A catalyst system including the product of the combination of an unbridged Group 4 metallocene compound and a 2,6-bis(imino)pyridyl iron complex is provided. A process for the polymerization of monomers (such as olefin monomers) and a polymer produced therefrom are also provided.

A catalyst for the hydroformylation of at least one olefin, having a ligand fo the general formula (1)R.sup.1, R.sup.2, R.sup.3 selected from the group including substituted and non-substituted alkyl, substituted and non-substituted aryl, substituted and non-substituted alkenyl, substituted and non-substituted alkinyl, substituted and non-substituted cycloalkyl, and substituted and non-substituted heterocycles, wherein R.sup.1, R.sup.2 and R.sup.3 can each be the same or different, L is selected from a group having a sandwich complex, an oxygen group, substituted and non-substituted alkylene or heterocycles, and substituted aryl or heteroaryl; and aryl and heteroaryl is each substituted with groups which contain at least two heteroatoms and are coupled to the Si via the at least two heteroatoms of the substituents, n=1-10, preferably 1-5, particularly preferably 1, 2, or 3; and the ligand is coupled to the metal M from the group VIIIb of the periodic table of elements via the Si group.

The disclosure provides a catalyst system and a method for ethylene oligomerization using this. The catalyst system contains: ligand a, containing carbene groups of imidazole ring type; transition metal compound b, that is one of IVBVIII group metal compounds; activator c, that is a compound containing III A group metals; the ligand a contains at least one group as shown in general formula I:

##STR00001##

in which, bridging group A contains a main chain including alkyl, alkenyl, aryl groups or the combination of them and the first heteratom; E is a linear or cyclic group containing the second heteroatom; R is a hydrocarbyl group. The catalyst system is especially used for trimerization and tetramerization of ethylene. The catalyst system has high selectivity for 1-hexene and 1-octene, low selectivity for 1-butene and I-C.sub.10+, and the total percent content of C.sub.6C.sub.8 linear -olefin in the product is more than 90% by mass.

A resin composition includes: (a) a supported platinum catalyst having a structure shown by the following general formula (1) in which a platinum complex is supported on a surface of an inorganic oxide; and (b) a thermoplastic matrix resin. The resin composition is usable as an addition-reaction catalyst capable of imparting sufficient storability and quick curability to an addition-reaction curable composition.

##STR00001##

In the formula, L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound, and an isocyanide compound; and n represents the number of Ls and an integer from 0 to 2.

Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins.

The disclosure relates to a process for obtaining alpha-olefins by heterogeneous catalytic ethenolysis of optionally-functionalized unsaturated, in particular mono-unsaturated, olefins. The disclosure also relates to new supported catalysts that can be used in the process and to a method for preparing the supported catalysts.

A catalyst system is provided which comprises a solid support material having, on its surface, one or more catalytic transition metal complex wherein the solid support material comprises SiO.sub.2@AMO-LDH microspheres having the formula I: (i) wherein, M.sup.z+ and M.sup.y+ are two different charged metal cations; z=1 or 2; y=3 or 4; 0<x<0.9; b is 0 to 10; c is 0.01 to 10, preferably >0.01 and <10; p>0 q>0; X.sup.n? is an anion with n>0, preferably 1?5a=z(1?x)+xy?2; and the AMO-solvent is an 100% aqueous miscible organic solvent. Preferably, M in the formula I is Al. Preferably, M in the formula I is Li, Mg or Ca. The catalyst system has use in the polymerization and/or copolymerization of at least one olefin to produce a homopolymer and/or copolymer.

A metal complex represented by the following Formula (1): ##STR00001##
(wherein M represents palladium or platinum; L represents a ligand selected from carbon monoxide, an olefin compound, an amine compound, a phosphine compound, an N-heterocyclic carbene compound, a nitrile compound and an isocyanide compound; n represents an integer of 0 to 2 showing the number of the ligand; and each of R.sup.1 to R.sup.4 represents an organic group). The metal complex described above can be fixed on an inorganic oxide while maintaining a skeletal structure thereof to obtain a supported metal complex, and this makes it possible to allow the supported metal complex to maintain the same catalytic activity as that of the original metal complex. Also, calcining the supported metal complex obtained in the manner described above makes it possible to obtain a supported metal catalyst which is improved in catalytic activity to a greater extent than conventional supported metal catalysts.

A process can prepare an isocyanurate compound by hydrosilylation. The compound is a tris[3-(trialkoxysily)propyl] isocyanurate, a tris[3-(alkyldialkoxysilyl)propyl] isocyanurate, and/or a tris[3-(dialkylalkoxysilyl)propyl] isocyanurate. The process includes (A) preparing a mixture of at least one carboxylic acid, a platinum catalyst, and 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione; (B) heating the mixture to a temperature in the range of 40 to 140 C.; (C) adding at least one H-silane among a hydrotrialkoxysilane, a hydroalkyldialkoxysilane, and a hydrodialkylalkoxysilane to the mixture; (D) adding at least one alcohol to the mixture prepared in step (C); and (E) isolating the isocyanurate compound.

The invention relates to a process for the metathesis of olefins implemented with a catalyst comprising a mesoporous matrix and at least the elements molybdenum and silicon, said elements being incorporated into said matrix by means of at least one precursor comprising molybdenum and silicon and having at least one sequence of SiOMo bonds.