Purification of 1,4-butanediol

Details Purification of 1,4-butanediol Purification of 1,4-butanediol

1975-08-08

1977-06-28

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260635D, C07C 2924

Patent

active

040325830

ABSTRACT:
An improved process is disclosed for recovering 1,4-butanediol in high purity from a mixture comprising 1,4-butanediol in admixture with minor amounts of certain impurities which comprises diluting the 1,4-butanediol-containing mixture with water to form an aqueous mixture having from about 5 to about 75 wt. % water and contacting said aqueous mixture in an extraction zone with a hydrocarbon extractant. An aqueous 1,4-butanediol-containing raffinate is obtained as the bottoms product of the extraction zone and is introduced into a distillation zone operated at reduced pressure from which substantially pure 1,4-butanediol is recovered.

REFERENCES:
patent: 3088982 (1963-05-01), Feldman et al.
patent: 3705925 (1972-12-01), Starks et al.
patent: 3898291 (1975-08-01), Darsi et al.
patent: 3917720 (1975-11-01), Webb et al.
Large "Handbook of Chemistry," 10th Ed., (1961), pp. 508 and 509.

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