High-temperature-resistant fluorine-containing resin catalyst and preparation method thereof

Abstract

The invention provides a high-temperature-resistant fluorine-containing resin catalyst which is prepared by the steps of: with polymerized white balls of the resin catalyst as raw materials, fully swelling the white balls with a solvent, acylating with an acylating agent, adding a halogen element for halogenating, and finally introducing sulfo groups through sulfonation of a sulfonating agent. The high-temperature-resistant fluorine-containing resin catalyst is suitable for a reaction process with a reaction temperature of higher than 150 DEG C, and can be used for a long time at a temperature of below 200 DEG C. The invention also provides a preparation method of the high-temperature-resistant fluorine-containing resin catalyst.

Description

technical field [0001] The invention relates to a resin catalyst, in particular to a high temperature resistant resin catalyst and a preparation method thereof. Background technique [0002] The sulfonic acid group on the sulfonated cation exchange resin is easy to fall off under the reaction conditions, especially when the temperature is high, resulting in the protonation of the aromatic ring of the cation exchange resin. Since the catalytic activity of the styrene-divinylbenzenesulfonic acid resin catalyst is directly proportional to the concentration of the active group sulfonic acid group, the shedding of the sulfonic acid group will lead to a decrease in the activity of the resin catalyst. Electron-absorbing groups can reduce the desulfonation rate. Therefore, an electron-withdrawing group is generally introduced on the benzene ring to prevent and reduce the shedding of the sulfonic acid group and increase the thermal stability of the sulfonic acid group in the catalyt...

AI Technical Summary

Problems solved by technology

[0007] However, when the high-temperature resistant cation exchange resin catalysts produced at home and abroad react at high temperatures above 150°C, the resin catalysts contain sulfonic acid groups, which are easy to fall off under high-temperature reaction conditions, and the fallen sulfonic acid groups become sulfonic acid ions in water, making The conductivity of circulating water is high, which affects the recycling of circulating water