| 摘要 |
1. A process for deodorizing a finely divided olefin polymer which has a particle diameter of from 1 to 6,000 mu m and has been obtained directly by homopolymerization of propylene or copolymerization of propylene with up to 20 mol % of ethylene, in the presence of a Ziegler-Natta catalyst, by means of a medium which flows through the olefin polymer at a temperature that is at least 10 degrees C below the crystallite melting point of the particular polymer, and takes up the odoriferous substances, this medium being a hydrocarbon compound, wherein the hydrocarbon compound is (i) an alkane or alkene of not more than three carbon atoms, (ii) a fluorinated and/or chlorinated methane or ethane or (iii) carbon-dioxide, and flows through the polymer at from 5 to 120 degrees C, under a pressure of from 30 to 300 bar, and in an amount of from 0.1 to 20 m**3 (S.T.P.) per kg of olefin polymer. |
