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A method for the catalytic synthesis of bisphenol-F by sheet-like al-sba-15 mesoporous molecular sieves

A mesoporous molecular sieve, al-sba-15 technology, applied in molecular sieve catalysts, chemical instruments and methods, preparation of organic compounds, etc., to achieve the effects of easy separation and recovery, low preparation cost, and high catalytic activity

Active Publication Date: 2016-02-03
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is: aiming at the defects of the long channels of common SBA-15 mesoporous molecular sieves, a method for catalytically synthesizing bisphenol F with sheet-like Al-SBA-15 mesoporous molecular sieve catalysts with short straight channels is provided to accelerate Diffusion rate of reactants in the channel and reduce the probability of the channel being blocked

Method used

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  • A method for the catalytic synthesis of bisphenol-F by sheet-like al-sba-15 mesoporous molecular sieves
  • A method for the catalytic synthesis of bisphenol-F by sheet-like al-sba-15 mesoporous molecular sieves
  • A method for the catalytic synthesis of bisphenol-F by sheet-like al-sba-15 mesoporous molecular sieves

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of flake Al-SBA-15 mesoporous molecular sieve catalyst

[0029] Step 1: Add 9 grams of tetraethyl orthosilicate and 0.44 grams of aluminum isopropoxide to 20 mL of 0.03 mol / L hydrochloric acid solution, fully stir and dissolve into solution A, add 4 grams of Pluronic123 and 0.64 grams of zirconium oxychloride to In 140mL of 0.03mol / L hydrochloric acid solution, fully stir and dissolve to form solution B, and slowly add solution A to solution B under sufficient stirring conditions to obtain mixture C;

[0030] The second step: Stir the mixture C obtained in the first step at 35°C for 24 hours, then transfer it to a polytetrafluoroethylene-lined hydrothermal kettle, stand at 100°C for crystallization for 48 hours, filter, and wash the filter cake with water for 3 times , dried, and calcined at 550° C. for 6 hours to obtain 3 grams of sheet-like Al-SBA-15 mesoporous molecular sieve catalyst, wherein the Si / Al molar ratio of the catalyst was 20:1.

[0031] ...

Embodiment 2

[0041]With embodiment 1, its difference is that aluminum isopropoxide consumption is 0.176 gram in the first step of preparing flake Al-SBA-15 mesoporous molecular sieve catalyst, the prepared flake Al-SBA-15 mesoporous molecular sieve catalyst Si / Al molar ratio is 50:1, and the yield of bisphenol F is 80.6%.

Embodiment 3

[0043] With embodiment 1, its difference is that in the first step of preparing sheet-like Al-SBA-15 mesoporous molecular sieve catalyst, aluminum isopropoxide consumption is 1.76 grams, the Si of prepared sheet-like Al-SBA-15 mesoporous molecular sieve catalyst The / Al molar ratio was 5:1, and the yield of bisphenol F was 80.5%.

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Abstract

The invention discloses a method for realizing catalytic synthesis of bisphenol F by virtue of a flaky Al-SBA-15 mesoporous molecular sieve catalyst. The method comprises the following steps: on the basis of taking polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (Pluronic 123) as a template, tetraethoxysilane (TEOS) as a silicon source and aluminum isopropoxide as an aluminum source, adding zirconium oxychloride under very low hydrochloric acid concentration, and adopting a hydrothermal process for preparing the flaky Al-SBA-15 mesoporous molecular sieve catalyst; on the basis of taking phenol and formaldehyde as raw materials and a flaky Al-SBA-15 mesoporous molecular sieve as a catalyst, performing condensation reaction to prepare bisphenol F, wherein the yield of bisphenol F is 98.8%. According to the method, the catalyst is high in activity, other solvents are not used in catalyst preparation and bisphenol synthesis processes, environmental friendliness is achieved, and the catalyst is low in preparation cost, easy to separate and recover and reusable.

Description

technical field [0001] The invention relates to a method for catalytically synthesizing bisphenol F. Background technique [0002] Bisphenol F is an important chemical intermediate. Due to its chemical structure, it is suitable for the preparation of low-viscosity epoxy resin. Its finished products are excellent in heat resistance, moisture resistance, insulation, processability and injection molding. Because of the characteristics of bisphenol A epoxy resin, especially its ease of injection molding flow, less or even no diluent, it is especially suitable for the processing and molding of epoxy resin for large wind turbine blades, which greatly reduces environmental pollution and improves the processing environment . [0003] Patents US4400554, CN200810072071, and JP58177928 respectively report methods for synthesizing bisphenol F with inorganic acids such as phosphoric acid, hydrochloric acid, and sulfuric acid. The catalytic yield of inorganic acids is high, but the equip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/16C07C37/20B01J29/70
CPCB01J29/70B01J2229/183C07C37/20C07C39/16
Inventor 李勇飞魏元峰刘跃进谈瑛吴志民何志成
Owner XIANGTAN UNIV
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