Base modified catalysis in the styrenation of diphenylamine

Details Base modified catalysis in the styrenation of diphenylamine Base modified catalysis in the styrenation of diphenylamine

1978-11-13

1979-08-07

Hines, Robert V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260576, C07C 8518

Patent

active

041637577

ABSTRACT:
Diphenylamine is reacted with styrene in the presence of a base modified acid clay catalyst to improve yields of the p-styrenated diphenylamine (DPA), particularly the distyrenated DPA. Fuller's Earth exemplifies the clay, while KOH exemplifies the base. The highly p-styrenated diphenylamine is an active antioxidant with low volatility.

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Robertson, "Clay Minerals Bulletin," 1, (2), pp. 47-54, (1948).
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