C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 265/14 (2006.01) C07C 29/00 (2006.01) C07C 31/02 (2006.01) C07C 37/055 (2006.01) C07C 39/04 (2006.01) C07C 263/04 (2006.01)
Patent
CA 2199919
This present invention relates to a process for thermally cracking carbamic acidesters into the corresponding isocyanate and hydroxyl compounds in the liquid phase, wherein the reaction proceeds as a reactive rectification in the stripping zone of a column and in an inert, high-boiling solvent, which acts as a buffer to keep the reaction away from the evaporator region of the column.
La présente invention concerne un procédé de craquage thermique des esters carbamiques en leurs composés isocyanate et hydroxyle correspondants en phase liquide, où la réaction se déroule comme une rectification réactive dans la zone de rectification d'une colonne et dans un solvant inerte à point d'ébullition élevé, qui agit comme tampon pour garder la réaction séparée de la zone d'évaporation de la colonne.
Dahmer Jurgen
Kabelac Stephan
Litz Wilfried
Nachtkamp Klaus
Rasp Christian
Aktiengesellschaft Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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