GB927426A - A process for the decondensation of polyethylene terephthalate to dimethyl terephthalate - Google Patents
A process for the decondensation of polyethylene terephthalate to dimethyl terephthalateInfo
- Publication number
- GB927426A GB927426A GB109362A GB109362A GB927426A GB 927426 A GB927426 A GB 927426A GB 109362 A GB109362 A GB 109362A GB 109362 A GB109362 A GB 109362A GB 927426 A GB927426 A GB 927426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyethylene terephthalate
- terephthalate
- decondensation
- dimethyl
- pressure
- 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
- 229920000139 polyethylene terephthalate Polymers 0.000 title abstract 4
- 239000005020 polyethylene terephthalate Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 3
- 239000007795 chemical reaction product Substances 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005194 fractionation Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyesters Or Polycarbonates (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
A process for decondensation of polyethylene terephthalate to dimethyl terephthalate comprises treating a polyethylene terephthalate with superheated steam, mixing the treated polyethylene terephthalate in finely divided form with excess methanol, reacting the resulting mixture at a temperature of from 280 DEG C. to 340 DEG C. and at a pressure of from 80 to 140 atm., releasing the pressure, freeing the reaction products from entrained substances in solid and/or vapour form and cooling the reaction products with fractionation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEV19978A DE1131202B (en) | 1961-01-12 | 1961-01-12 | Process for the degradation of polyethylene terephthalate to dimethyl terephthalate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB927426A true GB927426A (en) | 1963-05-29 |
Family
ID=7578216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB109362A Expired GB927426A (en) | 1961-01-12 | 1962-01-11 | A process for the decondensation of polyethylene terephthalate to dimethyl terephthalate |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE611412A (en) |
| CH (1) | CH407085A (en) |
| DE (1) | DE1131202B (en) |
| GB (1) | GB927426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353904A (en) * | 2022-08-02 | 2022-11-18 | 中国矿业大学 | Method and device for efficiently liquefying plastic garbage to prepare oil by superheated steam system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE635706A (en) * | 1962-08-17 | |||
| US4045392A (en) * | 1975-03-11 | 1977-08-30 | E. I. Du Pont De Nemours And Company | Alkyd resin manufacturing process by using water or steam to reverse or retard gelation |
-
1961
- 1961-01-12 DE DEV19978A patent/DE1131202B/en active Pending
- 1961-12-12 BE BE611412A patent/BE611412A/en unknown
- 1961-12-18 CH CH1465761A patent/CH407085A/en unknown
-
1962
- 1962-01-11 GB GB109362A patent/GB927426A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353904A (en) * | 2022-08-02 | 2022-11-18 | 中国矿业大学 | Method and device for efficiently liquefying plastic garbage to prepare oil by superheated steam system |
| CN115353904B (en) * | 2022-08-02 | 2024-02-23 | 中国矿业大学 | Method and device for preparing oil by efficiently liquefying plastic garbage through superheated steam system |
Also Published As
| Publication number | Publication date |
|---|---|
| BE611412A (en) | 1962-03-30 |
| CH407085A (en) | 1966-02-15 |
| DE1131202B (en) | 1962-06-14 |
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