Title:
アセトン、酢酸メチルおよびヨウ化メチルを含む流れからのアセトンの除去方法
Document Type and Number:
Japanese Patent JP2012514591
Kind Code:
A
Abstract:
The present invention relates to a separation process for removing acetone from a mixture comprising acetone, methyl acetate, methyl iodide and acetic acid, and in particular to a process for the removal of acetone from a stream comprising acetone, methyl acetate and methyl iodide, which stream has been obtained from a production system in which a mixture comprising methanol, methyl acetate and water is carbonylated to produce acetic anhydride and acetic acid, and said process comprising the steps of:
(a) introducing said stream comprising acetone, methyl acetate and methyl iodide into a first distillation zone;
(b) introducing acetic acid into said first distillation zone, either by addition of acetic acid to said stream comprising acetone, methyl acetate and methyl iodide or by introduction of acetic acid directly to the first distillation zone at one or more points at or above the point of introduction of said stream comprising acetone, methyl acetate and methyl iodide into the first distillation zone in step (a), or a combination of both;
(c) removing from the first distillation zone an overhead stream comprising methyl iodide and a bottoms stream comprising acetone, methyl acetate, acetic acid, and a reduced amount of methyl iodide;
(d) introducing into a second distillation zone the bottoms stream from step (c);
(e) removing from the second distillation zone an overhead stream comprising methyl acetate and methyl iodide and a bottoms stream comprising acetone, methyl acetate and acetic acid;
(f) introducing the bottoms stream from step (e) into a third distillation zone; and
(g) removing from the third distillation zone an overhead stream comprising methyl acetate and acetone and a bottoms stream comprising methyl acetate and acetic acid.
Inventors:
Henigan, Shawn Anthony
Jeffers, David Edward George
Sellers, Martin John
Smith, Stephen James
Wilson, Peter John
Jeffers, David Edward George
Sellers, Martin John
Smith, Stephen James
Wilson, Peter John
Application Number:
JP2011544078A
Publication Date:
June 28, 2012
Filing Date:
December 23, 2009
Export Citation:
Assignee:
BP CHEMICALS LIMITED
International Classes:
C07C45/82; C07C49/08; C07C51/235; C07C51/44; C07C53/08
Domestic Patent References:
| JPH01135732A | 1989-05-29 | |||
| JPH07324055A | 1995-12-12 | |||
| JPS5857329A | 1983-04-05 | |||
| JPS6156144A | 1986-03-20 |
Attorney, Agent or Firm:
Haruo Hamada
Park Park
Nishiguchi Katsu
Akatsu Teiji
Ryoko Saito
Park Park
Nishiguchi Katsu
Akatsu Teiji
Ryoko Saito