Catalyst for preparing ethylamine compounds, preparation method and application thereof

Abstract

The invention relates to a catalyst used for preparing compounds such as ethylamine composed of pure phase molybdenum phosphide of which the molar ratio ranges from 0.50 to 3.00 or agent-loaded molybdenum phosphide of which the molar ratio ranges from 0.8 to 1.5. The catalyst is applied to gas phase acetonitrile to choose hydrogenation in the preparation of compounds such as ethylamine. As for pure phase molybdenum phosphide, the selectivity of the acetonitrile choosing hydrogenation is controlled by simply changing the material feeding ratio of molybdenum and phosphor. When the ratio of the molybdenum and the phosphor is larger than 1.05, the selectivity of the ethylamine is very high; when the ratio of the molybdenum and the phosphor is less than 0.9, the selectivity of diethylamine and triethylamine is very high. As for the carrier-loaded molybdenum phosphide catalyst, the simple change of the type of the carrier can reach the high selectivity of different compounds such as ethylamine, thereby being beneficial for effectively separating the compounds such as ethylamine. The catalyst has simple and practical operation, and is suitable for industrial productions of different compounds such as ethylamine by choosing hydrogenation for acetonitrile.

Description

technical field [0001] The invention relates to a catalyst for preparing ethylamine compounds. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above catalyst in the preparation of ethylamine compounds. Background technique [0004] As a new type of catalytic material, transition metal phosphides have received extensive attention in the research of hydrorefining. However, for many hydrogen-related reactions, such as hydrogenation reaction, ammonia synthesis, NO reduction and electrochemical reduction reaction, there are relatively few studies in this area. However, the application of transition metal phosphides in the selective hydrogenation of acetonitrile has not been reported. [0005] The selective hydrogenation of acetonitrile to prepare amine compounds (ethylamine, diethylamine and triethylamine) has great significance in industrial applications. ...

AI Technical Summary

Problems solved by technology

At present, Raney nickel is generally used as a catalyst, but its selectivity to products is not high. In addition, its preparation requires a large amount of lye, which also has an impact on the environment.

However, precious metals are used as catalysts, which limit their application due to their high price.

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