Patent ID: 8598283
Filing Date: 2013-12-03
Classification: C08F

Abstract:
1. A method for idling a gas phase polymerization reactor, comprising: introducing a polymerization neutralizer to the reactor in an amount sufficient to stop polymerization therein; stopping recovery of a polymer product from the reactor; stopping introduction of a catalyst feed and a reactor feed to the reactor; adjusting a pressure within the reactor from an operating pressure to an idling pressure; adjusting a superficial velocity of a cycle fluid through the reactor from an operating superficial velocity to an idling superficial velocity; and maintaining the reactor in an idled state for a period of time, wherein the operating pressure ranges from about 1,800 kPag to about 2,300 kPag, and wherein the idling pressure ranges from about 650 kPag to about 800 kPag, and wherein the operating superficial velocity is greater than about 0.65 m/s and the idling superficial velocity ranges from about 0.50 m/s to about 0.65 m/s.