Abstract:
The present invention relates to a catalyst composition for polymerising olefin monomers to polyolefins comprising a catalyst component and a first additive component. The first additive component is a fossil and may for example be obtained from coal.
Abstract:
The present invention relates to a catalyst composition for polymerising olefin monomers to polyolefins comprising a catalyst component and a first additive component. The first additive component is a fossil and may for example be obtained from coal.
Abstract:
The invention relates to particles comprises of organopolysiloxane microgel particles having a diameter of 5 to 200 nm and organo-aluminum compounds immobilized thereon. The particles can be used as cocatalysts together with metal compounds of the 4, 5, 6 and 8-10 sub-groups of the periodic table for oligomerization, cyclization of polymerization of olefins.
Abstract:
A method of making a heterogenously supported catalyst useful in dimerization, oligomerization or polymerization is provided in which a catalyst precursor containing a metal and an aromatic group are alkylated onto an oligomeric support having at least one terminal unsaturated group by Friedel Crafts alkylation.
Abstract:
A catalyst comprising a 1) complex comprising: a) at least one metal selected from the group consisting of Group 8 metals, Group 9 metals, Group 10 metals, and combinations thereof, b) a compound having the formula R3X wherein R is selected from the group consisting of hydrogen, an alkyl, an alkenyl, an alkynyl, cycloalkyls, cycloalkenyls, cycloalkynyls, aryls, substituted aryls, and substituted organic compounds and wherein X is a Group 15 element selected from the group consisting of nitrogen, phosphorus, arsenic, antimony and bismuth; and 2) support component comprising a silicon-containing compound and a method of making said catalyst, is disclosed. The catalyst is then used to dehydrogenate hydrocarbons in a dehydrogenation reaction zone under dehydrogenation reaction conditions.
Abstract:
A method of making a heterogenously supported catalyst useful in dimerization, oligomerization or polymerization is provided in which a catalyst precursor containing a metal and an aromatic group are alkylated onto an oligomeric support having at least one terminal unsaturated group by Friedel Crafts alkylation.
Abstract:
A method of making a heterogenously supported catalyst useful in dimerization, oligomerization or polymerization is provided in which a catalyst precursor containing a metal and an aromatic group are alkylated onto an oligomeric support having at least one terminal unsaturated group by Friedel Crafts alkylation.
Abstract:
A method of making a heterogenously supported catalyst useful in dimerization, oligomerization or polymerization is provided in which a catalyst precursor containing a metal and an aromatic group are alkylated onto an oligomeric support having at least one terminal unsaturated group by Friedel Crafts alkylation.
Abstract:
The invention relates to a multinuclear metallocene catalyst of general formula (1); wherein Y and Y′ are the same or different and independently selected from a C1-20 linear hydrocarbyl group; C1-20 branched hydrocarbyl group; C1-20 cyclic hydrocarbyl group; a C1-30 aryl group and a C1-30 substituted aryl group; L and L′ are the same or different and each is an electron-donating group independently selected from the elements of Group 15 of the Periodic Table; Q and Q′ are the same or different and independently selected from hydrogen, a C1-30 alkyl group and a C1-30 aryl group; M″ is a metal selected from Group 3, 4, 5, 6, 7, 8, 9 and 10 elements and from lanthanide series elements of the Periodic Table; Z is selected from the group consisting of hydrogen; a halogen element; a C1-20 hydrocarbyl group; C1-20 alkoxy group and a C1-20 aryloxy group; B and B′ are the same or different and each is a half sandwich metallocene compound, with B being represented by Formula 2 and B′ being represented by Formula 3: W-M-Xx (Formula 2), W′-M′-X′x′, (Formula 3) wherein: W and W′ are the same or different and independently a ligand compound having a cyclo pentadienyl skeleton selected from the group consisting of cyclopentadienyl, substituted cyclopentadienyl, indenyl, substituted indenyl, fluorenyl and substituted fluorenyl; M and M′ are the same and each is independently selected from the group consisting of scandium; yttrium; lanthanoid series elements; titanium; zirconium; hafnium; vanadium; niobium; and tantalum; X and X′ are the same or different and each is selected from the group consisting of hydrogen; a halogen element; a C 1-20 hydrocarbyl group, C1-20 alkoxy group; and C1-20 aryloxy group; x and x′ are independently integers from 0 to 3; z is an integer from 1 to 5; n, n′ are independently 0 or 1, with 1≦(n+n′)≦2. The invention further relates to a method to prepare said multinuclear metallocene catalyst compound. The invention further relates to a catalyst system and to a process for the polymerisation of olefins.
Abstract:
Multinuclear catalyst complex comprising two or more active metal centres and at least one phenoxyimine compound and at least one substituted cyclopentadienyl, indenyl or fluorenyl derivative, each phenoxyimine compound being bonded to a cyclopentadienyl, indenyl or fluorenyl derivative forming a ligand framework, the cyclopentadienyl, indenyl or fluorenyl derivative being coordinated with one of the metal centres and the phenoxyimine compound being coordinated with an active metal centre other than the metal centre the cyclopentadienyl, indenyl or fluorenyl derivative is coordinated with, and wherein the phenoxyimine compound has the formula wherein R1 is hydrogen, alkyl, cycloalkyl, aryl or aralkyl; R2 is hydrogen, halogen, alkyl, cycloalkyl, aryl, O-alkyl or aralkyl; and R3 is alkyl, cycloalkyl, aryl or aralkyl, process for preparing a multinuclear catalyst composition comprising the steps of bonding a substituted phenoxyimine compound to a substituted cyclopentadienyl, indenyl or fluorenyl derivative to obtain a ligand framework and reacting at least one ligand framework with an active metal component and process for the polymerization of olefins, in particular of ethylene and optionally one or more other a-olefins, wherein said multinuclear catalyst is applied.