Recovery of para-nitrosodium phenolate

Details Recovery of para-nitrosodium phenolate Recovery of para-nitrosodium phenolate

1978-10-27

1980-07-29

Lone, Werren B.

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

Organic compounds

Oxygen containing

568708, C07C 7926

Patent

active

042152275

ABSTRACT:
A process for preparing alkali metal salts of para-nitrophenol by contacting para-chloronitrobenzene with an aqueous solution of (1) aqueous caustic and (2) recycled filtrate and washing solution from the preparation of para-nitrophenol containing 5-20% by weight of said alkali metal salts at a temperature of from 180.degree.-250.degree. C. and at autogenous pressure in 30 seconds to 10 minutes with the mole ratio of caustic to chloronitrobenzene of from 2:1-4:1, caustic concentration in the aqueous solution of from 5-20%, the amount of recycle ranging from 5-45% by weight based on the aqueous solution.

REFERENCES:
patent: 2275045 (1942-03-01), Gebe
patent: 2407045 (1946-09-01), Tyrer
patent: 2743301 (1956-04-01), Melucci
patent: 3280407 (1966-11-01), Cox
patent: 3506724 (1970-04-01), Tuemmler et al.
patent: 3624164 (1971-11-01), Georgiou
patent: 3708545 (1973-01-01), Squire
patent: 3804907 (1974-04-01), Kablaoui
Korenman et al., "Journal of Applied Chemistry", 50 No. 9, pp. 1969-1971, Sep. 1977.
"Russian Journal of Physical Chemistry" 45, (4), 1971.

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