Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1982-08-30
1984-12-04
Helfin, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568650, C07C 4138
Patent
active
044866119
ABSTRACT:
A process for the isolation of a dihydroxybenzene-monoether from a reaction mixture containing solvent, ether and unreacted dihydroxybenzene, comprising contacting the reaction mixture with at least one hydrocarbon which is not miscible or only partially miscible with the reaction mixture, the ether selectively entering the hydrocarbon. Advantageously the reaction for the preparation of the monoether is carried out in an alcohol, a ketone, a dipolar aprotic solvent or a polyhydroxyalkyl ether, or a mixture thereof with water, the hydrocarbon used as extracting agent has a boiling point between about 80.degree. and 300.degree. C., and the extraction is carried out in the presence of water whereby there is an increase in the selectivity of the extraction.
REFERENCES:
patent: 3274260 (1966-09-01), Levy et al.
patent: 3374276 (1968-03-01), Swidinsky
patent: 3441616 (1969-04-01), Pizzini et al.
patent: 3689570 (1972-09-01), Gradeff et al.
patent: 4025566 (1977-05-01), Nagai et al.
Chemical Abstracts, vol. 79, No. 19, 11/12/1973, p. 232.
Chemical Abstracts, vol. 84, 25, 1976, p. 469.
Allenbach Udo
Buttner Gerhard
Christmann Karl-Friedrich
Lenthe Manfred
Bayer Aktiengesellschaft
Helfin Bernard
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