Title:
ジイソシアネートの製造方法
Document Type and Number:
Japanese Patent JP4469630
Kind Code:
B2
Abstract:
Production of diisocyanates comprises phosgenation of the corresponding diamine comprises separately heating the diamine vapor, optionally diluted with an inert gas or inert solvent, and phosgene at 200-600 [deg]C and feeding the diamine containing stream through at least two nozzles parallel to the axis of the tubular reactor while the phosgene stream is fed via the remaining free chamber. A process for the production of diisocyanates (I) of formula (1) by phosgenation of the corresponding diamine of formula (2) comprises separately heating the diamine vapor, optionally diluted with an inert gas or the vapor of an inert solvent, and phosgene at 200-600 [deg]C and mixing and reacting in a tubular reactor having at least two nozzles parallel to the axis of the tubular reactor such that the diamine containing stream is fed to the reactor through the nozzles and the phosgene stream is fed to the reactor via the remaining free chamber. OCN-R-NCO (1) H 2N-R-NH 2(2) R : 2-15 (4-13) C (cyclo)aliphatic or aromatic hydrocarbon.
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Inventors:
Claus Biscup
Peter Kerdenig
Peter Hoaman
Christian Zix
Peter Kerdenig
Peter Hoaman
Christian Zix
Application Number:
JP2004043477A
Publication Date:
May 26, 2010
Filing Date:
February 19, 2004
Export Citation:
Assignee:
Bayer Aktiengesellschaft
International Classes:
C07C263/10; B01F5/04; B01J10/00; C07C265/14
Domestic Patent References:
| JP2000756A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel