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    21.
    发明专利
    未知

    公开(公告)号：DE59206844D1

    公开(公告)日：1996-09-05

    申请号：DE59206844

    申请日：1992-09-23

    Applicant: BASF AG

    Inventor： FUNK GUIDO DR ,  HEMMERICH RAINER DR ,  GROPPER HANS DR ,  KOLK ERICH DR ,  FOLLMER GODOFREDO DR

    IPC: C08F4/02 ,  C08F4/06 ,  C08F4/22 ,  C08F4/24 ,  C08F4/69 ,  C08F10/00 ,  C08F10/02

    Abstract: In a new process for the preparation of a supported catalyst for the polymerisation of alpha -olefins, first a support gel (1) is prepared by introducing a sodium water glass or potassium water glass solution into a swirling stream of an aqueous mineral acid optionally containing aluminium ions longitudinally and tangentially to the stream, spraying the resultant silicic acid hydrosol in drop form into a gaseous medium, and allowing it to solidify to form a hydrogel, and freeing the resultant hydrogel, without prior ageing, from salts by washing and optionally from some of the water by extraction with alcohols and/or ketones, and then drying the hydrogel. This gives the support gel (1), which is ground and fractionated according to particle size. In a second process step, the support gel (1) is charged with chromium trioxide or with a chromium compound which can be converted into chromium trioxide, after which the resultant chromium-containing support gel (2) is heated at from 400 to 1100 DEG C for from 10 to 1000 minutes in an anhydrous gas stream containing oxygen in a concentration greater than 10% by volume. It is essential for the process according to the invention that the drying of the hydrogel to form the support gel (1) takes place in a high-speed drier within a maximum time of 300 seconds at an inlet temperature of from 200 to 600 DEG C. The supported catalyst prepared in this way gives homopolymers and copolymers of ethylene having excellent low-temperature toughness.

    Process for the preparation of homopolymers and copolymers of propene by means of a Ziegler-Natta catalyst system
    27.
    发明专利
    Process for the preparation of homopolymers and copolymers of propene by means of a Ziegler-Natta catalyst system 未知

    公开(公告)号：DE3830195A1

    公开(公告)日：1990-03-15

    申请号：DE3830195

    申请日：1988-09-06

    Applicant: BASF AG

    Inventor： ZOLK RALF DR ,  KERTH JUERGEN DR ,  HEMMERICH RAINER DR ,  SCHWEIER GUENTHER DR ,  MUELLER-MALL RUDOLF DR

    IPC: C08F4/642 ,  C08F4/649 ,  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 based on a finely divided, shape-providing silica gel and containing magnesium, chlorine and a benzenecarboxylic acid derivative in addition to titanium, (2) an aluminium component and (3) a silane component, characterised in that a titanium component (1) is used which is obtained by (1.1) first (I) preparing a support material from (Ia) a silica gel, (Ib) an organomagnesium compound and (Ic) a gaseous chlorinating agent by (1.1.1) at first reacting (Ia) with (Ib), (1.1.2) then passing (Ic) into the product from (1.1.1) and isolating (I), (1.2) then preparing a solid-phase intermediate from (I), (II) an alkanol, (III) titanium tetrachloride and (IV) a phthalic acid derivative by (1.2.1) first reacting (I) with (II), (1.2.2) subsequently introducing (III) into the product from (1.2.1), with the proviso that (IV) is also introduced during (1.2.1) or (1.2.2), (1.3) then extracting the solid product from (1.2) with titanium tetrachloride or a mixture of titanium tetrachloride and ethylbenzene, and (1.4) finally washing the solid product from (1.3) with a liquid hydrocarbon.

    30.
    发明专利
    未知

    公开(公告)号：ES2104446T3

    公开(公告)日：1997-10-01

    申请号：ES95108203

    申请日：1995-05-30

    Applicant: BASF AG

    Inventor： KOLLE PETER DR ,  MULLER PATRIK DR ,  HEMMERICH RAINER DR ,  KOLK ERICH DR

    IPC: C08F4/64 ,  C08F4/642 ,  C08F4/646 ,  C08F10/00

    Abstract: Processing Ziegler-Natta (S-N) catalyst systems contg. (a) a Ti-contg. solid component contg. electron donor(s), in the form of a suspension in inert solvent, and as co-catalyst; (b) an Al cpd.; and (c) opt. other electron donor cpds. comprises removing the solvent from suspension (a) by (1) filtering the suspension and then (2) removing more solvent by applying a pressure difference at not above 100 degrees C. Also claimed are the obtd. catalyst systems.

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