Multi-span continuous P.S.C - I beam bridge by division tension and its construction method

摘要

A catalyst for olefin polymer production which comprises (a) a compound of a transition metal of Groups 8 to 10 of the Periodic Table, (b) a clay, a clay mineral, or an ion-exchanging lamellar compound, (c) a silane compound, and (d) an organoaluminum compound and/or (e) an alkylating agent; and a catalyst for olefin polymer production which comprises ingredients (a), (b), and (d) and optionally contains ingredient (e). The catalysts do not necessitate a large aluminoxane amount and are highly active. With the catalysts, an olefin polymer of satisfactory quality having a satisfactory morphology and reduced in residual metal content can be efficiently produced.