Distillation: processes – separatory – With chemical reaction
Patent
1979-12-26
1981-07-14
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
With chemical reaction
203 48, 203 39, 62542, 562549, 562608, B01D 314, C07C 5144, C07C 5116
Patent
active
042785030
ABSTRACT:
Excessive energy consumption of a combination of multi-fractionations and multi-distillations of concentrating aqueous acetic acid product of liquid phase oxidations, especially oxidation of liquid n-butane with oxygen gas while the butane is dissolved in liquid acetic acid containing a catalyst system comprising Co-Br or Co-Mn-Br, is avoided and an otherwise hard to remove bromo-ketone is readily removed by a combination of sequential steps of decompressing the oxidation reaction mixture to remove unreacted butane as well as gaseous products, heat treating the decompressed liquid at a temperature of from 150.degree. C. up to 200.degree. C. for from 15 up to 150 minutes, subjecting the heat treated liquid to fractionation while recycling to the rectification zone thereof an aqueous portion of low boiling impurities as a means for concentrating the acetic acid and thereafter further concentrating the acetic acid produced by continuous fractional crystallization.
REFERENCES:
patent: RE23810 (1954-03-01), Schmidt
patent: 2823242 (1958-02-01), McKay
patent: 2884451 (1959-04-01), Graham
patent: 3293292 (1966-12-01), Olivier et al.
patent: 3350445 (1967-10-01), Binniag et al.
patent: 3561225 (1971-02-01), Hinton
patent: 3578706 (1971-05-01), List et al.
patent: 3616268 (1971-10-01), Phillou
patent: 4111986 (1978-09-01), Zimmerschied
Harper Jon J.
Zeitlin Martin A.
Ahlers Fred R.
Bascomb, Jr. Wilbur L.
Magidson William H.
McClain William T.
Standard Oil Company (Indiana)
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