Process for producing acetic acid

Details Process for producing acetic acid Process for producing acetic acid

2007-04-24

2007-04-24

Page, Thurman K. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S519000

Reexamination Certificate

active

10708423

ABSTRACT:
An improved process is disclosed for producing acetic acid, including the following steps: reacting a carbonylatable reactant such as methanol, methyl acetate, methyl formate or dimethyl ether with carbon monoxide in a reaction medium containing water, methyl iodide, and a catalyst to produce a reaction product that contains acetic acid; separating the reaction product to provide a volatile phase containing acetic acid, water, and methyl iodide and a less volatile phase; distilling the volatile phase to produce a purified acetic acid product and a first overhead containing water, methyl acetate, and methyl iodide; phase separating the first overhead to provide a first liquid phase containing water and a second liquid phase containing methyl iodide; and adding dimethyl ether to the process in an amount effective to enhance separation of the first overhead to form the first and second liquid phases.

REFERENCES:
patent: 3769329 (1973-10-01), Paulik et al.
patent: 4629711 (1986-12-01), Erpenbach et al.
patent: 5001259 (1991-03-01), Smith et al.
patent: 5026908 (1991-06-01), Smith et al.
patent: 5144068 (1992-09-01), Smith et al.
patent: 5371286 (1994-12-01), Blay et al.
patent: 5416237 (1995-05-01), Aubigne et al.
patent: 5625095 (1997-04-01), Miura et al.
patent: 5723660 (1998-03-01), Morimoto et al.
patent: 5756836 (1998-05-01), Shimizu et al.
patent: 5783731 (1998-07-01), Fisher et al.
patent: 5831120 (1998-11-01), Watson et al.
patent: 6143930 (2000-11-01), Singh et al.
patent: 6339171 (2002-01-01), Singh et al.
patent: 1 061 874 (1985-02-01), None
patent: 9-40590 (1997-02-01), None
patent: 09-235250 (1997-09-01), None
Derrick J. Watson,The Cativa Process for the Production of Acetic Acid, inCatalysis of Organic Reactions, vol. 75, pp. 369-380 (1998).
R.T. Eby & T.C. Singleton,Methanol Carbonylation to Acetic Acid, inApplied Industrial Catalysis, vol. 1, pp. 275-296 (1983).

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