GB796377A - Manufacture of salts of terephthalic acid - Google Patents
Manufacture of salts of terephthalic acidInfo
- Publication number
- GB796377A GB796377A GB471556A GB471556A GB796377A GB 796377 A GB796377 A GB 796377A GB 471556 A GB471556 A GB 471556A GB 471556 A GB471556 A GB 471556A GB 796377 A GB796377 A GB 796377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- salt
- terephthalic acid
- salts
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/41—Preparation of salts of carboxylic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Alkali metal terephthalates are prepared by heating an alkali metal salt of pyromellitic acid to an elevated temperature in the presence of water. The preferred salt is the tetrapotassium salt although the sodium, lithium or rubidium salts may be used. The water may be formed in situ by, for example, treating the acid anhydride with the alkali metal bicarbonate. The reaction takes place in the presence of a heavy metal catalyst and the mixture is heated in the region of 425 DEG C. in an inert atmosphere such as carbon dioxide or nitrogen. The terephthalic acid may be obtained from the alkali metal salt by acidification with a mineral acid. An example describes the process using pyromellitic acid anhydride, and potassium bicarbonate with cadmium benzoate as catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB471556A GB796377A (en) | 1956-02-15 | 1956-02-15 | Manufacture of salts of terephthalic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB471556A GB796377A (en) | 1956-02-15 | 1956-02-15 | Manufacture of salts of terephthalic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB796377A true GB796377A (en) | 1958-06-11 |
Family
ID=9782428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB471556A Expired GB796377A (en) | 1956-02-15 | 1956-02-15 | Manufacture of salts of terephthalic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB796377A (en) |
-
1956
- 1956-02-15 GB GB471556A patent/GB796377A/en not_active Expired
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