Basell Polyolefine Gmbh

Basell Technology Company B.v.

Robert L Jones

Luigi Resconi

Michael J Elder

John A Ewen

Reynald Chevalier

Jennifer Kipke

Patrik Müller

Christian Sidot

Valerie Garcia

Markus Schopf

Alexander Koeppl

Naka Seidel

Michael J WR Grace & Co Elder

The present invention relates to a process for recycling cyclopentadienyl derivatives of the formulae (I) and (I'), a process for preparing metallocenes of the formula (III) from cyclopentadienyl derivatives of the formulae (I) and (I&#x2032;) or from bridged biscyclopentadienyl derivatives of the formula (II), in which the cyclopentadienyl derivatives of the formulae (I), (I&#x2032;) or (II) which are used have been at least partly recovered and purified by means of liquid-solid chromatography, and the use of liquid-solid chromatography for purifying substituted, recovered cyclopentadienyl derivatives of the formulae (I), (I&#x2032;) or (II).

Process for recycling cyclopentadienyl derivatives and preparing metallocenes from recycled, substituted cyclopentadienyl derivatives

The present invention relates to catalyst systems for preparing isotactic polyolefins which are obtained by reacting at least one chiral coordination compound of a main group element selected from the group of elements consisting of Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb, Te, TI, Pb, Bi and Po as central atom and at least one cocatalyst which is able to convert the chiral coordination compound into a species which displays polymerization activity toward at least one olefin, with the chiral coordination compound comprising two bidentate chelating ligands joined to one another via a bridge and, optionally, one or two further monodentate ligands and with the four coordinating atoms of the two chelating ligands surrounding the main group element as central atom of the coordination compound in an approximately planar fashion and up to two further ligands being located above and below this approximately planar coordination sphere formed by the four coordinating atoms of the two chelating ligands and, in the case of two such further ligands, these being in trans positions relative to one another.

Polymerization catalysts, main group coordination compounds, process for preparing polyolefins and polyolefins

The present invention relates to organometallic transition metal compounds of the formula (I)ZAZMX&#x2003;&#x2003;(I)where

Transition metal compound, ligand system, catalyst system and process for preparing polyolefins

A catalyst system obtained by reacting at least one chiral transition metal compound and at least one cocatalyst, where the chiral transition metal compound is a transition metal compound of formula (Ia) or one of its enantiomers of the formula (Ia*), where

Polymerization catalysts, organic transition metal compounds, process for preparing polyolefins and polyolefins

The present invention relates to a process for preparing heterocyclic ketones of the formulae (I) and (la), by reacting a heterocyclic compound of the formula (II), with an &#x3b1;, &#x3b2;-unsaturated carboxylic acid of the formula (III), or with its anhydride of the formula (IV), where Ris hydrogen or a C-Ccarbon-containing group, Ris hydrogen or a C-Ccarbon-containing group, or Rand Rtogether form a cyclic ring system, Ris a C-Ccarbon-containing group and X is an element of the 16th group of the Periodic Table or is a divalent nitrogen group &#x2014;(N&#x2014;R)&#x2014;, where Ris an electron-withdrawing radical which is selected from the group consisting of perhalogenated C-Ccarbon-containing radicals and C-Corganosulfonyl groups.

Preparation of heterocyclic ketones

The present invention relates to organometallic transition metal compounds of the formula (I), a catalyst composition comprising at least one of the organometallic transition metal compound and an olefin polymerization process in the presence of one of the catalyst composition. 

Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins

A class of metallocene compounds is disclosed having general formula (I) wherein Y is a moiety of formula (II) wherein A, B, and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Periodic Table of the Elements (new IUPAC version), with the exclusion of nitrogen and oxygen; R , R , R , R and R are hydrogen or hydrocarbon groups, Z is selected from a moiety of formula (II) as described above and from a moiety of formula (III) wherein R , R , R and R , are hydrogen or hydrocarbon groups; L is a divalent bridging group; M is an atom of a transition metal selected from those belonging to group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table of the Elements (new IUPAC version), X, same or different, is hydrogen, a halogen, a R , OR , OSO CF , OCOR , SR , NR or PR group, wherein the substituents R are hydrogen or alkyl groups; p is an integer of from 1 to 3, being equal to the oxidation state of the metal M minus 2. The above metallocenes are particularly useful in the polymerization of propylene.

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Frankfurt-am-Main, Germany

Robert L Jones