Recovery of acetic acid from dilute aqueous streams formed durin

Details Recovery of acetic acid from dilute aqueous streams formed durin Recovery of acetic acid from dilute aqueous streams formed durin

1995-04-07

1997-02-04

Nazario-Gonzalez, Porfirio

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5112

Patent

active

055999760

ABSTRACT:
A method is provided to improve the quality of recycle of certain residues by modifying the separation of alkanes and alkane-like materials and carbonyl-containing impurities from the recycle during the manufacture of acetic acid by the carbonylation of methanol. The improvement comprises partitioning the residues by the addition of water obtained from aqueous streams containing up to 50 wt. % acetic acid and which have been treated in a catalytic distillation unit to react the acetic acid with methanol to form recyclable methyl acetate and water and wherein the water is separated from the organics by distillation.

REFERENCES:
patent: 3278585 (1966-10-01), Baker et al.
patent: 4234719 (1980-11-01), Wan
patent: 4435595 (1984-03-01), Agreda et al.
patent: 5371286 (1994-12-01), Blay et al.

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