Abstract: A method and apparatus for recovering vapors from a polymer solution comprising liquid solvent and polymer. The solution is passed from first and second strippers to a crumb slurry tank. Vapors from the slurry tank and second stripper are combined and used as the stripping medium for the first stripper.

Abstract: A method and apparatus for recovering vapors from a polymer solution comprising liquid solvent and polymer.

Abstract: A solution polymerization process in which polymerizable diolefin monomer, is contacted under polymerization conditions in the presence of a volatile and inert earth hydrocarbon diluent having 3 to 5 carbon atoms per molecule and a hydrocarbon solvent having 6 to 10 carbon atoms per molecule to yield a product mixture easily concentrated by flash evaporation. In preferred embodiments the diluent is present in an amount such that the monomer concentration is about 30 to about 45 weight percent in the total of monomer and diluent entering the reaction and the solvent is present in an amount such that the weight ratio of the total of solvent and diluent to monomer entering the reaction is in the range of about 4:1 to 12:1.