ES252404A1 - A process for determining rough dimethyl terthtalate obtained by depolimerization of polyethylene therethalate (Machine-translation by Google Translate, not legally binding)
- Google Patents
A process for determining rough dimethyl terthtalate obtained by depolimerization of polyethylene therethalate (Machine-translation by Google Translate, not legally binding)
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Glanzstoff AG
Vereinigte Glanzstoff Fabriken AG
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Glanzstoff AG
Vereinigte Glanzstoff Fabriken AG
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Publication of ES252404A1publicationCriticalpatent/ES252404A1/en
A process for purifying crude dimethyl terephthalate, obtained by depolymerization of polyethylene terephthalate by crystallization, characterized in that the crude ester obtained hot in the first phase, is allowed to crystallize in the presence of methanol at 58-50º C, until at least 50% of the dimethyl terephthalate contained in the slow product has precipitated, the crystallization then continuing at 48º C, until no further dimethyl terephthalate is precipitated, after which the resulting crystal slurry is removed at temperatures above 27º C and centrifuged immediately. (Machine-translation by Google Translate, not legally binding)
ES0252404A1959-01-141959-10-02A process for determining rough dimethyl terthtalate obtained by depolimerization of polyethylene therethalate (Machine-translation by Google Translate, not legally binding)
ExpiredES252404A1
(en)
A process for determining rough dimethyl terthtalate obtained by depolimerization of polyethylene therethalate (Machine-translation by Google Translate, not legally binding)
A process for determining rough dimethyl terthtalate obtained by depolimerization of polyethylene therethalate (Machine-translation by Google Translate, not legally binding)
Procedure for obtaining a compound of addition of hexametilentetramine with p-aminobencenosulfonamide (Machine-translation by Google Translate, not legally binding)
Procedure for the obtaining of esters of the acetidino-tiazolidin-metanocarboxilico acid. (Machine-translation by Google Translate, not legally binding)