Appeal No. 96-2425
Application 08/094,933
THE INVENTION
Appellants’ claimed invention is directed toward a
process for preparing a reaction product containing methylene
diphenylamine. Appellants react aniline and formaldehyde in
the presence of an acid catalyst, and reduce the acid level of
the reaction mixture during digestion of the reaction
mixture. Appellants also claim the product made by the2
process. Claims 1 and 9 are illustrative and read as follows:
1. A process for preparing a reaction product
containing methylene diphenylamine, comprising reacting
aniline and formaldehyde in the presence of catalyst;
reducing the acid level of the resulting reaction mixture
during digestion of the reaction mixture, and followed by
completely neutralizing the reaction product after digestion.
9. A reaction product comprising methylene
diphenylamine which is prepared by the process of claim 1.
THE REFERENCE
Bolton et al. (Bolton) 5,286,760 Feb. 15, 1994
(filed Oct. 9,
2Appellants state that “[b]y the term ‘digestion’ is
meant the stage at which the intermediate aminobenzylamines
rearrange to form methylene diphenylamines and polymethylene
polyphenylamine” (specification, page 4, lines 19-22).
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