Title:
反応混合物からのイソシアネートの分離
Document Type and Number:
Japanese Patent JP4324559
Kind Code:
B2
Abstract:
The present invention relates to a process for preparing isocyanates by reaction of amines with phosgene in a reactor and subsequent separation of the isocyanate from the reaction mixture leaving the reactor and purification of the isocyanate, wherein the separation and purification of the isocyanate is carried out in a column having a pressure at the top of 1-950 mbar, preferably 5-50 mbar, particularly preferably 10-20 mbar, and a temperature at the bottom of 90-250° C., preferably 120-170° C., particularly preferably 130-150° C., and the pure isocyanate stream is preferably taken off in liquid or gaseous form at a side offtake of the column.
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Inventors:
Zone, martin
Streffer, Eckhart
Nefyans, Philip
Penzell, Ulrich
Palash, Hans-Jurgen
Michael, Zander
Schwarz, Hans, Volkmar
Mackenroth, Wolfgang
Streffer, Eckhart
Nefyans, Philip
Penzell, Ulrich
Palash, Hans-Jurgen
Michael, Zander
Schwarz, Hans, Volkmar
Mackenroth, Wolfgang
Application Number:
JP2004561289A
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:
| JP2004155760A | ||||
| JP9052873A |
Attorney, Agent or Firm:
Satoshi Eto