Technology for directly producing brominated butyl rubber through solution method

The invention belongs to the technical field of catalysts, and relates to a technology for directly producing brominated butyl rubber through a solution method.The technology sequentially comprises the three steps of butyl rubber synthesis (I) through the solution method, chloromethane removal (II) and butyl rubber bromination (III), wherein brominated butyl rubber is produced through a butyl rubber bromination reaction of the solution method, the molecular weight of the brominated butyl rubber is 50,000 g/mol-500,000 g/mol, the molecular weight distribution is 1.1-4.0, and the brominated butyl rubber combined bromine content is 1.0-2.8%.In an alkane and chloromethane mixed solvent, on the low-temperature condition, a butyl rubber solution is produced through isobutene and isoprene positive ion copolymerization of the solution method, the butyl rubber solution is subjected to chloromethane removal and the brominated butyl rubber is obtained through a bromination stage.The technology has the advantage that the