Preparation of acetic acid

Details Preparation of acetic acid Preparation of acetic acid

2008-03-18

2008-03-18

Witherspoon, Sikarl A. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

56, 56, 56, C568S492000

Reexamination Certificate

active

07345197

ABSTRACT:
A method for removing aldehyde impurities from acetic acid is disclosed. The method comprises extracting the aldehyde impurities from a methyl iodide solution such as the decanter heavy phase with a polyol. After the aldehyde impurities are removed, the methyl iodide heavy phase can be recycled to the carbonylation.

REFERENCES:
patent: 5620567 (1997-04-01), Seidel et al.
patent: 5817869 (1998-10-01), Hinnenkamp et al.
patent: 5932764 (1999-08-01), Morris et al.
patent: 6667418 (2003-12-01), Broussard et al.
patent: 7208625 (2007-04-01), Wang et al.

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