Title:
イソシアネート合成由来の反応混合物からの溶媒の分離及びその精製
Document Type and Number:
Japanese Patent JP4324560
Kind Code:
B2
Abstract:
The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solvent is separated off in a two-stage or multistage, preferably two-stage, distillation process in which the solvent is separated off at a pressure of 0.1-15 bar in a first apparatus and at 1-900 mbar in a second apparatus or further apparatuses, with the heat of condensation of the solvent vapor from the first apparatus being used for partial or complete vaporization of solvent in the second apparatus.
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Inventors:
Zone, martin
Streffer, Eckhart
Nefyans, Philip
Penzell, Ulrich
Palash, Hans-Jurgen
Van den abert, peter
Debert, Philip
Jacobs, Yang, Day
Mackenroth, Wolfgang
Streffer, Eckhart
Nefyans, Philip
Penzell, Ulrich
Palash, Hans-Jurgen
Van den abert, peter
Debert, Philip
Jacobs, Yang, Day
Mackenroth, Wolfgang
Application Number:
JP2004561290A
Publication Date:
September 02, 2009
Filing Date:
December 13, 2003
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/20; C07C263/10; C07C265/14
Domestic Patent References:
| JP2004155761A | ||||
| JP58090540A |
Attorney, Agent or Firm:
Satoshi Eto