Alkylation of diarylamines with olefins using rare earth modified pillared clays
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United States of America Patent
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May 25, 1993
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N/A
app pub date -
Dec 12, 1991
filing date -
Dec 12, 1991
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Expired
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Abstract
Rare earth pillared clays, and especially cerium and lanthanum aluminum chlorohydrite pillared clays, are quite effective catalysts in the alkylation of diaryl amines at temperatures in the range of 100.degree.-225.degree. C. The catalysts effect alkylation using olefins as the alkylating agent with high conversion and with minimal cracking of either the olefin or the alkylated product. Catalysts may be regenerated by heating in air at temperatures of at least about 550.degree.-600.degree. C. Water in small amounts also modifies the reaction to further reduce cracking although it also reduces the activity of the catalyst.
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