JPS567738A - Recovery of acetic acid - Google Patents
Recovery of acetic acidInfo
- Publication number
- JPS567738A JPS567738A JP8211079A JP8211079A JPS567738A JP S567738 A JPS567738 A JP S567738A JP 8211079 A JP8211079 A JP 8211079A JP 8211079 A JP8211079 A JP 8211079A JP S567738 A JPS567738 A JP S567738A
- Authority
- JP
- Japan
- Prior art keywords
- acetic acid
- crotonaldehyde
- vinyl acetate
- distillation
- acetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To recover acetic acid in one stage with low energy, by separation of crotonic acid resulting from oxidation of crotonaldehyde in by-provucts of the vinyl acetate production stage through distillation, and they by azeotropic distillation of acetic anhydrde with aqueous acetic acid.
CONSTITUTION: The by-product solution which is obtained after the elimination of vinyl acetate in the vinyl acetate production stage and contains acetic anhydride, crotonaldehyde and other high-boiling substances is fed to an oxidation reactor to oxidize the crotonaldehyde into crotonic acid, which is removed by distillation. The resulting acetic anhydride is then fed to an azeotropic distillation column with aqueous acetic acid to prepare acetic acid. The crotonaldehyde may be oxidized with an oxidizing agent, e.g. potasiium permanganate or dichromate, or with air or oxygen in the presence of copper acetate or a silver compound, etc. as a catalyst.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8211079A JPS567738A (en) | 1979-06-29 | 1979-06-29 | Recovery of acetic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8211079A JPS567738A (en) | 1979-06-29 | 1979-06-29 | Recovery of acetic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS567738A true JPS567738A (en) | 1981-01-27 |
JPS6116259B2 JPS6116259B2 (en) | 1986-04-28 |
Family
ID=13765256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8211079A Granted JPS567738A (en) | 1979-06-29 | 1979-06-29 | Recovery of acetic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS567738A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007277200A (en) * | 2006-04-11 | 2007-10-25 | Mitsubishi Rayon Co Ltd | METHOD FOR PRODUCING alpha,beta-UNSATURATED CARBOXYLIC ACID |
-
1979
- 1979-06-29 JP JP8211079A patent/JPS567738A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007277200A (en) * | 2006-04-11 | 2007-10-25 | Mitsubishi Rayon Co Ltd | METHOD FOR PRODUCING alpha,beta-UNSATURATED CARBOXYLIC ACID |
Also Published As
Publication number | Publication date |
---|---|
JPS6116259B2 (en) | 1986-04-28 |
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