Process for the synthesis of mixtures of methane diphenyl...

Details Process for the synthesis of mixtures of methane diphenyl... Process for the synthesis of mixtures of methane diphenyl...

2006-09-12

2006-09-12

Davis, Brian (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S332000

Reexamination Certificate

active

07105700

ABSTRACT:
A process for preparing methane diphenyl diamine (MDA) or a mixture of methane diphenyl diamine (MDA) and its higher homologues with a controlled isomer distribution using a modified zeolite having “shape selectivity”. The mixture contains compounds having the following general formula (I): where R represents a hydrogen atom or a C1 to C8 (iso)alkyl group, a C4 to C10 cycloalkyl group or a C6 to C12 aromatic group and n is a whole number greater than or equal to one so as to give a functionality of 2 to 6.

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