Process for the polymerization of olefins
Abstract
Abstract WHEREIN R, R'', R", R"'' AND R"" ARE EACH AN ALKYL GROUP HAVING 1-10 CARBON ATOMS, AND THE ATOMIC RATIO OF SILICON IN THE PENTAALKYLSILOXYALANE TO CHROMIUM IN THE CHROMIUM OXIDE IS IN THE RANGE OF 0.01-500 INTERMS OF SI/CR. R-SI(-R'')(-R")-O-AL(-R"'')-R"" THE CATALYST OF THE INVETION COMPRISES A FIRST AND A SECOND CATALYST COMPONENT. THE FIRST CATALYST COMPONENT IS PREPARED BY IMMERSING AT LEAST ONE OF A HEAT-RESISTANT METAL OXIDE SEELCTED FROM THE GROUP CONSISTING OF SILICA AND SILICA-ALUMINA INTO A AQUEOUS SOLUTION OF CHROMIUM TRIOXIDE, DRYING THE IMMERSED METAL OXIDE AND THEN CALCINCING IT IN A GASEOUS OXYGEN ATMOSPHERE AT A TEMPERATURE RANGING FROM 500* TO 1000*C. THE SECOND CATALYST COMPONENT COMPRISES A PENTAALKYLSILOXYALANE HAVING THE FORMULA:
Inventors
- 👤 Koichiro Iwasaki
- 👤 Kazuo Yamaguchi
- 👤 Junichi Matsuura
- 👤 Masayoshi Hasuo
- 👤 Kazuhisa Kojima
Bibliographic Details
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