Method for preparing cylohexanediol diglycidyl ether

Abstract

The invention discloses a method for preparing cylohexanediol diglycidyl ether. The method comprises: generating cyclohexanediol through the hydration of cyclohexene oxide; synthesizing o-chlorohydrin ether through the ring-opening reaction of dehydrated cyclohexanediol and epichlorohydrin; reacting the o-chlorohydrin ether and alkali to synthesize 1,2-cylohexanediol diglycidyl ether crude products; and obtaining products by performing oil-water separation, washing and filtration on the crude products and distilling out light components, wherein catalysts for both hydration and ring-opening reaction are fluoboric acid, and the mol ratio of cyclohexene oxide to water to fluoboric acid to epichlorohydrin is 1:5-50:0.002-0.1:1.8-2.5. The method has the advantages of taking fluoboric acid as the catalysts for both hydration and ring-opening reaction, realizing the organic unity of the catalysts in a two-step process, reducing energy consumption, shortening process time, avoiding large amounts of waste water produced by repeated recrystallization during the purification of cyclohexanediol and helping to environmental protection.

Description

technical field [0001] The invention relates to a method for preparing cyclohexanediol diglycidyl ether. Background technique [0002] 1,2-Cyclohexanediol diglycidyl ether is an epoxy additive with excellent performance. The common method is to hydrate epoxycyclohexane under the action of a hydration catalyst to generate crude 1,2-cyclohexanediol product, and then remove the color and impurities of the crude 1,2-cyclohexanediol product through repeated recrystallization; Then use 1,2-cyclohexanediol product and epichlorohydrin to synthesize chlorohydrin ether under the action of ring-opening catalyst; finally, react chlorohydrin ether with alkali to synthesize 1,2-cyclohexanediol diglycidol Ether crude product, wash the crude product to neutrality, filter and distill off the light component to obtain the product. [0003] The hydration catalysts used in the above process are usually sulfuric acid, sulfonic acid, acidic resin, etc. Such oxoacids generally have strong oxidiz...

AI Technical Summary

Problems solved by technology

Although this type of catalyst solves the disadvantages of strong water absorption, strong volatility, high toxicity, and strong corrosion to equipment of the boron trifluoride ether complex catalyst, and the perchlorate catalyst is also convenient to use, but because the catalyst is in a solid state Existence, is a heterogeneous reaction system, low catalytic activity, high reaction temperature, used to synthesize high boiling point 1,2-cyclohexanediol diglycidyl ether will not only increase energy consumption, but also deepen the color of the product, Reduce product quality