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Method for preparing methylamine by using methanol gas ammonification method

A technology for preparing methylamine and methanol, which is applied to the preparation of amino compounds, chemical instruments and methods, and the preparation of organic compounds, and can solve problems such as difficulty

Inactive Publication Date: 2012-01-25
天津东方宜信物流有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is not easy to separate them, so this method is somewhat limited in industrial applications

Method used

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  • Method for preparing methylamine by using methanol gas ammonification method

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Experimental program
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Effect test

Embodiment 1

[0019] Mix methanol:ammonia=1:4 in parts by weight, use a mixture of activated alumina and silicon oxide as a catalyst, the reaction temperature is 250°C, the reaction pressure is 0.5MPa, and the space velocity is 1500h-1. see details figure 1 .

Embodiment 2

[0021] Mix methanol:ammonia=1:4 in parts by weight, use a mixture of activated alumina and titanium dioxide as a catalyst, the reaction temperature is 500°C, the reaction pressure is 5.0MPa, and the space velocity is 500h-1, see figure 1 .

Embodiment 3

[0023] Methanol: ammonia=1: 4 parts by weight are mixed, adopt the mixture that adopts activated alumina, thorium oxide, chromium oxide various metal oxides to make catalyst, reaction temperature is 400 ℃, reaction pressure 4.5.0MPa, space velocity is 800h-1, see details figure 1 .

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Abstract

The invention discloses a method for preparing methylamine by using a methanol gas ammonification method. The method is characterized by mixing methanol and ammonia in a weight ratio of 1:4 and using the mixture of various metallic oxides as activated alumina, silicon oxide, titanium dioxide, tungsten trioxide, clay, thorium oxide and chromium oxide as a catalyst, wherein the reaction temperature is 250-500 DEG C; the reaction pressure is 0.5-5.0MPa; and the air seed is 500-1500h<-1>. In terms of ammonia and methanol, the product yield is more than 95% and the product purity is 99%. The preparation method has reasonable process, is simple in preparation and is the simplest and most convenient and ideal technology for preparing methylamine.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for preparing monomethylamine by methanol vapor-phase ammoniation, which is suitable for producing monomethylamine. Background technique [0002] Gas chromatography (GC for short) is a kind of chromatography. There are two phases in chromatography, one is the mobile phase and the other is the stationary phase. If a liquid is used as the mobile phase, it is called liquid chromatography, and a gas is used as the mobile phase, it is called gas chromatography. Methylamine (CH3NH2) is a colorless gas at normal temperature and pressure, and its specific gravity is 1.07 times that of air. Flammable, explosive, with a strong irritating ammonia-like odor. Alkalinity is stronger than ammonia. Generally pressurized into liquid storage or transportation. Monomethylamine can be absorbed through the respiratory tract, gastrointestinal tract and skin, and converted into dimethylamine or ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/04C07C209/16
Inventor 梁喜乐
Owner 天津东方宜信物流有限公司