申请人:SCHMIDT Andrea
公开号:US20130144080A1
公开(公告)日:2013-06-06
The invention relates to a process for obtaining a dialkyl carbonate and an alkylene glycol from a stream comprising dialkyl carbonate, alkylene carbonate, alkylene glycol and alcohol, comprising the following steps:
(a) distillatively removing a stream (
5
) comprising dialkyl carbonate and alkylene glycol as a heteroazeotrope from the stream comprising dialkyl carbonate, alkylene carbonate, alkylene glycol and alcohol in a first distillation stage (
1
),
(b) separating the stream (
5
) comprising dialkyl carbonate and alkylene glycol as a heteroazeotrope into a first crude product stream (
27
) comprising essentially di-alkyl carbonate and a second crude product stream (
29
) comprising essentially alkylene glycol in an apparatus for phase separation (
25
).
本发明涉及一种从包括二元碳酸酯、环氧丙烷、环氧乙烷和醇的流中获取二元碳酸二烷基酯和烷基二醇的方法,包括以下步骤:(a) 在第一蒸馏级(1)中从包括二元碳酸酯、环氧丙烷、环氧乙烷和醇的流中以蒸馏方式去除一条流(5),该流包括二元碳酸二烷基酯和烷基二醇作为异构共沸物,(b) 在相分离设备(25)中将包括基本上二元碳酸二烷基酯的第一粗产品流(27)和包括基本上烷基二醇的第二粗产品流(29)从异构共沸物流(5)中分离。