Process for the preparation of acetic acid and acetic anhydride

Details Process for the preparation of acetic acid and acetic anhydride Process for the preparation of acetic acid and acetic anhydride

1994-05-02

1995-01-10

Prescott, Arthur C.

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

Organic compounds

Carboxylic acids and salts thereof

562890, 562891, C07C 5112

Patent

active

053809297

ABSTRACT:
To prepare acetic acid and acetic anhydride, methanol and methyl acetate are reacted under anhydrous conditions with carbon monoxide in the presence of a catalyst system containing carbonyl complexes of group VIII noble metals, methyl iodide, an alkali metal acetate or iodide, or quaternary organophosphonium or organoammonium acetate or iodide, The hot carbonylation mixture is decompressed, the evaporated components are fed to a first distillation zone, and the catalyst solution which remains is fed back to the reaction zone. In the first distillation zone, the volatile carbonylation products are subjected to fractional distillation; the low-boiling methyl iodide and methyl acetate pass back into the reaction zone, and the bottom product produced is a mixture of acetic acid and acetic anhydride, which is split into the pure components in a second distillation zone and a third distillation zone.

REFERENCES:
patent: 3772380 (1973-11-01), Paulik et al.
patent: 4046807 (1977-09-01), Kuckertz
patent: 4110359 (1978-08-01), Marion
patent: 4333884 (1982-06-01), Kubbeler et al.
patent: 4430273 (1984-02-01), Erpenbach et al.
patent: 4549937 (1985-10-01), Erpenbach et al.
patent: 4559183 (1985-12-01), Hewlett
patent: 4615806 (1986-10-01), Hilton
patent: 4664753 (1987-05-01), Erpenbach et al.

Affiliated with

Also associated with

Rating

Process for the preparation of acetic acid and acetic anhydride does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of acetic acid and acetic anhydride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of acetic acid and acetic anhydride will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-852275