GB806269A - Process for the conversion of polyethylene terephthalate into dimethyl terephthalate - Google Patents
Process for the conversion of polyethylene terephthalate into dimethyl terephthalateInfo
- Publication number
- GB806269A GB806269A GB22567/56A GB2256756A GB806269A GB 806269 A GB806269 A GB 806269A GB 22567/56 A GB22567/56 A GB 22567/56A GB 2256756 A GB2256756 A GB 2256756A GB 806269 A GB806269 A GB 806269A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphonic acid
- acid
- terephthalate
- naphthalene
- conversion
- 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
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 title abstract 4
- -1 polyethylene terephthalate Polymers 0.000 title abstract 4
- 238000006243 chemical reaction Methods 0.000 title abstract 3
- 229920000139 polyethylene terephthalate Polymers 0.000 title abstract 2
- 239000005020 polyethylene terephthalate Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 title 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 2
- 150000007513 acids Chemical class 0.000 abstract 2
- WODGMMJHSAKKNF-UHFFFAOYSA-N 2-methylnaphthalene-1-sulfonic acid Chemical compound C1=CC=CC2=C(S(O)(=O)=O)C(C)=CC=C21 WODGMMJHSAKKNF-UHFFFAOYSA-N 0.000 abstract 1
- ILFFFKFZHRGICY-UHFFFAOYSA-N anthracene-1-sulfonic acid Chemical compound C1=CC=C2C=C3C(S(=O)(=O)O)=CC=CC3=CC2=C1 ILFFFKFZHRGICY-UHFFFAOYSA-N 0.000 abstract 1
- 125000003118 aryl group Chemical group 0.000 abstract 1
- MIAUJDCQDVWHEV-UHFFFAOYSA-N benzene-1,2-disulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1S(O)(=O)=O MIAUJDCQDVWHEV-UHFFFAOYSA-N 0.000 abstract 1
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 abstract 1
- YZMHQCWXYHARLS-UHFFFAOYSA-N naphthalene-1,2-disulfonic acid Chemical compound C1=CC=CC2=C(S(O)(=O)=O)C(S(=O)(=O)O)=CC=C21 YZMHQCWXYHARLS-UHFFFAOYSA-N 0.000 abstract 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 abstract 1
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
Dimethyl terephthalate is prepared by the reaction of polyethylene terephthalate with methanol in the presence of an aryl sulphonic acid. Suitable aryl sulphonic acids are benzene sulphonic acid, benzene disulphonic acid, naphthalene sulphonic acid, naphthalene disulphonic acid, toluyl sulphonic acid, anthracene sulphonic acid and methyl naphthalene sulphonic acid. The acids are preferably present in up to 5 per cent by weight of the polycondensate. The reaction may be carried out at 20-35 atm. gauge pressure, at temperatures up to 200 DEG C., or at atmospheric pressure at temperatures up to 300 DEG C. Examples are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE806269X | 1955-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB806269A true GB806269A (en) | 1958-12-23 |
Family
ID=6722564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22567/56A Expired GB806269A (en) | 1955-08-05 | 1956-07-20 | Process for the conversion of polyethylene terephthalate into dimethyl terephthalate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB806269A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3488298A (en) * | 1966-12-01 | 1970-01-06 | Eastman Kodak Co | Polyester scrap recovery processes |
| LU102949B1 (en) | 2022-05-03 | 2023-11-06 | Univ Hamburg | Method for the depolymerization of a terephthalate polyester |
-
1956
- 1956-07-20 GB GB22567/56A patent/GB806269A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3488298A (en) * | 1966-12-01 | 1970-01-06 | Eastman Kodak Co | Polyester scrap recovery processes |
| LU102949B1 (en) | 2022-05-03 | 2023-11-06 | Univ Hamburg | Method for the depolymerization of a terephthalate polyester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB921066A (en) | Process for making alkyl-1, 1-dimethylindans | |
| GB823824A (en) | Process for the preparation of mercaptans | |
| GB644707A (en) | Improvements in or relating to the production of terephthalic acid | |
| GB806269A (en) | Process for the conversion of polyethylene terephthalate into dimethyl terephthalate | |
| GB824917A (en) | Propylene dimerization | |
| GB956115A (en) | Improvements in or relating to a process for the preparation of organic peroxides | |
| GB800160A (en) | Process of producing anhydrous zirconium salts of organic monocarboxylic acids | |
| GB925812A (en) | Novel ester of hydroxymethylfurfural and process for its preparation | |
| GB911522A (en) | Preparation of aluminium trialkoxide compounds | |
| GB806934A (en) | Process for the polycondensation of diglycol terephthalate | |
| GB723454A (en) | Improvements in or relating to the manufacture of hydroquinone | |
| GB896803A (en) | Process for the manufacture of water-insoluble quinacridones free from sulphonic acid groups | |
| GB951663A (en) | Process for the preparation of 6-deoxy-6-demethyl-6-methylene-5-oxytetracycline | |
| GB828658A (en) | Production of ethyl acrylate | |
| GB800171A (en) | Process for the production of choline theophyllinate | |
| GB798846A (en) | N-picolinoyl-phthalic acid hydrazide | |
| GB804456A (en) | ª‡-methyl-ª‡-phenylsuccinodinitrile and a process for producing n-methyl-ª‡-phenyl-ª‡-methylsuccinimide | |
| GB957979A (en) | Esters | |
| GB975466A (en) | Process for the production of 2,5-diarylamino-terephthalic acids | |
| GB763182A (en) | Improvements in or relating to preparation of m- and p-diisopropylbenzene | |
| GB882854A (en) | Process for producing monobromacetric acid and derivatives thereof | |
| GB966835A (en) | The preparation of 1,4-cyclohexadiene-1,4-dicarboxylic acid | |
| GB859850A (en) | Improvements in the production of 1-phenylcyclohexane-1-hydroperoxide | |
| GB848395A (en) | Improvements in the production of esters of propionylacrylic acid | |
| GB876960A (en) | Process for the manufacture of isoprene from 4.4-dimethylmetadioxane |