Composite acid supported catalyst and catalytic synthesis method of bisphenol F

Abstract

The invention discloses a composite acid supported catalyst and a catalytic synthesis method of bisphenol F. A synthesis method of the composite acid supported catalyst comprises the following steps: adding phosphoric acid, diatomite, LiCl and titanium dioxide to ethanol according to a certain ratio, and refluxing and stirring above raw materials overnight (for 12-24h); and recovering ethanol after the above reaction ends, washing the obtained material with water 3 times, and carrying out vacuum drying for 12h to obtain the composite acid supported catalyst. The synthesis method of bisphenol F comprises the following steps: adding phenol and the composite acid catalyst to a reaction container, adding xylene, stirring above materials at room temperature, adding 37% of an aqueous formaldehyde solution in a dropwise manner, and heating the obtained solution to 100-150DEG C, wherein the temperatures are 100DEG C, 125DEG C and 150DEG C respectively, toluene is adopted as a solvent, and the reaction time is 2-8h; and recovering the catalyst, the solvent and phenol, and re-crystallizing the above obtained product with the recovered solvent to obtain pure bisphenol F. The catalyst has the advantages of increase of the bisphenol F yield, simple synthesis method, low cost, high catalysis activity and reusability.

Description

technical field [0001] The present invention relates to a compound acid-loaded catalyst and the synthesis of catalytic bisphenol F. The downstream products derived from bisphenol F are superior to similar products using bisphenol A as raw materials in many aspects, such as heat and humidity resistance, insulation, processing In terms of mechanical properties and other aspects, it can meet the performance requirements of flame-retardant materials, casting and casting molding, electronic-grade epoxy resin, and large-scale wind power epoxy resin. It has good application prospects and belongs to the field of chemical materials and pharmaceuticals. Background technique [0002] Bisphenol F (BPF) is an important chemical intermediate obtained by condensation reaction of phenol and formaldehyde through hydroxyalkylation, including 2,2'-bisphenol F, 2,4'-bisphenol F and 4,4'- There are three isomers of bisphenol F, among which 4,4'-bisphenol F isomer has the best performance. Bisph...

AI Technical Summary

Problems solved by technology

The invention designs and synthesizes a novel composite acid-loaded catalyst, which adopts lithium chloride as a metal-organic framework and introduces phosphoric acid and titanium dioxide to make it, which greatly improves the performance of the catalyst. It is used in the synthesis of bisphenol F, which can increase the yield of the reaction and make it more efficient. The most important thing is to improve the selectivity of the reaction and save the cost; the catalyst has not been reported yet