PHASE SEPARATION METHOD USING FLUOROHYDROCARBON Russian patent published in 2011 - IPC C08F210/12 C08F6/24 C08F6/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of separating hydrocarbon rubber from a polymer suspension containing hydrocarbon rubber dispersed in a diluent. The method involves the following steps: (a) bringing a polymer suspension into contact with a hydrocarbon solvent capable of dissolving hydrocarbon rubber to obtain a first liquid phase and a second liquid phase and (b) separating the first liquid phase from the second liquid phase. The diluent contains a fluorohydrocarbon. The first liquid phase contains at least 60 wt % fluorohydrocarbon in terms of the total weight of fluorohydrocarbon in the polymer suspension. The second liquid phase contains at least 90 wt % hydrocarbon rubber in terms of total weight of hydrocarbon rubber in the polymer suspension. The hydrocarbon rubber contains a polymer(s) and/or copolymer(s) of one or more olefins, alpha-olefins, disubstituted olefins, isoolefins, conjugated dienes, nonconjugated dienes, styrenes and/or substituted styrenes and vinyl ethers.

EFFECT: simple and cheap method of separating phases during polymerisation in a solvent and extracting hydrocarbon rubber from a polymer suspension containing hydrocarbon rubber.

27 cl, 2 tbl, 3 dwg