Process for the preparation of para-nitroso-...

Details Process for the preparation of para-nitroso-... Process for the preparation of para-nitroso-...

B - Operations, Transporting

01

J

260/473.5, 260/5

B01J 31/02 (2006.01)

Patent

CA 1106854

ABSTRACT OF THE DISCLOSURE An improved process for the preparation of para-nitroso-diphenylhydroxylamines is disclosed. One member of the group consisting of nitrosobenzene, ortho-substituted nitrosobenzenes, meta-substituted nitrosobenzenes, ortho-meta- disubstituted nitrosobenzenes and para-substituted nitroso- benzenes is reacted with one member selected from the group consisting of nitrosobenzenes ortho-substituted nitrosobenzenes, meta-substituted nitrobenzenes, and ortho-meta-disubstituted nitrosobenzenes, in the presence of an acid catalyst. The improvement comprises utilizing as the acid catalyst an acid selected from the group consisting of aliphatic, cycloaliphatic, and aromatic sulfonic acids, having a pKa equal to or less than one, perchloric acid, and trifluoroacetic acid, in an amount equal to or greater than 0.5 mol of acid per mol o{ nitroso reactants, and performing the reaction at a temperature from about -20°C to about 60°C.

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