GB798442A - Manufacture of salts of terephthalic acid - Google Patents
Manufacture of salts of terephthalic acidInfo
- Publication number
- GB798442A GB798442A GB498156A GB498156A GB798442A GB 798442 A GB798442 A GB 798442A GB 498156 A GB498156 A GB 498156A GB 498156 A GB498156 A GB 498156A GB 798442 A GB798442 A GB 798442A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- terephthalic acid
- salts
- specified
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
- C07C51/38—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups by decarboxylation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Abstract
Alkali metal salts of terephthalic acid are prepared by heating an alkali metal salt of pyromellitic acid to an elevated temperature in an inert atmosphere and in the presence of an alkali metal salt of benzoic acid. Specified alkali metal salts are those of sodium, lithium, rubidium or, preferably potassium. The alkali metal salts may be preformed or may be formed in situ, for example from pyromellitic anhydride, benzoic anhydride and an alkali metal carbonate. A metal catalyst may be used, the preferred one being cadmium benzoate. Specified reaction temperatures are above 300 DEG C., and preferably about 425 DEG C. Specified inert gases are carbon dioxide and nitrogen. Terephthalic acid may be obtained from the salts by known methods. In examples, pyromellitic anhydride, benzoic anhydride, potassium, sodium or lithium carbonate and cadmium benzoate were heated in a sealed vessel in an atmosphere of carbon dioxide, the reaction mixture extracted with water, filtered and the filtrate acidified to give terephthalic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB498156A GB798442A (en) | 1956-02-17 | 1956-02-17 | Manufacture of salts of terephthalic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB498156A GB798442A (en) | 1956-02-17 | 1956-02-17 | Manufacture of salts of terephthalic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB798442A true GB798442A (en) | 1958-07-23 |
Family
ID=9787498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB498156A Expired GB798442A (en) | 1956-02-17 | 1956-02-17 | Manufacture of salts of terephthalic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB798442A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3096366A (en) * | 1957-10-07 | 1963-07-02 | Henkel & Cie Gmbh | Preparation of terephthalic acid by carboxylation reactions |
| US5068409A (en) * | 1989-09-08 | 1991-11-26 | Bromine Compounds Ltd. | Bis(4-halo-phthalic acid) quarter salt, process for their preparation and their use |
-
1956
- 1956-02-17 GB GB498156A patent/GB798442A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3096366A (en) * | 1957-10-07 | 1963-07-02 | Henkel & Cie Gmbh | Preparation of terephthalic acid by carboxylation reactions |
| US5068409A (en) * | 1989-09-08 | 1991-11-26 | Bromine Compounds Ltd. | Bis(4-halo-phthalic acid) quarter salt, process for their preparation and their use |
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