Recovery and using method of solution and unreaction monomer in process of producting polymer by solution polymerization process

This invention relates to reutilization method of solvent and not reaction monomer in process of producing polymer by solution polymerization method. Cohesion oil phase input stuff at middle of refining recovery tower that 10 to 40 pieces theoretical plate number distance from tower top; supplement of greenness monomer input stuff at refining tower that 5 to 15 pieces theoretical plate number distance from tower top; the monomer distilled off from tower top takes regurgitation by infinite reflux or large reflux ratio, and abstract free water from return tank; the inert constituents which enrich in monomer and most is mono-alkenes recovered from tower top; solvent and monomer transit dehydration zone of reclaim refining tower stripping section, siding recovered by vapor phase at 5 to 15 pieces theoretical plate number distance from top, by freezing and adsorption refining, then for directly use after polymerization process; Tower bottoms that enrich heavy constituents recovered from tower pot. It just adopts a dephlegmator for produce, be able to extensively used in solution polymerization of different kinds of polymer, especially isoprene rubber and CPBR.