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Reaction method of aromatics of tertiary butyl by using methyl tert-butyl ether as alkylating agent

A technology for tert-butylation of methyl tert-butyl ether, which is applied in the field of tert-butylation of aromatic hydrocarbons using methyl tert-butyl ether as an alkylating agent, can solve the problem of high operational risk, impact on economic benefits, Long response time and other issues, to achieve the effect of improving economic benefits, reducing costs, and short response time

Inactive Publication Date: 2003-10-01
MAOMING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of its existence are that the reaction time is long, and the solvent xylene is a toxic flammable and explosive substance, which is dangerous to operate and high in cost, which affects economic benefits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In the reactor with thermometer, stirrer and reflux condenser, add catechol 28g, methyl tert-butyl ether 22g, concentration is 98% sulfuric acid 1.4g, stir and heat up to 100 ℃, hold time 1.5h, The content of the obtained product p-tert-butyl-o-diphenol was 55.66%.

Embodiment 2

[0016] Add catechol 28g, methyl tert-butyl ether 22g, 701 type cation exchange resin 2.75g in the reactor with thermometer, stirrer and reflux condenser, heat up to 120 ℃ and stir for 2.5 hours to obtain the product pair The content of tert-butyl catechol is 25.36%.

Embodiment 3

[0018] Add phenol 23.5g in the reactor with thermometer, stirrer and reflux condenser, after being heated to 130 ℃, add methyl tert-butyl ether 23.7g, concentration is 2.57g of sulfuric acid of 98%, stirring reaction 3 hours, Obtain 23g of p-tert-butylphenol of the product.

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PUM

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Abstract

A process for using methyl tert-butyl ether as hydroxylating agent in tert-butylation reaction of aryhydrocarbon compound features use of acid as catalyst. Its advantages are mild reaction, short reaction time and low cost.

Description

technical field [0001] The invention relates to a chemical reaction method for the production of fine chemical products, in particular to an aromatic hydrocarbon tert-butylation reaction method using methyl tert-butyl ether as an alkylating agent. Background technique [0002] The classic Fridel-Crafts alkylation reaction (abbreviated as F-C alkylation reaction) is the alkylation reaction of aromatic rings with alkyl halides, alcohols, and olefins in the presence of a catalyst. Science Press published in 1984 Yu Lingchong's " It is recorded on pages 125-129 of "Personal Name Reaction in Organic Chemistry" that the introduction of tert-butyl on the aromatic ring is called F-C tert-butylation reaction. This reaction has developed a series of fine chemical products, such as p-tert-butyl catechol, a high-efficiency polymerization inhibitor for monomer olefins in the process of refining, storage and transportation; antioxidant or anti-aging for high polymers such as polypropylene...

Claims

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Application Information

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IPC IPC(8): C07B37/00C07C1/30C07C15/02C07C37/16C07C39/06
Inventor 汪树清方子严方晓强
Owner MAOMING COLLEGE
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