ES273029A1 - A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
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.)
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Glanzstoff AG
Vereinigte Glanzstoff Fabriken AG
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Glanzstoff AG
Vereinigte Glanzstoff Fabriken AG
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Application filed by Glanzstoff AG, Vereinigte Glanzstoff Fabriken AGfiledCriticalGlanzstoff AG
Priority to ES0273029ApriorityCriticalpatent/ES273029A1/en
Publication of ES273029A1publicationCriticalpatent/ES273029A1/en
Separation, Recovery Or Treatment Of Waste Materials Containing Plastics
(AREA)
Compositions Of Macromolecular Compounds
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Treatments Of Macromolecular Shaped Articles
(AREA)
Abstract
A process for decondensing polyethylene terephthalate to terephthalic acid dimethyl ester, characterized in that the polyethylene terephthalate is subjected to a treatment with superheated steam, after which, and in finely divided form, it is mixed with excess methanol. preferably a 2.5 to 5 times higher weight amount based on polyethylene terephthalate, the mixture is reacted at a temperature of 280 to 340º C, preferably 300 to 320º C, and to overpressures of 80 to 140 atmospheres, preferably 100 to 120 atmospheres-, the reaction products expand, possibly with the addition of heat, and after separating the solid or cloudy components, they are cooled fractionally. (Machine-translation by Google Translate, not legally binding)
ES0273029A1961-12-181961-12-18A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
ExpiredES273029A1
(en)
A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
A procedure for discondenating polyethyl tereftalate to dimethyl ester of thereftal acid (Machine-translation by Google Translate, not legally binding)
A procedure for the pressure-free degradation of polyethylene tereftalate or dimethyl terrethalate (Machine-translation by Google Translate, not legally binding)
A procedure for the polycondensation of reaction products of dimethyl tereftalate and etilenoglycol (Machine-translation by Google Translate, not legally binding)
A procedure for obtaining a white grease matter whose curve of dilation is identical to that of cocoa butter (Machine-translation by Google Translate, not legally binding)
Procedure for the preparation of phosphoric acid submitted to a humidification procedure (Machine-translation by Google Translate, not legally binding)