PROCESS FOR PREPARING RAW DIMETHYLTEREPHTHALATE

PROCESS FOR PREPARING RAW DIMETHYLTEREPHTHALATE

A process for purifying a crude ester containing dimethyl terephthalate, includes flash distilling a mixture including para-xylene and methyl para-toluate, and separating the crude ester into fractions. By separating the crude ester with a distillation column containing structured packing and using...

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Bibliographische Detailangaben
Hauptverfasser: SIGG REINHARD DR, NEUTZLER ULRICH, LENZ UDO, SCHOENGEN ANTON
Format: Patent
Sprache:cze ; eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:A process for purifying a crude ester containing dimethyl terephthalate, includes flash distilling a mixture including para-xylene and methyl para-toluate, and separating the crude ester into fractions. By separating the crude ester with a distillation column containing structured packing and using a lower bottom temperature, product yield is increased, and the process is made more economical.