Abstract:
A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having catalytic amounts of the following components: a Group VIII B metal source; a combination of inorganic co-catalysts including a copper source and at least one of a titanium source or a zirconium source; an onium chloride composition; and a base. Alternative embodiments include inorganic co-catalyst combinations of a lead source and at least one of a titanium source or a manganese source.
Abstract:
The present invention provides catalyst systems useful in the polymerization of olefins comprising a transition metal component and a ligand component comprising a Nitrogen atom and/or functional groups comprising a Nitrogen atom, generally in the form of an imine functional group. In certain embodiments, the ligand component may further comprise a phosphorous atom. Preferred ligand components are bidentate (bind to the transition metal at two or more sites) and include a nitrogen-transition metal bond from two imine groups. The transition metal-ligand complex is generally cationic and associated with a weakly coordinating anion. In a preferred embodiment, the catalyst system of the present invention further comprises a Lewis or Bronsted acid complexed with the ligand component of the transition metal-ligand complex.
Abstract:
A method and catalyst system for producing aromatic carbonates from aromatic hydroxy compounds. In one embodiment, the method includes the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation catalyst system having catalytic amounts of the following components: a Group VIII B metal source; an alkaline metal chloride; a polyether; and a base. Alternative embodiments substitute a catalytic amount of a nitrile promoter for the polyether.
Abstract:
Double-metal cyanide catalysts of the formula M1a[M2(CN)b(A)c]d. fM1gXn. h (H2O). eL, where M1 is a metal ion selected from the group consisting of Zn2+, Fe2+, Co3+, Ni2+, Mn2+, Co2+, Sn2+, Pb2+, Mo4+, Mo6+, Al3+, V4+, V5+, Sr2+, W4+, W6+, Cr2+, Cr3+ and Cd2+, M2 is a metal ion selected from the group consisting of Fe2+, Fe3+, Co2+, Co3+, Mn2+, Mn3+, V4+, V5+, Cr2+, Cr3+, Rh3+, Ru2+ and Ir3+ and M1 and M2 are identical or different, A is an anion selected from the group consisting of halide, hydroxide, sulfate, carbonate, cyanide, thiocyanate, isocyanate, cyanate, carboxylate, oxalate and nitrate, X is an anion selected from the group consisting of halide, hydroxide, sulfate, carbonate, cyanide, thiocyanate, isocyanate, cyanate, carboxylate, oxalate and nitrate, L is a water-miscible ligand selected from the group consisting of alcohols, aldehydes, ketones, ethers, polyethers, esters, ureas, amides, nitriles and sulfides, a, b, c, d, g and n are selected so as to make the compound electrically neutral, and e denotes the coordination number of the ligand, e and f denote fractions or integers greater than or equal to zero, h denotes a fraction or integer greater than or equal to zero, wherein the double-metal cyanides have been applied to or incorporated into solid, inert, unfoamed supports or have been shaped to give moldings.
Abstract:
Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a metal from Groups 8-10 of the Periodic Table having an atomic number of at least 44, preferably palladium; an alkali metal or alkaline earth metal halide, preferably sodium bromide; at least one carboxylic acid amide such as N-methylpyrrolidone or dimethylacetamide; and a cocatalyst which is a compound of one or more metals including copper, titanium, zinc, lead, cerium and manganese.
Abstract:
This invention is a solution process for the preparation of high molecular weight ethylene copolymers comprising contacting olefin monomers, with a catalyst system at a polymerization temperature at or above about 80° C. with a catalyst system comprising an unbridged Group 4 metal compound having a monocyclopentadienyl ligand, a phosphinimine ligand and at least one uninegative, activation reactive ligand. The process can be practiced at a reaction temperature of at least 80° C. to obtain high number average molecular weight polymer.
Abstract:
A catalyst system comprising the product resulting from the combination of a metallocene having a monoorganoamide radical attached to the metal of the metallocene and a cocatalyst having alkylaluminum groups and the use of such catalyst systems in the polymerization of olefin.
Abstract:
A catalyst for trimerization of ethylene is disclosed which comprises (a) a chromium complex having a neutral multidentate ligand having a tripod structure, represented by the formula, ACrJnQ3-n wherein A is a neutral multidentate ligand having a tripod structure, J is a carbonyl ligand or halogen, n is an integer of 0-3, and Q is at least one member selected from hydrogen, a C1-C10 hydrocarbon group, a C1-C10 carboxylate group, a C3-C10 diketonato group, an amide group, an imide group, an C1-C10 alkoxide group, a C1-C10 thioalkoxide group, an C6-C15 arene ligand, an C2-C10 alkene ligand, an C2-C15 alkyne ligand, an amine ligand, an imine ligand, an isonitrile ligand, a phosphine ligand, a phosphine oxide ligand, a phosphite ligand, an ether ligand, a sulfide ligand, a sulfone ligand and a sulfoxide ligand, and (b) a metal alkyl compound. The catalyst optionally further comprises (c) at least one compound selected from aromatic tertiary amine compounds, except for an imine, and nitrogen-containing heterocyclic compounds, and (d) a radical anion compound.
Abstract:
This invention provides a novel diphosphine compound which is useful as a ligand of catalysts for asymmetric synthesis reactions, particularly asymmetric hydrogenation reaction. Particularly, it provides a diphosphine compound represented by a general formula (1): wherein R1 and R2 each independently represents a cycloalkyl group, an unsubstituted or substituted phenyl group or a five-membered aromatic heterocycle residue.
Abstract:
The invention relates to process for preparing monofunctional, bifunctional or/and polyfunctional olefins of the formulae (Ia), (Ib), (Ic) or/and (Id), where R1 to R3 are, independently of one another, hydrogen, (C1-C8)-alkyl, CN, COOH, COO-alkyl-(C1-C8), CO-alkyl-(C1-C8), aryl-(C6-C10), COO-aryl-(C6-C10), CO-aryl-(C6-C10), O-alkyl-(C1-C8), O—CO-alkyl-(C1-C8) or N-alkyl2-(C1-C8) and aryl is an aromatic radical containing up to 14 carbon atoms, where aryl is as defined above, and Ar is a heteroaromatic, by reacting haloaromatics, haloolefins or/and heterohaloaromatics of the formulae (IIa), (IIb), (IIc) or/and (IId) with olefins of the formula (III), wherein a mixture of a palladium(0) complex or a palladium(II) salt with phosphite ligands of the formulae (IVa) or/and (IVb) is used as catalyst.