GB823515A - Improvements in or relating to the production of terephthalic acid esters - Google Patents
Improvements in or relating to the production of terephthalic acid estersInfo
- Publication number
- GB823515A GB823515A GB11246/58A GB1124658A GB823515A GB 823515 A GB823515 A GB 823515A GB 11246/58 A GB11246/58 A GB 11246/58A GB 1124658 A GB1124658 A GB 1124658A GB 823515 A GB823515 A GB 823515A
- Authority
- GB
- United Kingdom
- Prior art keywords
- terephthalic acid
- relating
- production
- acid esters
- polyester
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention comprises a process for the recovery of dimethyl terephthalate ester from a polyester derived from terephthalic acid and a glycol, in which the polyester, preferably in a finely divided form, and terephthalic acid, particularly in the form of a crude oxidation product of methyl p-toluate and/or p-xylene, are heated under pressure with methanol. The proportion by weight of the polyester to the terephthalic acid may be between 0.1 and 95% An example is given. Specifications 727,989 and 809,730 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE823515X | 1957-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB823515A true GB823515A (en) | 1959-11-11 |
Family
ID=6746508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11246/58A Expired GB823515A (en) | 1957-05-29 | 1958-04-09 | Improvements in or relating to the production of terephthalic acid esters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB823515A (en) |
-
1958
- 1958-04-09 GB GB11246/58A patent/GB823515A/en not_active Expired
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