JPS5549336A - Preparation of 1, 2, 3, 4-butanetetracarboxylic acid - Google Patents
Preparation of 1, 2, 3, 4-butanetetracarboxylic acidInfo
- Publication number
- JPS5549336A JPS5549336A JP12144078A JP12144078A JPS5549336A JP S5549336 A JPS5549336 A JP S5549336A JP 12144078 A JP12144078 A JP 12144078A JP 12144078 A JP12144078 A JP 12144078A JP S5549336 A JPS5549336 A JP S5549336A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- containing gas
- crude
- oxidized
- anhydride
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title substance, a raw material for a polyimide of water- soluble varnished for coating electric wires, by oxidizing an oxidized tetrahydrophthalic acid (anhydride) with an oxygen-containing gas, and by recrystallizing the crude product from a specific solvent.
CONSTITUTION: Tetrahydrophthalic acid or its anhydride is oxidized with an ozone-containing gas in an organic solvent at 0W75°C, and then with a molecular exygen-containing gas, preferably air, at 90W120°C to give an oxidation product, which is heat-treated, preferably in the presence of a peroxide, to form crude 1, 2, 3, 4-butaneteracarboxylic acid. The crude acid is then recrystallized from a lower aliphatic carboxylic acid solvent, preferably acetic acid, or an acidic aqueous solution to form the title high-purity compound. Preferably, the aqueous solution has a pH ≤2, and is sulfuric or nitric acid.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12144078A JPS5549336A (en) | 1978-10-04 | 1978-10-04 | Preparation of 1, 2, 3, 4-butanetetracarboxylic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12144078A JPS5549336A (en) | 1978-10-04 | 1978-10-04 | Preparation of 1, 2, 3, 4-butanetetracarboxylic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5549336A true JPS5549336A (en) | 1980-04-09 |
Family
ID=14811181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12144078A Pending JPS5549336A (en) | 1978-10-04 | 1978-10-04 | Preparation of 1, 2, 3, 4-butanetetracarboxylic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5549336A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128350A (en) * | 1983-01-11 | 1984-07-24 | Daicel Chem Ind Ltd | Purification of 1,2,3,4-butanetetracarboxylic acid |
| WO2014005418A1 (en) * | 2012-07-02 | 2014-01-09 | 川渝中烟工业有限责任公司 | Cigarette paper additive having harm-reduction function and use thereof |
-
1978
- 1978-10-04 JP JP12144078A patent/JPS5549336A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128350A (en) * | 1983-01-11 | 1984-07-24 | Daicel Chem Ind Ltd | Purification of 1,2,3,4-butanetetracarboxylic acid |
| JPH0532380B2 (en) * | 1983-01-11 | 1993-05-14 | Daicel Chem | |
| WO2014005418A1 (en) * | 2012-07-02 | 2014-01-09 | 川渝中烟工业有限责任公司 | Cigarette paper additive having harm-reduction function and use thereof |
| US9675104B2 (en) | 2012-07-02 | 2017-06-13 | China Tobacco Sichuan Industrial Co., Ltd. | Cigarette paper additive having harm reduction function and application thereof |
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