| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple method for producing polypropylene containing a slight amount of a catalyst residue. SOLUTION: The method for producing polypropylene by polymerizing propylene uses a polymerization catalyst obtained by the contact treatment of a solid catalyst component (B), an organic aluminum compound (C), and an electron donating compound (D), wherein, the polymerized polypropylene is contacted with a liquified propylene containing a 3-8C secondary alcohol in a range of molar ratio of 3-1,000 to the organic aluminum compound (C). COPYRIGHT: (C)2010,JPO&INPIT
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