Zinc catalyst for catalyzing acetylene hydration reaction and preparation method of zinc catalyst

Abstract

The invention relates to a zinc catalyst for catalyzing an acetylene hydration reaction and a preparation method of the zinc catalyst. The method for preparing the zinc catalyst for catalyzing an acetylene hydration reaction comprises the following steps of (1) preparing a modified carrier: adding a modifying agent to a molecular sieve precursor liquid, performing uniform mixing, performing filtering, performing drying, performing calcining and performing roasting to obtain the modified carrier; (2) preparing the catalyst precursor salt liquid: enabling zinc salt to completely dissolve in water to obtain the catalyst precursor salt liquid; and (3) preparing the catalyst: dropwise adding the catalyst precursor salt liquid to the modified carrier, performing immersing for 12h, and performingdrying to obtain the zinc catalyst. According to the zinc catalyst for catalyzing an acetylene hydration reaction and the preparation method of the zinc catalyst, the preparation cycle is short, andthe operation is simple; and the prepared zinc catalyst is a non-mercury catalyst for the acetylene hydration reaction, so that mercury pollution to environment can be avoided. The prepared zinc catalyst is high in activity and high in selectivity in the acetylene hydration reaction.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a zinc catalyst for catalyzing the hydration reaction of acetylene and a preparation method thereof. Background technique [0002] Acetaldehyde is an important fine chemical intermediate and an important basic organic synthesis intermediate for the production of acetic acid, acetic anhydride, butyraldehyde, butanol, etc. Since the industrial production of acetaldehyde by hydration of acetylene in 1961, acetylene has become an important raw material in coal-based chemicals. However, with the vigorous development of petrochemical industry, the process of hydrating acetylene to produce acetaldehyde was gradually replaced by the process of oxidizing ethylene to produce acetaldehyde. However, due to China's huge coal reserves, and the continuous improvement of the calcium carbide acetylene production process, the cost has gradually decreased, and the product quality has continued to improve....

AI Technical Summary

Problems solved by technology

[0005] At present, the hydration reaction of acetylene is basically carried out at a relatively high temperature, and there are problems such as high energy consumption and low selectivity.

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