Prevention of pvc polymer buildup in polymerization reactors...

Details Prevention of pvc polymer buildup in polymerization reactors... Prevention of pvc polymer buildup in polymerization reactors...

C - Chemistry, Metallurgy

08

F

23/431, 402/545

C08F 2/18 (2006.01) C08F 2/00 (2006.01) C08F 14/06 (2006.01)

Patent

CA 1130049

Abstract of the Disclosure Polymer buildup in polymerization reactions during vinyl chloride polymerizations is greatly reduced by applying a water dispersion of alumina and oxalyl bis(benzylidenehydrazide) (OABH) to the reactor surfaces exposed to the polymerization medium prior to carrying out the polymerization. Long term effects of the buildup pre- ventor can be obtained by applying a caustic wash to the reactor walls, prior to applying the oxalyl bis(benzyli- denehydrazide) and alumina dispersion. The effect of the OABH/alumina and caustic is synergistic since the preven- tative effect is greater than either material used alone,

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