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USE OF MINERAL OIL TO SUPPRESS SHEETING IN CHROME BASED GAS PHASE POLYETHYLENE REACTORS

IP.com Disclosure Number: IPCOM000033627D
Publication Date: 2004-Dec-20

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention relates to the use on deaerated mineral oil for start up and successful operation of gas phase polyethylene reactors using chromium based catalysts. The mineral oil acts to prevent static charge build up and reduces resin accumulation and agglomeration which can cause shutdown. The mechanism is a coating of resin and reactor wall surfaces with a high boiling agent which acts to prevent direct contact between resin and metal surface, thus reducing static charging.