Alkylation of aromatic amines over thermally pretreated zeolites

Details Alkylation of aromatic amines over thermally pretreated zeolites Alkylation of aromatic amines over thermally pretreated zeolites

1990-03-27

1991-06-25

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564307, 560 19, 560 46, 560 47, 560 48, 558376, C07C20968

Patent

active

050269127

ABSTRACT:
A process for selectively producing ortho-alkylated aromatic amines in high selectivity relative to N-alkylated aromatic amines. The process comprises reacting an aromatic amine, having at least one hydrogen atom in a position ortho to the amine functionality, and an olefin under conditions sufficient to effect an alkylation reaction, in the presence of a zeolite catalyst which has been thermally pretreated by heating the catalyst to a temperature greater than about 500.degree. C. for a period ranging from 0.5 to about 10 hours while sweeping an inert gas over the heated catalyst to remove water and ammonia formed during the thermal treatment, and subsequently recovering the alkylated aromatic amine.

REFERENCES:
patent: 4740620 (1988-04-01), Dixon et al.
patent: 4760184 (1988-07-01), Pierantozzi
patent: 4795833 (1989-01-01), Mitchell
patent: 4804784 (1989-02-01), Weigert
patent: 4851579 (1989-07-01), Pierantozzi
patent: 4876377 (1989-10-01), Agrawal et al.

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