JPS56110642A - Separating and purifying method of methacrylic acid - Google Patents
Separating and purifying method of methacrylic acidInfo
- Publication number
- JPS56110642A JPS56110642A JP1155780A JP1155780A JPS56110642A JP S56110642 A JPS56110642 A JP S56110642A JP 1155780 A JP1155780 A JP 1155780A JP 1155780 A JP1155780 A JP 1155780A JP S56110642 A JPS56110642 A JP S56110642A
- Authority
- JP
- Japan
- Prior art keywords
- acetic acid
- tower
- extracting
- methacrylic acid
- fed
- 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.)
- Pending
Links
Abstract
PURPOSE: To obtain methacrylic acid, by the extraction of an aqueous methacrylic acid containing acetic acid with ethylbenzene and/or xylene, and the elimination of a small amount of acetic acid and water contained through the azeotrope with the extracting solvent mentioned above while recycling the distillate.
CONSTITUTION: An aqueous methacrylic acid containing acetic acid prepared through the oxidation of isobutylene, t-butanol, etc., is fed from a tube 1 to an extracting tower 2, and an extracting solvent, e.g. ethylbenzene and/or xylene, containing a small amount of acetic acid, is fed from a tube 10. The organic layer containing methacrylic acid, the extracting solvent and a very small amount of acetic acid, is fed from the top of the tower 2 through a tube 3 to an acetic acid removing tower 5 and distilled by the vacuum distillation to distill off a part of the solvent, acetic acid and water from the top of the tower 5. The resultant distillate is refluxed partly. The remaining distillate and the solvent recovered from the latter stage are fed into a tank 9, and recycled from the tube 10 to the extracting tower 2. Water containing acetic acid is obtained from the bottom of the extracting tower 2.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1155780A JPS56110642A (en) | 1980-02-04 | 1980-02-04 | Separating and purifying method of methacrylic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1155780A JPS56110642A (en) | 1980-02-04 | 1980-02-04 | Separating and purifying method of methacrylic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56110642A true JPS56110642A (en) | 1981-09-01 |
Family
ID=11781234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1155780A Pending JPS56110642A (en) | 1980-02-04 | 1980-02-04 | Separating and purifying method of methacrylic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56110642A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554054A (en) * | 1983-12-09 | 1985-11-19 | Rohm And Haas Company | Methacrylic acid separation |
| JP2002179618A (en) * | 2000-12-12 | 2002-06-26 | Mitsubishi Gas Chem Co Inc | Method for purifying methacrylic acid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS497215A (en) * | 1972-05-24 | 1974-01-22 |
-
1980
- 1980-02-04 JP JP1155780A patent/JPS56110642A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS497215A (en) * | 1972-05-24 | 1974-01-22 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554054A (en) * | 1983-12-09 | 1985-11-19 | Rohm And Haas Company | Methacrylic acid separation |
| JP2002179618A (en) * | 2000-12-12 | 2002-06-26 | Mitsubishi Gas Chem Co Inc | Method for purifying methacrylic acid |
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