Chemtura Corporation

Lanxess Corporation

Huiyuan Chen

Robert G Rowland

Ronald Abbott

Mitchel Cohn

Alan B True

Kevin DiNicola

Cyril Migdal

Ronald D Abbott

Liquid alkylated N-phenyl-α-naphthylamine (PANA) compositions are disclosed containing a high concentration of mono-alkylated PANA and low levels of di-alkylated and less than 1% by weight of unsubstituted PANA. The novel compositions may be prepared by controlled alkylation of PANA with propylene oligomers followed by subsequent alkylation with at least one second olefin.

Liquid mono-alkylated N-phenyl-α-naphthylamine compositions and methods of manufacturing the same

Aromatic amines, for example, diarylamines such as diphenylamine, dinaphthylamine, N-phenyl-N-naphthyl amine etc., are alkylated by passing a mixture of the amine and an olefin, though a clay catalyst in a fixed bed reactor system. The process is conveniently run as a continued process, produces an alkylated aromatic amine in excellent purity and provides efficiencies in material and energy use.

Fixed bed process for clay catalyzed alkylation of aromatic amines

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Cheshire, CT, United States of America

Huiyuan Chen