Distillation: processes – separatory – Plural distillations performed on same material
Patent
1998-05-13
2000-08-01
Manoharan, Virginia
Distillation: processes, separatory
Plural distillations performed on same material
202158, 203 73, 203 80, 203 88, 560 78, B01D 306, B01D 314, C07C 6754
Patent
active
060961716
ABSTRACT:
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.
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Ullman vol. 22, 4th Edition, pp. 529-533, G. Hoffman et al. "Terephthalsaeuredimethylester" (Dimethyl Terephthalate).
Lenz Udo
Neutzler Ulrich
Schoengen Anton
Sigg Reinhard
Huels Aktiengesellschaft
Manoharan Virginia
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