Patent ID: 9428593
Filing Date: 2016-08-30
CPC Classification: B01J,C08F

Claim Text:
1. A single pass shell and tubes type polymerization reactor ( 1 ), used to produce butyl rubber in slurry, copolymerizing at least 95 wt % of isobutylene with not more than about 5 wt % of isoprene, in concentration of about 35% to 45% by vol. in a solvent, preferably methyl chloride, in presence of 0.015% to 0.15% by weight of catalyst, preferably aluminum chloride, and at a temperature within the range of −104° C. to −90° C., wherein the velocity in the tubes is in the range from 2.4 to 4.5 m/sec, wherein the reaction mixture is introduced from the bottom side near an impeller shaft ( 5 ) and the outflow ( 11 ) is in the top, with the reaction in tube side and a cooling media in the shell side ( 19 ) to remove the heat of reaction, and a circulation pump installed at the bottom ( 4 ), to permit high velocity of the rubber slurry in the central draft tube ( 2 ) and in downflow smaller tubes ( 6 ), the reactor comprising: a—an extended upper head ( b—an hemispheric bottom head ( c—three straightening baffles (