Industrial process for separating out dialkyl carbonate

Details Industrial process for separating out dialkyl carbonate Industrial process for separating out dialkyl carbonate

2006-12-15

2011-11-01

Shiao, Rei-tsang (Department: 1628)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

Reexamination Certificate

active

08049028

ABSTRACT:
It is an object of the present invention to provide a specific apparatus and process for using a single distillation column on a low boiling point reaction mixture containing a large amount of a dialkyl carbonate and an aliphatic monohydric alcohol produced through a reactive distillation process of taking a cyclic carbonate and the aliphatic monohydric alcohol as starting materials, continuously feeding the starting materials into a continuous multi-stage distillation column in which a homogeneous catalyst is present, and carrying out reaction and distillation simultaneously in the column, so as to separate the low boiling point reaction mixture by distillation into a column top component BThaving the aliphatic monohydric alcohol as a main component thereof and a column bottom component BBhaving the dialkyl carbonate as a main component thereof stably for a prolonged period of time industrially.

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