C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/455, 260/637
C07C 31/125 (2006.01) C07C 27/00 (2006.01) C07C 31/02 (2006.01)
Patent
CA 1216588
CONTINUOUS PROCESS FOR THERMAL SPLITTING OF CARBAMIC ACID ESTERS ABSTRACT OF THE DISCLOSURE N-monosubstituted carbamic acid esters are thermally split on a continuous basis in a tube reactor. The carbamic acid ester which is flowed down or passed over the inner wall of a tube reactor is thermally split at a temperature of from 150 to 450°C and under a pressure of from 0.001 to 20 bar into at least two fractions. One fraction is predominantly isocyanate and a second fraction is predominantly hydroxyl compound. These fractions may be separated by removing one as a gaseous fraction formed under the splitting conditions from the head of the reactor and collecting the second fraction as a liquid which accumulates at the base of the reactor. If both fractions are gaseous under the splitting conditions, they are both removed from the head of the reactor and subsequently separated by fractionating columns for example. This process is particularly advantageous in that isocyanate and hydroxyl fractions are obtained in high yield without using a solvent.
425476
Engbert Theodor
Hammen Gunter
K"onig Klaus
Knofel Hartmut
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
LandOfFree
Continuous process for thermal splitting of carbamic acid... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous process for thermal splitting of carbamic acid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for thermal splitting of carbamic acid... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1295177