Patent ID: 6114475
Filing Date: 2000-09-05
Classification: C08F,F26B

Abstract:
A process for removing water from a gas phase polymerization reactor system having therein cool regions in which the water resides, said system optionally containing a resin bed, the removal being effected prior to carrying out a polymerization in the system, comprising(a) providing at least one compound in solid, liquid, or gaseous form capable of reducing the boiling point of water by at least about 2 degrees C.;(b) introducing the compound(s) into the system;(c) vaporizing the compound(s), which are in solid or liquid form, if any, into the gaseous form;(d) passing the compound(s) in gaseous form into the cool regions of the system wherein the gases condense to a liquid, and said liquid mixes with the water reducing the boiling point of the water;(e) increasing the temperature of and/or reducing the pressure in the system to vaporize the liquid/water mixture; and(f) removing the liquid/water mixture in vapor form by purging or venting from the system.