Reduced fouling in polymerization reactors

Details Reduced fouling in polymerization reactors Reduced fouling in polymerization reactors

C - Chemistry, Metallurgy

08

F

C08F 2/01 (2006.01) B08B 17/02 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2692630

The treatment of a reactor for the gas phase, slurry, solution or high pressure polymerization of ethylene, optionally with comonomers, with a gas comprising not less than 50 volume% hydrogen at a temperature greater than 185° C for time up to about 30 hours reduces any Fe3+ (e.g. hematite) to Fe2+ (e.g. magnetite). As Fe3+ is known to be a catalytic site for deposition of carbon based deposits. A pre start up treatment reduces fouling in the reactor.

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