GB823488A - Improvements in the production of terephthalic acid - Google Patents
Improvements in the production of terephthalic acidInfo
- Publication number
- GB823488A GB823488A GB36861/57A GB3686157A GB823488A GB 823488 A GB823488 A GB 823488A GB 36861/57 A GB36861/57 A GB 36861/57A GB 3686157 A GB3686157 A GB 3686157A GB 823488 A GB823488 A GB 823488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- terephthalic acid
- hydrolysis
- production
- terephthalate
- alkalis
- 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
- C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones
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)
Abstract
The invention comprises a process for the production of terephthalic acid by the hydrolysis of a polyalkylene terephthalate by means of water, which is substantially free from acids and alkalis and is at a temperature above 200 DEG C. At the conclusion of the hydrolysis the reaction mixture is cooled and the terephthalic acid separated, preferably at about 80 DEG C., e.g. by filtration. Prior to separation the reactants may be allowed to stand at about boiling temperature for some time. Examples are given of the hydrolysis of (1) polyethylene terephthalate, (2) polytetramethylene terephthalate, each containing some titanium dioxide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1166204T | 1957-02-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB823488A true GB823488A (en) | 1959-11-11 |
Family
ID=9654899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36861/57A Expired GB823488A (en) | 1957-02-08 | 1957-11-26 | Improvements in the production of terephthalic acid |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR1166204A (en) |
GB (1) | GB823488A (en) |
NL (2) | NL104017C (en) |
-
0
- NL NL221581D patent/NL221581A/xx unknown
- NL NL104017D patent/NL104017C/xx active
-
1957
- 1957-02-08 FR FR1166204D patent/FR1166204A/en not_active Expired
- 1957-11-26 GB GB36861/57A patent/GB823488A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL104017C (en) | |
NL221581A (en) | |
FR1166204A (en) | 1958-11-04 |
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