Targor Gmbh

Roland Zenk

Frank Kuber

Michael Aulbach

Walter Spaleck

Hans-Friedrich Herrmann

Cornelia Fritze

Erich Hubscher

Andreas Winter

Michael-Joachim Brekner

Volker Fraaije

Carsten Bingel

Michael Riedel

Ivan Cabrera

Frank K&uuml;ber

Thomas Wisser

Claus-Peter Niesert

Thomas Rink

Johann Streb

Wilhelm Kaufmann

The present invention relates to a metallocene compound containing at least two metallocene fragments L&mdash;MX,&mdash;L which are different from one another and having the formula I

Multinuclear metallocene compound, a process for its preparation and its use as catalyst

The present invention relates to a new metallocene having the formula (I) ##STR1## where M is a metal of group IVb, Vb or VIb of the Periodic Table of the Elements, in particular Ti, Zr and Hf,

Metallocenes

Metallocene compound and its use as catalyst component The present invention relates to a multinuclear metallocene compound of the formula I, ##STR1## where M.sup.1 is a tetravalent metal, L.sup.1 are, independently of one another, identical or different and are each a substituted cyclopentadienyl group, L.sup.2 and L.sup.3 are, independently of one another, identical or different and are each a .pi. ligand, B are, independently of one another, identical or different and are each a divalent bridging unit, X are, independently of one another, identical or different and are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.10 -fluorocarbon radical or a hydrocarbon-containing radical having 1-40 carbon atoms, and k is an integer from 0 to 10. The metallocene compound of the present invention is suitable as a catalyst component for preparing olefin polymers.

Metallocene compound and its use as catalyst component

The present invention relates to a metallocene of the formula I, ##STR1## for preparing polyolefins, where M.sup.1 is preferably Zr, Hf or Ti, R.sup.1 and R.sup.2 are each a hydrogen atom, a C.sub.1 -C.sub.3 -alkyl group, a C.sub.1 -C.sub.3 -alkoxy group, a C.sub.6 -C.sub.8 -aryl group, a C.sub.6 -C.sub.8 -aryloxy group, a C.sub.2 -C.sub.4 -alkenyl group, a C.sub.7 -C.sub.10 -arylalkyl group, a C.sub.7 -C.sub.12 -alkylaryl group, a C.sub.8 -C.sub.12 -arylalkenyl group or chlorine, R.sup.3 is a chlorine atom, a C.sub.1 -C.sub.3 -alkyl group, a C.sub.2 -C.sub.4 -alkenyl group, a C.sub.6 -C.sub.8 -aryl group, an NR.sup.16.sub.2, SR.sup.16, OSiR.sup.16.sub.3, SiR.sup.16.sub.3 or PR.sup.16.sub.2 radical where R.sup.16 is chlorine, a C.sub.1 -C.sub.4 -alkyl group or a C.sub.6 -C.sub.8 -aryl group. R.sup.4 is a hydrogen atom, R.sup.13 is --(R.sup.14 M.sup.2 R.sup.15)--, --(R.sup.14 CR.sup.15)--(R.sup.14 CR.sup.15)--, --(R.sup.14 CR.sup.15)--(R.sup.14 M.sup.2 R.sup.15)-- or --(R.sup.14 CR.sup.15)--, where R.sup.14 and R.sup.15 are each a hydrogen atom, chlorine, an Si(methyl).sub.3 group, an N(methyl).sub.2 group, an N(phenyl).sub.2 group, an Si(phenyl).sub.3 group, a B(methyl).sub.2 group, a B(phenyl).sub.2 group, a C.sub.1 -C.sub.4 -alkyl group, in particular a methyl group, a CF.sub.3 group, a C.sub.6 -C.sub.12 -aryl group, a pentafluorophenyl group, a C.sub.1 -C.sub.4 -alkoxy group, in particular a methoxy group, a C.sub.2 -C.sub.4 -alkenyl group, a C.sub.7 -C.sub.10 -arylalkyl group, a C.sub.8 -C.sub.12 -arylalkenyl group or a C.sub.7 -C.sub.12 -alkylaryl group, or R.sup.14 and R.sup.15 together with the atoms connecting them form a ring, M.sup.2 is silicon or germanium, z is 0 or 1, R.sup.x and R.sup.y are identical where R.sup.5 to R.sup.9 are as defined for R.sup.14, and l+m+n+o+p.gtoreq.2 and .ltoreq.5, and l+n+p is .gtoreq.1, where l, n, m, o or p can be 0, 1, 2 or 3 or R.sup.5 to R.sup.9 together with the atoms connecting them form one or more rings.

Metallocenes containing partially hydrogenated p-ligands

The present invention relates to a multinuclear metallocene compound of the formula I, ##STR1## where M.sup.1 is a tetravalent metal, L.sup.1 are, independently of one another, identical or different and are each a substituted cyclopentadienyl group, L.sup.2 and L.sup.3 are, independently of one another, identical or different and are each a .pi. ligand, B are, independently of one another, identical or different and are each a divalent bridging unit, X are, independently of one another, identical or different and are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.10 -fluorocarbon radical or a hydrocarbon-containing radical having 1-40 carbon atoms, and k is an integer from 0 to 10. The metallocene compound of the present invention is suitable as a catalyst component for preparing olefin polymers.

The present invention relates to a process for the hydrogenation of metallocenes, which comprises treating at least one metallocene containing at least one double bond and/or at least one aromatic substituent in at least one nonhalogenated solvent with hydrogen in the presence of at least one hydrogenation catalyst.

Process for the hydrogenation of metallocenes

The present invention relates to a process for reducing the concentration of organometallic and/or inorganic by-products in product mixtures formed in the synthesis of metallocenes, which comprises treating a mixture comprising one or more metallocenes and one or more organometallic and/or inorganic by-products with a polar extractant.

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Bad Soden, Germany

Roland Zenk