GB1196500A - Production of Tetrahydrofuran-2,3,4,5-Tetracarboxylic Acid Dianhydride - Google Patents
Production of Tetrahydrofuran-2,3,4,5-Tetracarboxylic Acid DianhydrideInfo
- Publication number
- GB1196500A GB1196500A GB6009968A GB6009968A GB1196500A GB 1196500 A GB1196500 A GB 1196500A GB 6009968 A GB6009968 A GB 6009968A GB 6009968 A GB6009968 A GB 6009968A GB 1196500 A GB1196500 A GB 1196500A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tetrahydrofuran
- production
- tetracarboxylic acid
- acid dianhydride
- acid
- 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.)
- Expired
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
1,196,500. Tetrahydrofuran - 2,3,4,5 - tetracarboxylic dianhydride. GELSENBERG BENZIN A.G. 18 Dec., 1968 [22 Dec., 1967], No. 60099/68. Addition to 1,178,668. Heading C2C. The novel compound tetrahydrofuran-2,3,4,5- tetracarboxylic dianhydride of the formula is obtained by dehydration of the corresponding acid (tetrahydrofuran - 2,3,4,5 - tetracarboxylic acid) by treatment with acetic anhydride at elevated temperature, optionally in the presence of an inert solvent, e.g. an aromatic hydrocarbon. It is preferred to use more than 2 mols of the anhydride per mol of the acid.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG0050576 | 1967-07-07 | ||
DE1643407 | 1967-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1196500A true GB1196500A (en) | 1970-06-24 |
Family
ID=35149008
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3223368A Expired GB1178648A (en) | 1967-07-07 | 1968-07-08 | Process for the Production of Tetrahydrofuran Tetracarboxylic Acid |
GB6009968A Expired GB1196500A (en) | 1967-07-07 | 1968-12-18 | Production of Tetrahydrofuran-2,3,4,5-Tetracarboxylic Acid Dianhydride |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3223368A Expired GB1178648A (en) | 1967-07-07 | 1968-07-08 | Process for the Production of Tetrahydrofuran Tetracarboxylic Acid |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB1178648A (en) |
-
1968
- 1968-07-08 GB GB3223368A patent/GB1178648A/en not_active Expired
- 1968-12-18 GB GB6009968A patent/GB1196500A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1178648A (en) | 1970-01-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |