GB828313A - Improvements in the manufacture of terephthalic acid - Google Patents
Improvements in the manufacture of terephthalic acidInfo
- Publication number
- GB828313A GB828313A GB1939856A GB1939856A GB828313A GB 828313 A GB828313 A GB 828313A GB 1939856 A GB1939856 A GB 1939856A GB 1939856 A GB1939856 A GB 1939856A GB 828313 A GB828313 A GB 828313A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potassium
- reaction
- terephthalic acid
- carried out
- atmospheres
- 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)
Abstract
Terephthalic acid in the form of a potassium salt is prepared by heating potassium trimellitate in a non-oxidizing atmosphere to a temperature above 250 DEG C. The potassium terephthalate is converted to the acid by known methods. Specified non-oxidizing atmospheres are nitroen and carbon dioxide. The reaction is preferably carried out at a pressure of at least 15 atmospheres. The reaction may be carried out in the presence of heat transfer assistants such as sand and carborundum powder and/or isomerization catalysts such as iron, zinc, titanium, lead and mercury and oxides thereof. Up to 20% of water may be present during the reaction. The Provisional Specification mentions the use as starting material of a mixture of potassium trimellitate and potassium benzoate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1939856A GB828313A (en) | 1956-06-22 | 1956-06-22 | Improvements in the manufacture of terephthalic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1939856A GB828313A (en) | 1956-06-22 | 1956-06-22 | Improvements in the manufacture of terephthalic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB828313A true GB828313A (en) | 1960-02-17 |
Family
ID=10128692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1939856A Expired GB828313A (en) | 1956-06-22 | 1956-06-22 | Improvements in the manufacture of terephthalic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB828313A (en) |
-
1956
- 1956-06-22 GB GB1939856A patent/GB828313A/en not_active Expired
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