C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 263/10 (2006.01) C08G 18/32 (2006.01) C08G 18/72 (2006.01) C07C 265/14 (2006.01)
Patent
CA 2442467
The present invention provides a process for quenching a gaseous reaction mixture during the phosgenation of diamines in the gas phase to produce diisocyanates. The gaseous reaction mixture contains at least a diisocyanate, phosgene and hydrogen chloride. The quenching liquid is injected into the gas mixture continuously flowing out of a cylindrical reaction zone into the downstream cylindrical quenching zone with the aid of at least two spray nozzles which are arranged at the entrance to the quenching zone at equal distances along the circumference of the quenching zone.
Dans la présente invention, on divulgue un procédé pour piéger un mélange gazeux réactif pendant la phosgénation de diamines en phase gazeuse pour produire des diisocyanates. Le mélange gazeux réactif contient au moins un diisocyanate, du phosgène et de l'acide chlorhydrique. Le liquide de piégeage est injecté dans le mélange gazeux en continu et s'écoule d'une zone de réaction cylindrique vers la zone de piégeage cylindrique en aval grâce à au moins deux buses de pulvérisation qui sont disposées à l'entrée de la zone de pégeage à distance égale le long de la circonférence de la zone de piégeage.
Brockhaus Hans-Joachim
Herold Heiko
Michele Volker
Stutz Herbert
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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