Method for preparing sec-butylamine

A technology of sec-butylamine and sec-butanol, which is applied in the field of preparation of sec-butylamine, can solve the problems of low yield of sec-butylamine, harsh reaction conditions, long reaction time, etc., achieve high yield, mild reaction conditions, and yield high rate effect

Inactive Publication Date: 2006-05-24
ZHEJIANG JIANYE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of long reaction time, harsh reaction conditions and low yield of sec-butylamine in the existing technology, and provide a method for preparing sec-butylamine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A fixed-bed reactor is adopted, and the reactor specification is 30×500mm, and 45g of modified cobalt catalyst is installed inside, and the active component in the catalyst is cobalt, and the cocatalyst includes Al and Ba, wherein in terms of relative Co atomic ratio, Co: Al: Ba=1:0.02:0.05. The molar ratio of raw materials sec-butanol:ammonia:hydrogen is 1:2.5:5, at a reaction temperature of 130°C, the reaction pressure is 1.5Mpa in terms of gauge pressure, and the reaction space velocity is 0.45h -1 , the sec-butanol conversion rate is 98%, and the sec-butylamine yield is 97.5% (weight).

Embodiment 2

[0017] According to each operation step and condition of embodiment 1. Only in the reaction conditions, the reaction temperature is 145°C, the reaction pressure is 1.4Mpa in terms of gauge pressure, and the reaction space velocity is 0.3h -1 , the sec-butyl alcohol conversion rate is 99.5%, and the sec-butylamine yield is 99.2% (weight).

Embodiment 3

[0019] According to each operation step and condition of embodiment 1. Change the feed ratio of sec-butanol:ammonia:hydrogen=1:3:4.5, the reaction temperature is 160°C, the reaction pressure is 1.7Mpa in terms of gauge pressure, and the reaction space velocity is 0.4h -1 , the sec-butyl alcohol conversion rate is 99%, and the sec-butylamine yield is 99% (weight).

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Abstract

The invention relates to a method for preparing sec-butyl amine by continuous fixed bed solid phase catalysis, feeding raw materials sec-butyl alcohol, ammonia and hydrongen into a fixed bed reactor in the molar concentration of 1 to (1-5) to (2-6), and producing the sec-butyl amine by reacting under the action of catalyst, at temperature 110-180 deg.C, at pressure 1.0-2.0 MPa, and at airspeed 0.2-0.6h-1, where sec-butyl amine per ton consumes 0.4kg of catalyst. The effects of the invention: the invention uses Al and Ba containing denatured cobalt as catalyst and the sec-butyl alcohol conversion is up to 100%, and the sec-butyl amine yield can be up to 98.5%, higher than that of each of methyl alcohol aminating method and butylenes aminating method.

Description

technical field [0001] The invention relates to a method for preparing sec-butylamine, in particular to a method for preparing sec-butylamine by hydroamination of sec-butanol. Background technique [0002] S-butylamine (sec-butylamine, di-sec-butylamine) is an important organic chemical intermediate, widely used in pesticides, pharmaceuticals, chemical additives, dyes, rubber industries, etc. [0003] The industrial production methods of sec-butylamine mainly include methyl ethyl ketone amination method and butene amination method. [0004] According to data reports: methyl ethyl ketone ammonification method is to use methyl ethyl ketone as raw material, with Ni-Cr-HPO 3 As a catalyst, at a reaction temperature of 115°C and a space velocity of 0.15h -1 , Continuous production of sec-butylamine under the condition of raw material methyl ethyl ketone: hydrogen: ammonia = 1: 3.5: 4.5 mol. The conversion rate of methyl ethyl ketone is 98%, and the yield of sec-butylamine is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/16C07C211/07
Inventor 陈新发钱日华王烈锋王讯文
Owner ZHEJIANG JIANYE CHEM
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