Method for production of cyclohexylamines

Details Method for production of cyclohexylamines Method for production of cyclohexylamines

1988-04-06

1990-04-03

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

C07C 8736

Patent

active

049142399

ABSTRACT:
Disclosed is a method for continuous production of a cyclohexylamine compound by liquid phase hydrogenation of an aniline compound selected from aniline, nuclearly lower alkyl-substituted aniline, N-(lower alkyl)aniline and N,N-di(lower alkyl)aniline with hydrogen gas in the presence of a nickel catalyst, which comprises continuously feeding an aniline compound, continuously hydrogenating the aniline compound in the absence of a solvent and in the presence of an ammonia compound at a reaction pressure of about 2 to 10 kg/cm.sup.2 and at about 210.degree. to 240.degree. C., continuously withdrawing a product gas containing product cyclohexylamine compound, unreacted aniline compound, byproducts, hydrogen and ammonia compound from the reaction system, separating the hydrogen and ammonia compound from the product gas, separating the unreacted aniline compound and byproducts from the cyclohexylamine compound and recycling the unreacted aniline compound and byproducts to the reaction system continuously together with starting material feed aniline compound.

REFERENCES:
patent: 3565921 (1971-02-01), Gobron et al.

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