Flexible process for the production of di and trialkylamines

Details Flexible process for the production of di and trialkylamines Flexible process for the production of di and trialkylamines

C - Chemistry, Metallurgy

07

C

260/609

C07C 209/60 (2006.01) C07C 209/16 (2006.01) C07C 211/03 (2006.01)

Patent

CA 2007861

This invention relates to a process for the nonequilibrium controlled production of di and trialkylamines containing at least one C2-4 alkyl substituent in high selectivity by the catalytic amination of an alkanol with ammonia under conditions for forming said mono, di and trialkylamines. The improvement in the process for producing di and trialkylamines comprises: initially contacting a C1-4 alkanol with ammonia in the presence of hydrogen, under conditions for forming a mixture of mono, di and trialkylamines; separating the monoalkyl and dialkylamines from the trialkylamine formed in the initial amination of the alkanol; and contacting the dialkylamine with a C2-4 alkanol in a fixed bed reactor under gas phase conditions in the presence of hydrogen and a cobalt or nickel containing hydrogenation catalyst, the mole ratio of alkanol to dialkylamine ranging from 1 to 3:1, the reaction temperature ranging from 275 to 400°F, the pressure ranging from 150 to 350 psig and the gas hourly space velocity ranging from 500 to 2000 hr-1. Monoalkylamine is converted to dialkylamine by reaction with a C2-4 alkanol in a fixed bed reactor under gas phase conditions in the presence of hydrogen and a cobalt or nickel-containing hydrogenation catalyst, the mole ratio of alkanol to monoalkylamine ranging from about 1 to 3:1, the reaction temperature ranging 275 to 400°F, the pressure ranging from 150 to 350 psig a gas hourly space velocity of 500 to 2000 hr-1.

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