Abstract:
A novel catalyst for olefin polymerization is provided which comprises [A] a metallocene compound containing a transition metal selected from Groups 3, 4, 5, and 6 of Periodic Table, [B] a reaction product of topotactic reduction by electron transfer, and [C] an organoaluminum compound. The catalyst may contain additionally [D] an organoalkaline earth metal compound or an organozinc compound. This catalyst has high catalytic activity for olefin polymerization without employing an expensive catalyst component.
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:
Disclosed is a novel transition metal composition of a metaracycle structure represented by the formula wherein M1 is an element of Group IVB in the Periodic Table, M2 is an element of Group IIIA in the Periodic Table, R1 and R2 each are for instance a cyclopentadienyl group, R3 and R4 each are for instance a hydrocarbon group, R5 and R6 each are a hydrogen atom and R7 and R8 indicate an indan ring formed by bonding to each other.
Abstract translation:本发明公开了一种新型的由马来酰亚胺基的化学式表示的过渡金属组合物,M1是元素周期表IVB族的元素,M2是元素周期表IIIA族的元素,R1和R2分别为环戊二烯基, R 3和R 4各自为例如烃基,R 5和R 6各自为氢原子,R 7和R 8表示通过彼此键合形成的茚满环。
Abstract:
The present invention describes methods of making a series of amine-containing organic compounds which are used as ligands for group 3-10 and lanthanide metal compounds. The ligands have electron-withdrawing groups bonded to them. The metal compounds, when combined with a cocatalyst, are catalysts for the polymerization of olefins.
Abstract:
An ethylene polymerization catalyst and catalyst system which provides an ethylene copolymer which is characterized by desirable ER shift values. The high level ER shift of these polymers produce films having high impact strength. The catalyst is prepared by treating a support material with an agent selected from the group consisting of a compound having the structural formula BX53, where X5 is fluorine, chlorine, bromine, iodine or OR5, where R5 is C1-C6 alkyl; a compound having the structural formula X62 where X6 is fluorine, bromine or iodine; a compound having the structural formula NR6, where R6 is C1-C6 alkyl or OR7, where R7 is C1-C8 alkyl; and a compound having the structural formula Ti(OR8)4, where R8 is C1-C6 alkyl or phenyl to reduced surface hydroxyl group concentration of the support material. The thus treated support material is thereupon contacted with a dialkylmagnesium compound or complex, an alcohol compound or a silane compound and a transition metal compound, in that order. Alternatively, the sequence of contact of the transition metal compound and the silane compound may be reversed, as may be the sequence of addition of the dialkylmagnesium compound or complex and the silane compound.
Abstract:
Particulate magnesium ethoxide having a high coarse particle content can be obtained in a simple and economical manner by the present invention, which provides a process for preparing particulate magnesium ethoxide having a coarse grain content, and includes reacting metallic, optionally activated, magnesium with liquid ethanol under pressure at a temperature above 78° C. The present invention also relates to particulate magnesium ethoxide having a coarse grain content, which contains: 500 &mgr;m.
Abstract:
A composite catalyst for decomposing an organohalogen compound of the present invention, comprises composite particles comprising: iron compound particles having an average particle size of 0.01 to 2.0 &mgr;m, a phosphorus content of not more than 0.02% by weight based on the weight of the particles, a sulfur content of not more than 0.3% by weight based on the weight of the particles, and a sodium content of not more than 0.3% by weight based on the weight of the particles; and an amine compound, said composite catalyst having a catalytic activity capable of decomposing not less than 50% by weight of monochlorobenzene when 50 mg of a mixture comprising iron oxide particles obtained by heat-treating said iron compound particles at a temperature of 300° C. for 60 minutes in air, and the amine compound, is instantaneously contacted with 5.0×10−7 mol of monochlorobenzene at a temperature of 300° C. at a space velocity of 150,000 h−1 in an inert gas atmosphere using a pulse catalytic reactor.
Abstract:
Boratabenzene cocatalysts, especially novel pentafluorophenyl boratabenzenes, are useful cocatalysts or activators with metallocenes. They are less expensive than prior art activators, are soluble and offer more irreversible reactions. Compositions comprise at least one metallocene catalyst and at least one dihydroboratabenzene or anion thereof. Processes include polymerizations with metallocenes in the presence of a boratabenzene cocatalyst.
Abstract:
The present invention relates, inter alia, to methodologies for the synthesis, screening and characterization of organometailic compounds and catalysts (e.g., homogeneous catalysts). The methods of the present invention provide for the combinatorial synthesis, screening and characterization of libraries of supported and unsupported organometallic compounds and catalysts (e.g., homogeneous catalysts). The methods of the present invention can be applied to the preparation and screening of large niumbers of organometallic compounds which can be used not only as catalysts (e.g., homogeneous catalysts), but also as additives and therapeutic agents.
Abstract:
A method of making a vanadium phosphorus oxide (VPO) catalyst by precipitating from a 45-65 g/l solution of V4+ ions and V5+ ions a vanadium- and phosphorus-containing precipitate comprising a complex of formula VOHPO4. The precipitate is calcined under an inert atmosphere to produce a VPO catalyst whole active phase is formula (VO)2P2O9. Said solution comprises cations of at least two of Bi, Zr, Cr, Ce, Co, Mn, Mg and Mo such that the precipitate comprises 1-25% by mass of said dopant metal cations in total, the balance being said complex. Each dopant metal forms 0.1-20% by mass of the precipitate.
Abstract translation:一种通过从45-65g / l的V4 +离子和V5 +离子溶液中沉淀含钒和磷的沉淀物制备钒磷氧化物(VPO)催化剂的方法,该方法包括式VOHPO4的络合物。 将沉淀物在惰性气氛下煅烧以产生VPO催化剂,整个活性相为式(VO)2 P 2 O 9。 所述溶液包含Bi,Zr,Cr,Ce,Co,Mn,Mg和Mo中的至少两种的阳离子,使得沉淀物总共包含1-25质量%的所述掺杂金属阳离子,余量为所述络合物。 每种掺杂剂金属形成0.1-20质量%的沉淀物。