Patent ID: 7531084
Filing Date: 2009-05-12
Classification: B01J,C07C,F28D

Abstract:
1. A reactor comprising devices for introduction of heat into the reactor, wherein the devices are heat exchanger plates wherein a heat transfer medium flows through said heat exchanger plates, said reactor is capable of carrying out a thermal cleavage of monofunctional and/or polyfunctional carbamic esters into the corresponding isocyanate and hydroxyl components in a liquid phase without addition of a solvent, and the reactor is capable of carrying out said cleavage in a two-phase mixture comprising a gas content of over 50% by volume due to the geometry of said reactor, wherein the geometry is defined by the ratio of the degassing area to the volume of the liquid phase and the arrangement of the heating surfaces, wherein the heat exchanger plates are configured as segments of a circle arranged parallel to one another and perpendicular to the longitudinal axis of the reactor in the lower half of the reactor, and wherein the heat exchanger plates are supported by curved pipe sections in a largely vibration-free manner along feed and distribution pipes arranged in the longitudinal direction of the reactor above the heat exchanger plates.