Preparation of p-nitrophenolic compounds

Details Preparation of p-nitrophenolic compounds Preparation of p-nitrophenolic compounds

1994-05-26

1995-05-09

Lone, Werren B.

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

Organic compounds

Oxygen containing

568650, 568705, 568709, C07C20520, C07C20521, C07C20526

Patent

active

054141486

ABSTRACT:
p-Nitrophenolic compounds, e.g., p-nitrophenol itself, are selectively prepared by (a) reacting a phenolic compound with a nitrosating agent in the presence of sulfuric acid, the concentration of which H.sub.2 SO.sub.4 being at least 60%, (b) oxidizing the p-nitrosophenolic compound thus formed with nitric acid, the concentration of sulfuric acid in the medium of reaction, upon completion of oxidation, being no greater than 80%, and (c) separating the p-nitrophenolic compound which thus precipitates.

REFERENCES:
patent: 1502849 (1924-07-01), Ehrlich
patent: 3320324 (1967-05-01), Kouba
patent: 3510527 (1970-05-01), Prosser
patent: 3517075 (1970-06-01), Callister

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