Multistage process for (co) polymerization of olefins
Номер патента: FI961268A0
Опубликовано: 19-03-1996
Автор(ы): Gabriele Govoni, Mario Sacchetti, Stefano Pasquali
Принадлежит: Montell Technology Company Bv
Опубликовано: 19-03-1996
Автор(ы): Gabriele Govoni, Mario Sacchetti, Stefano Pasquali
Принадлежит: Montell Technology Company Bv
Реферат: Multistage process for the polymerization of olefins CH2=CHR, where R is hydrogen or an alkyl, cycloalkyl or aryl radical with 1-10 carbon atoms, comprising two stages of polymerization. In a first stage, in the presence of a titanium or a vanadium catalyst and working in one or more reactors, an olefinic polymer with particular values of porosity is prepared; in a second stage, in the presence of the said porous polymer and a metallocene compound and/or their reaction products, one or more olefins, that are equal to or different from those polymerized in the first stage, are polymerized in one or more reactors.
Production of polyolefin catalyst on carrier and process for gas phase (co)polymerization of ethylene, as well as catalyst composition
Номер патента: HUT61782A. Автор: Claude Chamla,Erick Daire. Владелец: Bp Chem Int Ltd. Дата публикации: 1993-03-01.