Ethylamine catalyst prepared by mechanochemical method and usage method of catalyst

Abstract

The invention provides an ethylamine catalyst prepared by a mechanochemical method. By adopting the mechanochemical method, the catalyst for the catalytic amination of ethylamine is obtained by carrying out ball milling on a mixture prepared from sepiolite, aluminum oxide, nickel sesquioxide, cobaltosic oxide, indium sesquioxide and silver oxide, then adding nitric acid to carry out a first ball milling reaction, and then adding ammonium carbonate to carry out a second ball milling reaction. The preparation of the ethylamine catalyst by adopting the mechanochemical (ball milling) method has the advantages that preparation steps are a few; the output of wastewater is low; the price of raw materials are relatively lower. The catalyst provided by the invention is used for a reaction for the catalytic amination of ammonia and ethanol in a hydrogen-containing condition to produce the ethanol, and the catalyst is indicated to have higher activity and selectivity.

Description

technical field [0001] The invention belongs to the production technology of low-carbon aliphatic amines, and in particular relates to an ethylamine catalyst prepared by a mechanochemical method and a method for using the catalyst. Background technique [0002] Low-carbon aliphatic amines, including monoethylamine, diethylamine, triethylamine, mono-n-propylamine, di-n-propylamine, tri-n-propylamine, mono-isopropylamine, di-isopropylamine, mono-n-butylamine, di-n-butylamine, tri-n-propylamine Butylamine, isobutylamine, diisobutylamine, etc. Among them, monoethylamine, diethylamine, and triethylamine are mainly produced by catalytic amination of ammonia and ethanol under the condition of hydrogen. Its reaction mechanism is [0003] C 2 h 5 OH→CH 3 CHO+H 2 [0004] CH 3 CHO+NH 3 →CH 3 CHNH+H 2 o [0005] CH 3 CHNH+H 2 →C 2 h 5 NH 2 [0006] CH 3 CHO +C 2 h 5 NH 2 →C 2 h 5 NCHCH 3 +H 2 o [0007] C 2 h 5 NCHCH+H 2 →(C 2 h 5 ) 2 NH [0008] CH 3...

AI Technical Summary

Problems solved by technology

Patents (201210054452.9, 2007100646150, 011262915, 011262885) etc. disclose catalysts for the production of ethylamine. The above-mentioned catalysts are prepared by traditional methods (impregnation method), and there is a problem of uneven loading of active sites, especially in the pores of the catalyst. Due to the limitation of diffusion, the distribution of active sites in the depth of the channel is sparse