Process for producing N,N-dimethyl-N-alkylamine or N,N-dimethyl-

Details Process for producing N,N-dimethyl-N-alkylamine or N,N-dimethyl- Process for producing N,N-dimethyl-N-alkylamine or N,N-dimethyl-

1996-09-19

1997-12-09

Burn, Brian M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564479, 564509, C07C20916

Patent

active

056962940

ABSTRACT:
N,N-Dimethyl-N-alkylamine or -alkenylamine is prepared by reacting a higher alcohol and dimethylamine by passing hydrogen gas and dimethylamine into a reactor containing a catalyst for the reaction at a pressure of atmospheric pressure to 100 atm. at 150.degree. C. to 250.degree. C. and removing water produced in the reaction as a component of the mixed hydrogen and unreacted dimethylamine gas which is discharged from the reactor, wherein at the point in the reaction at which from 90 to 99% of the higher alcohol has reacted with dimethylamine, one of the following procedures is followed: i) the introduction of only dimethylamine gas into the reactor is stopped, and the reaction is allowed to continue at a temperature 20.degree. to 150.degree. C. lower than the reaction temperature recited above; ii) the introduction of only dimethylamine gas into the reactor is stopped while the temperature is decreased to a level of 20.degree. to 150.degree. C. lower than the temperature recited above, and the reaction is allowed to proceed at the reduced temperature; or iii) the introduction of only dimethylamine gas into the reactor is stopped immediately after decreasing the temperature to a level of 20.degree. to 150.degree. C. lower than the temperature recited above, and the reaction is allowed to continue at the reduced temperature.

REFERENCES:
patent: 4293716 (1981-10-01), Swift et al.
patent: 4594455 (1986-06-01), Dudzinski
patent: 4625063 (1986-11-01), Yokota et al.
patent: 5075505 (1991-12-01), Forquy et al.
patent: 5266730 (1993-11-01), Abe et al.
patent: 5296631 (1994-03-01), Abe et al.
patent: 5530127 (1996-06-01), Reif et al.

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