Title:
PROCESS FOR PREPARING CARBOXYLIC ESTERS BY REACTIVE DISTILLATION
Document Type and Number:
WIPO Patent Application WO/2011/131643
Kind Code:
A3
Abstract:
In a process for preparing carboxylic esters by transesterification, a first feed stream comprising a first carboxylic ester, e.g. methyl formate, is introduced at the side into a reaction column at a first inlet located between the top and the bottom of the reaction column and a second feed stream comprising a first alcohol, e.g. ethanol, is introduced at the side into the reaction column at a second inlet located above the first inlet and the feed streams are reacted in a reaction zone of the reaction column to form a second carboxylic ester and a second alcohol. The first alcohol has a higher molecular weight than the second alcohol. A product fraction comprising the second carboxylic ester and unreacted first carboxylic ester is taken off at an offtake located above the second inlet. A bottom fraction comprising the second alcohol and unreacted first alcohol is taken off at the bottom of the reaction column. The product fraction is separated by distillation at a pressure which is different from the pressure in the reaction column into second carboxylic ester and a fraction containing unreacted first carboxylic ester and the fraction containing unreacted first carboxylic ester is at least partly recirculated to the reaction zone.
Inventors:
KRONEMAYER HELMUT (DE)
DAHLHOFF ELLEN (DE)
LANVER ANDREAS (DE)
DAHLHOFF ELLEN (DE)
LANVER ANDREAS (DE)
Application Number:
PCT/EP2011/056189
Publication Date:
December 29, 2011
Filing Date:
April 19, 2011
Export Citation:
Assignee:
BASF SE (DE)
KRONEMAYER HELMUT (DE)
DAHLHOFF ELLEN (DE)
LANVER ANDREAS (DE)
KRONEMAYER HELMUT (DE)
DAHLHOFF ELLEN (DE)
LANVER ANDREAS (DE)
International Classes:
C07C67/03
Foreign References:
| DE102007006917A1 | 2008-08-14 | |||
| EP0968995A1 | 2000-01-05 |
Other References:
LIU ET AL: "Transesterification of methanol with ethyl acetate and ethanol with methyl formate catalysed by DBN", JOURNAL OF NATURAL GAS CHEMISTRY., vol. 7, no. 4, 1 January 1998 (1998-01-01), CHENGDU INSTITU OF ORGANIC CHEMISTRY, ACADEMIA SINICA., pages 313 - 318, XP002660665
Attorney, Agent or Firm:
PATENTANWÄLTE REITSTÖTTER KINZEBACH (München, DE)
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