Process for the preparation of tertiary N, N-dimethylamines

Details Process for the preparation of tertiary N, N-dimethylamines Process for the preparation of tertiary N, N-dimethylamines

1988-12-24

1991-02-26

Hollrah, Glennon H.

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

Organic compounds

544 2, 544 3, 544 59, 544 63, 544106, 544162, 544179, 544180, 544224, 546 26, 546143, 546159, 546244, 546264, 546304, 548122, 548123, 548124, 548125, 548130, 548138, 548161, 548190, 548212, 548222, 548233, 548244, 548245, 548251, 548255, 548256, 548257, 548379, 548337, 548351, 548372, 548483, 548557, 548951, 548953, 5482672, 549 9, 549 10, 549 11, 549 12, 549 21, 549 28, 549 38, 549 68, 549 88, 549225, 549243, 549253, 549321, 549346, 549371, 549394, 549404, 549439, 549467, 549480, 549505, 549510, 564308,

Patent

active

049963163

ABSTRACT:
A process for the preparation of tertiary N,N-dimethylamines by the reaction of primary amines, formaldehyde, and hydrogen under pressure and at elevated temperature in the presence of a nickel-containing hydrogenation catalyst in the liquid phase. The hydrogenation catalyst is suspended in a solvent, the nickel concentration is 0.1 to 10% by weight, based on the primary amine. The starting materials are separate from each other, brought to 80.degree. to 150.degree. C. and 1 to 15 MPa and fed into the catalyst suspension simultaneously with stirring and reacted in one step to form the tertiary N,N-dimethylamines.

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patent: 4757144 (1988-07-01), Okabe et al.
patent: 4792622 (1988-12-01), Yokota et al.

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