

[0021] Add 172 kg of 6-tert-butyl-m-ethylphenol product obtained by rectification into the cracking kettle, and add ...

Embodiment 2

[0023] Dissolve 100 kg of a mixture of m-ethylphenol and p-ethylphenol (the mass content of m-ethylphenol is 36%, and the mass content of p-ethylphenol is 64%) in 900 kg of nitrogen methylpyrrolidone bisulfate and sulfamic acid The composite ionic liquid formed, and then the mixed solution was added into a bubble bed reactor with a constant temperature circulating water bath jacket. Turn on the circulating water bath, and control the temperature of the water bath to 40°C, then blow in isobutylene under the pressure of 0.2MPa, and control the reaction temperature not to exceed 50°C. It is precipitated from the ionic liquid and floats on the surface of the ionic liquid. The tert-butylphenol product in the upper layer was removed and rectified under reduced pressure to obtain 52 kg of 6-tert-butyl-m-ethylphenol product and 93 kg of 2-tert-butyl-p-ethylphenol product.

[0024] Add 52 kg of 6-tert-butyl-m-ethylphenol product obtained by rectification into the cracking kettle, and ...

Embodiment 3

[0026] Dissolve 300 kg of a mixture of m-ethylphenol and p-ethylphenol (the mass content of m-ethylphenol is 47%, and the mass content of p-ethylphenol is 53%) in 700 kg of nitrogen methylpyrrolidone bisulfate and sulfamic acid The composite ionic liquid formed, and then the mixed solution was added into a bubble bed reactor with a constant temperature circulating water bath jacket. Turn on the circulating water bath, and control the temperature of the water bath to 60°C, then blow in isobutylene under the pressure of 0.5MPa, and control the reaction temperature not to exceed 70°C. It is precipitated from the ionic liquid and floats on the surface of the ionic liquid. The tert-butylphenol product in the upper layer was removed and rectified under reduced pressure to obtain 201 kg of 6-tert-butyl m-ethylphenol product and 229 kg of 2-tert-butyl-p-ethylphenol product.

[0027] Add 201 kg of 6-tert-butyl m-ethylphenol product obtained from rectification into the cracking kettle,...

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 provides a separation method of m-ethylphenol and paraethyl phenol, and particularly relates to a method using the steps that composite ion liquid is used as a catalyst and a solvent; under a certain condition, m-ethylphenol and paraethyl phenol are subjected to tert-butylation and rectification so that the two isomers are separated; then, tertiary butyl removal is performed to obtain m-ethylphenol products and paraethyl phenol products.

Description

technical field [0001] The present invention relates to a kind of separation method of m-ethylphenol and p-ethylphenol, more specifically, relate to a kind of utilizing m-ethylphenol and p-ethylphenol first tert-butylation and then rectification to make two isomers Separate, and then obtain m-ethylphenol product and p-ethylphenol product by taking off tert-butyl. technical background [0002] p-Ethylphenol is an important pesticide intermediate, which can produce a series of high-grade, low-toxicity, and low-residue pesticides. In addition, it is also a raw material for the production of synthetic resins, medicines, and plasticizers. At present, in the production method of p-ethylphenol, there are generally two products of m-ethylphenol and p-ethylphenol at the same time, and because the difference in boiling point of these two isomers is very small, it is difficult to separate the two isomers by ordinary rectification. or completely separated, so other methods of separatio...

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): C07C37/50C07C37/86C07C39/06B01J31/02
CPCC07C37/14C07C37/50C07C37/86B01J31/0284C07C39/06Y02P20/52
Inventor 李志萍刘凤菊
Owner 陕西巴斯腾科技有限公司
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