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    41.
    发明专利
    未知

    公开(公告)号：DE59006268D1

    公开(公告)日：1994-08-04

    申请号：DE59006268

    申请日：1990-02-01

    Applicant: BASF AG

    Inventor： KERTH JUERGEN DR ,  SCHWAGER HARALD DR ,  ZOLK RALF DR

    IPC: C08F2/34 ,  C08F10/00 ,  C08F210/06 ,  C08F297/08

    Abstract: A process for the preparation of propylene-ethylene copolymers in an agitated fixed bed in which propylene is polymerised from the gas phase, initially in a first polymerisation zone at a pressure of from 20 to 40 bar and at a temperature of from 60 to 90 DEG C with feed of a Ziegler-Natta catalyst system, and, in a second polymerisation zone, at a pressure of from 7 to 35 bar and a temperature of from 40 to 70 DEG C, a mixture of olefins is polymerised onto the finely divided polymer discharged from the first polymerisation zone, is characterised in that, in the second polymerisation zone, a mixture of propylene, ethylene and a further alpha -olefin having 4 to 10 carbon atoms is polymerised on at a ratio between the partial pressures of propylene and ethylene in the range of from 100 : 20 to 100 : 120 and at a ratio between the partial pressures of propylene and the alpha -olefin in the range from 100 : 1 to 100 : 20, the pressure in the second polymerisation zone is chosen to be at least 5 bar below the pressure in the first polymerisation zone, and the weight ratio between the monomers reacted in the first and second polymerisation zones is such that it is in a range between 100 : 10 and 100 : 50.

    42.
    发明专利
    未知

    公开(公告)号：AT107935T

    公开(公告)日：1994-07-15

    申请号：AT90101949

    申请日：1990-02-01

    Applicant: BASF AG

    Inventor： KERTH JUERGEN DR ,  SCHWAGER HARALD DR ,  ZOLK RALF DR

    IPC: C08F2/34 ,  C08F10/00 ,  C08F210/06 ,  C08F297/08

    Abstract: A process for the preparation of propylene-ethylene copolymers in an agitated fixed bed in which propylene is polymerised from the gas phase, initially in a first polymerisation zone at a pressure of from 20 to 40 bar and at a temperature of from 60 to 90 DEG C with feed of a Ziegler-Natta catalyst system, and, in a second polymerisation zone, at a pressure of from 7 to 35 bar and a temperature of from 40 to 70 DEG C, a mixture of olefins is polymerised onto the finely divided polymer discharged from the first polymerisation zone, is characterised in that, in the second polymerisation zone, a mixture of propylene, ethylene and a further alpha -olefin having 4 to 10 carbon atoms is polymerised on at a ratio between the partial pressures of propylene and ethylene in the range of from 100 : 20 to 100 : 120 and at a ratio between the partial pressures of propylene and the alpha -olefin in the range from 100 : 1 to 100 : 20, the pressure in the second polymerisation zone is chosen to be at least 5 bar below the pressure in the first polymerisation zone, and the weight ratio between the monomers reacted in the first and second polymerisation zones is such that it is in a range between 100 : 10 and 100 : 50.

    43.
    发明专利
    未知

    公开(公告)号：AT107669T

    公开(公告)日：1994-07-15

    申请号：AT90120682

    申请日：1990-10-29

    Applicant: BASF AG

    Inventor： KOELLE PETER DR ,  SCHWAGER HARALD DR ,  KERTH JUERGEN DR ,  ZOLK RALF DR

    IPC: C08F10/06 ,  C08F4/60 ,  C08F4/642 ,  C08F4/646 ,  C08F4/649 ,  C08F4/651 ,  C08F4/654 ,  C08F10/00

    Abstract: Catalyst systems of the Ziegler-Natta catalyst type, containing, as active constituents, a) a titanium-containing solid component which contains titanium, magnesium, halogen and a carboxylic acid ester, and, as cocatalyst, b) an aluminium compound and c) optionally further electron-donor compounds, characterised in that they contain, as the carboxylic acid ester in the solid component a), an ester of a benzophenone-2-carboxylic acid of the formula I in which R is a hydrogen atom, a C1-C15-alkyl group or a halogen atom. These catalyst systems are particularly suitable for the preparation of polypropylene and copolymers of propylene with minor amounts of other alpha , beta -unsaturated olefinic compounds having 2 to 12 carbon atoms.

    49.
    发明专利
    未知

    公开(公告)号：DE3829519A1

    公开(公告)日：1990-03-01

    申请号：DE3829519

    申请日：1988-08-31

    Applicant: BASF AG

    Inventor： ZOLK RALF DR ,  KERTH JUERGEN DR ,  HEMMERICH RAINER DR

    IPC: C08F4/658 ,  C08F4/02 ,  C08F4/58 ,  C08F4/60 ,  C08F4/64 ,  C08F4/646 ,  C08F10/00 ,  C08F10/06

    Abstract: The invention relates to the preparation of polymers of propene by means of a Ziegler-Natta catalyst system comprising (1) a titanium component which is based on a finely divided, shaping silica gel and contains titanium, magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an aluminium component and (3) a silane component, characterised in that the titanium component (1) used is obtained by (1.1) first (I) preparing a carrier from (Ia) a silica gel, (Ib) an organomagnesium compound, (Ic) a gaseous chlorinating agent and (Id) a certain phthalic acid derivative, by (1.1.1) first reacting (Ia) with (Ib), (1.1.2) then passing (Ic) into the product from (1.1.1) and introducing the phthalic acid derivative (Id) and isolating (I), (1.2) then preparing a solid-phase intermediate from (I), (II) an alkanol, and (III) titanium tetrachloride by (1.2.1) first reacting (I) with (II), (1.2.2) subsequently introducing (III) into the product from (1.2.1), (1.3) then extracting the solid-phase product from (1.2) with titanium tetrachloride or a mixture of titanium tetrachloride and ethylbenzene, and (1.4) finally washing the solid-phase product from (1.3) with a liquid hydrocarbon.

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