Prepn process and application of catalyst for preparing lower C2-C4 alcohol

Abstract

The catalyst consists of carrier SiO2, alumina, diatomite, etc; and the carried active components Co, Ca, Fe, etc. which accounts for 10-50 wt% of the catalyst and has the atom ratio of Co, Ca and Fe equal to 1 to 0.05-0.8 to 0-0.1. The catalyst may be prepared through one of precipitation process, soaking process and soaking-precipitation process. The catalyst is suitable for various amination reactions, especially the preparation process of lower aliphatic amine. When the catalyst is used, amine may be prepared at relatively low pressure and temperature, and the ratio between primary amine, secondary and tertiary amine may be regulated in relatively wide range.

Description

technical field [0001] The invention relates to a catalyst for preparing lower aliphatic amines, in particular to a catalyst for preparing amines from lower aliphatic alcohols and corresponding aldehydes and ketones by ammoniation in a state of hydrogenation, as well as its preparation method and application. Background technique [0002] In the chemical industry, amine compounds include primary amines, secondary amines, and tertiary amines, and are widely used in pesticides, medicines and other fields. They are usually prepared by hydroamination of alcohols and corresponding aldehydes and ketones in the presence of hydrogen and catalysts. The mechanism of hydroamination reaction can be divided into three steps: the first step is the dehydrogenation of raw material alcohols to form aldehydes or Ketones; in the second step, the addition of aldehydes or ketones to ammonia produces imines; in the third step, further hydrogenation of imines produces amines. [0003] U.S. Patent...

AI Technical Summary

Problems solved by technology

Although the generated primary, secondary and tertiary amines can be adjusted within a certain range, the adjustment range is small, especially for tertiary amines.