METHOD OF RECOVERING HALOGENATED BUTYL RUBBER FROM HYDROCARBON SOLUTION Russian patent published in 2006 - IPC C08F6/10 C08F6/12 C08F210/12 

FIELD: rubber industry.

SUBSTANCE: halogenated butyl rubber is recovered from hydrocarbon solution via multistage water degassing including granule formation stage, final distillation of hydrocarbons from rubber in several steps, in which pressure is gradually raised and reduced in final step, while vapor-gas mixture formed is ejected into one of preceding steps. Vapor-gas mixture from the last step, prior to be ejected, is fed into two cooled partial condensers, one of which receives initial solution of halogenated rubber transferred further into process and the other receives coolant amount of which being controlled with regard to specified pressure or temperature in the last distillation step.

EFFECT: reduced consumption of water steam when recovering halogenated butyl rubber and controlling parameters in the last distillation step while specified process parameters in preceding steps being preserved.

3 cl, 1 dwg, 3 tbl