Liquid alkylated diphenylamine antioxidant

Details Liquid alkylated diphenylamine antioxidant Liquid alkylated diphenylamine antioxidant

1995-09-13

1997-09-30

Burn, Brian M.

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

Organic compounds

Amino nitrogen containing

C07C20968

Patent

active

056727526

ABSTRACT:
A process for monoalkylating diphenylamine using clay catalyst is disclosed which results in a reaction product having substantial amounts of desirable monoalkylated diphenylamine and minimal amounts of less desirable disubstituted diphenylamine and unsubstituted diphenylamine. The disclosed process uses clay catalysts which favor monoalkylation over dialkylation and specific conditions such as reaction temperature and mole ratios of alkylating olefin to diphenylamine.

REFERENCES:
patent: 2943112 (1960-06-01), Popoff et al.
patent: 3452056 (1969-06-01), Sundholm
patent: 3655559 (1972-04-01), Holt
patent: 4824601 (1989-04-01), Franklin
patent: 5214211 (1993-05-01), Kurek et al.
Chemical Reactions on Clays by Pierre Laszlo in Science vol. 235, pp. 1473-1477, published by American Association for the Advancement of Science, Washington, D.C., Mar., 1987.

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