Method for catalytically synthesizing bisphenol A by solid acid

A solid acid catalysis, solid acid catalyst technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve the problems of selectivity and conversion rate is not too high, achieve simple process, mild reaction conditions, production low cost effect

Inactive Publication Date: 2007-11-28
HARBIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the catalysts for the catalytic synthesis of bisphenol A by phenol and acetone in the prior art are insufficient, and the selectivity and conversion rate are not too high, the present invention provides a method for catalytic synthesis of bisphenol A with solid acid
Catalysts can be separated and reused

Method used

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specific Embodiment approach 1

[0011] Specific implementation mode 1: In this implementation mode, phenol and acetone are used as raw materials to catalyze the synthesis of bisphenol A, and the specific operation steps are as follows:

[0012] The first step, put the reaction material:

[0013] Put 2-12 parts by weight of phenol, 1 part by weight of acetone and 0.05-0.15 parts by weight of the reaction material into the reactor, and the catalyst is H 2 SO 4 -SiO 2 solid acid;

[0014] The second step, catalytic synthesis reaction:

[0015] A condenser is installed on the reactor containing the reaction materials, and the catalytic synthesis reaction is carried out for 2 to 8 hours at 60-100 ° C under stirring;

[0016] The third step, product refining:

[0017] After the reaction in the second step is completed, filter under reduced pressure while it is hot to recover the catalyst. The filtrate is vacuum concentrated and dehydrated, and the excess phenol is evaporated, and then the raffinate is poured ...

specific Embodiment approach 2

[0019] Specific embodiment two: the difference between this embodiment and specific embodiment one is that H 2 SO 4 -SiO 2 H in solid acid catalyst 2 SO 4 with SiO 2 The weight ratio is 5:1.

specific Embodiment approach 3

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one is that H 2 SO 4 -SiO 2 H in solid acid catalyst 2 SO 4 with SiO 2 The weight ratio is 6:1.

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Abstract

The solid acid catalyzed bisphenol A synthesizing process belongs to the field of organic chemistry. The technological scheme of the present invention is that under the action of H2SO4-SiO2 solid acid catalyst, phenol and acetone are reacted directly to synthesize bisphenol A, with the catalyst adding amount being 5-15 wt% of the reacted material, the reaction temperature being 60-100 deg.c, and the reaction time being 2-8 hr. The present invention has the following advantages: mild reaction condition, bisphenol A selectivity over 93 %, material converting rate over 98 % and reusability of the catalyst.

Description

technical field [0001] The invention belongs to the field of organic chemistry and relates to a catalytic synthesis method of bisphenol A. Background technique [0002] The scientific name of bisphenol A is 2,2-bis(4-hydroxyphenyl)propane, which is an important raw material for the synthesis of polycarbonate, epoxy resin, and high-temperature-resistant polyester. In addition, bisphenol A is also widely used in the manufacture of coatings, adhesives, rubber antioxidants, pesticides and fungicides, flame retardants, etc. Industrially, bisphenol A is formed by condensation of phenol and acetone under the action of an acidic catalyst. According to different catalysts, it can be divided into sulfuric acid method, hydrogen chloride method and ion exchange resin method. The sulfuric acid method has a simple process and less equipment, but there are many by-products, and the purification of bisphenol A is very difficult. This method has basically been eliminated. The hydrogen chl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/20C07C39/16B01J27/053
CPCY02P20/52
Inventor 蔡清海侯丽杰路嫔韩媛媛李雪梅
Owner HARBIN NORMAL UNIVERSITY
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