Catalyst for preparing glycolether and its production process

Abstract

The invention relates to a catalyst used to produce glycol ethers, esp. modification aluminium salt. Its steps are as follows: make aluminium sulphate dissolve into water; adding superfluous ammonia into the solution; adjusting PH value between 6 and 9; washing and filtering produced aluminium hydroxide; removing NH4+; making washed aluminium hydroxide neutralization reaction with perchloric acid; dehydrating, drying and wrapping reactant to get perchloric acid aluminium. The invention uses modification aluminium salt to replace sulphoacid zinc as catalyst, which has a high activation and yield and can reduce production cost. In addition, the produced aluminium hydroxide is easy to wash because ammonia is a little superfluous. The reaction can be made in normal temperature, reduce energy consumption, simplify equipment and save cost.

Description

technical field [0001] The present invention relates to catalysts for the preparation of glycol ethers, in particular to catalysts for the preparation of modified aluminum salts of glycol ethers. Background technique [0002] Ethylene glycol ether reacts with ethylene oxide and ethanol as raw materials. Since its structure contains two groups of ether bond and hydroxyl group, glycol ether products are excellent industrial solvents and can be widely used in coatings, Printing, dyes, inks and other industries. The catalyst mainly used at present is zinc dimethyl sulfonate, but this catalyst has the disadvantages of high catalyst production cost, low activity, large dosage and high reaction temperature, which affects its use. Contents of the invention [0003] The object of the present invention is a catalyst for the preparation of glycol ether, which is used in the etherification process of ethylene oxide, has higher reaction yield, and lower production cost simultaneously....

AI Technical Summary

Problems solved by technology

At present, the main catalyst used is zinc dimethyl sulfonate, but this catalyst has the disadvantages of high catalyst production cost, low activity, large dosage, and high reaction temperature, which affects its use.