Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Nifant'ev; Ilya E.
Address:
Moscow, RU
No. of patents:
18
Patents:












Patent Number Title Of Patent Date Issued
8158733 Catalysts based on 2-(2-aryloxy)quinoline or 2-(2-aryloxy)dihydroquinoline ligands April 17, 2012
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a Group 4 metal complex that incorporates a dianionic, tridentate 2-(2-aryloxy)quinoline or 2-(2-aryloxy)dihydroquinoline ligand. In one aspect, supported catalysts are prepared by first
8153544 Method for preparing non-metallocene catalysts April 10, 2012
A method of preparing supported catalysts useful for olefin polymerization is described. The catalysts comprise a Group 4 metal complex that incorporates a tridentate dianionic ligand. An activator mixture is first made from a boron compound having Lewis acidity and an excess of an a
7858718 Catalysts based on 2-aryl-8-anilinoquinoline ligands December 28, 2010
Catalysts useful for polymerizing olefins are disclosed. The catalysts comprise an activator and a Group 4 metal complex that incorporates a dianionic, tridentate 2-aryl-8-anilinoquinoline ligand. In one aspect, supported catalysts are prepared by first combining a boron compound hav
7858717 Metallocene compounds December 28, 2010
A bridged metallocene compound of formula (I) ##STR00001## wherein: M is an atom of a transition metal selected from those belonging to group 3, 4, or to the lanthanide or actinide groups in the Periodic Table of the Elements; X, equal to or different from each other, is a hydrogen
7834205 Metallocene compounds November 16, 2010
A bridged metallocene compound of formula (I) ##STR00001## wherein: M is a transition metal; X, is a hydrogen atom, a halogen atom, or a hydrocarbon group optionally containing heteroatoms; L is a divalent bridging group; R.sup.1 is a linear C.sub.1-C.sub.40 hydrocarbon radical opti
7253292 Synthesis of cyclopentadiene derivatives August 7, 2007
A process for preparing cyclopentadiene derivatives comprising the steps of: a) coupling a five membered heterocycle ring with a five or six membered heterocycle ring; b) reacting the obtained compound with a carbonilating system: c) reducing the obtained compound.
7112638 Hetero cyclic metallocene compounds and use thereof in catalyst system for producing olefin poly September 26, 2006
##STR00001## A metallocene compound of general formula (I): LGZMXp, wherein L is a divalent group, Z is a moiety of formula (II), wherein R.sup.3 and R.sup.4 are selected from hydrogen and hydrocarbon groups; A and B are selected from S, O or CR.sup.5, wherein R.sup.5 is selected fr
6930190 Process for the preparation of heterocyclic pentalene derivatives August 16, 2005
A process for preparing heterocyclic pentalene derivative having formula (I): wherein w is a sulfur atom (S), an oxygen atom (O) or a NR or PR group, wherein R is an hydrocarbon group; R.sup.1, R.sup.2, R.sup.3, and R.sup.4, equal to or different from each other, are hydrogen atoms or
6864333 Process for the preparation of ethylene polymers March 8, 2005
Ethylene based polymers having high molecular weights can be obtained in high yields at temperatures of industrial interest, by carrying out the polymerization reaction in the presence of catalysts comprising single carbon bridged metallocenes, which has a particular ligand system co
6730754 Process for producing substantially amorphous propylene-based polymers May 4, 2004
A process for producing substantially amorphous propylene (co)polymers, comprising contacting propylene optionally in the presence of one or more olefins under polymerization conditions with a catalyst system comprising: A) a half sandwich titanium complex wherein the cyclopentadienyl is
6518386 Metallocene compounds, process for their preparation thereof, and their use in catalysts for the February 11, 2003
A class of metallocene compounds having two cyclopentadienyl rings bridged by an alkylidene group is disclosed. These metallocene compounds can be suitably used as catalyst components for the polymerization of olefins. In particular, by polymerising propylene in the presence of a catalys
6451724 Metallocenes and catalysts for olefin-polymerisation September 17, 2002
A class of metallocenes of formula (I): (ZR.sup.1.sub.m).sub.n (Cp)(A).sub.r ML.sub.p L'.sub.q (I) wherein (ZR.sup.1.sub.m).sub.n, is a divalent group bridging Cp and A, Cp is a heterocyclic cyclopentadienyl group of formula (II) or (II'), wherein one of X or Y is a single bond, the
6388118 Process for the preparation of cyclopentadienyl compounds and compounds obtained therefrom May 14, 2002
A process is disclosed for preparing bis-cyclopentadienyl compounds bridged by a single carbon atom by reacting a carbonyl compound with a cyclopentadienyl compound in the presence of a base and of an oxygen-containing solvent having an atomic ratio carbon/oxygen not higher than 3. T
6369254 Bridged metallocene compounds, processes for the preparation thereof and use thereof in catalyst April 9, 2002
Metallocene compounds with two indenyl-type ligands linked in the 4 position by means of a divalent bridging group can be suitably used as components of catalysts for the polymerization of olefins. In particular, it is possible to prepare saturated or unsaturated elastomeric copolymers
6271411 Process for preparing 2-aryl-substituted indenes August 7, 2001
A process is disclosed for preparing 2-aryl-substituted indenes by reacting an indene with an arene compound substituted with an halogen atom, preferably a iodine atom, or with an organosulphonate group, said reaction being carried out in a basic medium in the presence of a palladium
6051728 Metallocene compounds, process for their preparation, and their use in catalysts for the polymer April 18, 2000
A class of metallocene compounds having two substituted cyclopentadienyl rings bridged by an alkylidene group wherein the cyclopentadienyl groups can be indenyl groups. The metallocene compounds have the following structures: ##STR1## The metallocenes are characterized by three p
6043403 Process for the preparation of cyclopentadienyl compounds and compounds obtained therefrom March 28, 2000
A process is disclosed for preparing bis-cyclopentadienyl compounds bridged by a single carbon atom by reacting a carbonyl compound with a cyclopentadienyl compound in the presence of a base and of an oxygen-containing solvent having an atomic ratio carbon/oxygen not higher than 3. T
5968863 Process for the preparation of bridged metallocenes October 19, 1999
It is possible to prepare in high yield and purity the racemic and meso forms of bridged chiral metallocenes with a stereoselective method, by synthesizing the sylil-, germyl- or stannyl-substituted ligands. These compounds can be prepared in their racemic and meso forms, and then se










 
 
  Recently Added Patents
Method and system for detecting data modification within computing device
Robot control device
Adjustable voltage regulator with dynamic voltage compensation
Intermediate film for laminated glasses, and laminated glass
Systems, methods and apparatus for payment processing
Image stabilization apparatus and image pickup apparatus
Reflective non-invasive sensor
  Randomly Featured Patents
Foldable saw
N-phenylsulfonyl-N'-triazinylureas as herbicides and plant growth regulants
Antimicrobial oxazolidine/iodopropynyl-butyl carbamate composition containing less than 0.1wt% free formaldehyde
Combined chest of drawers and changing unit
Method of fabricating an electrical terminal connector
Gray scale drive sequences for pulse width modulated displays
Semi-transparent reflective hologram and method of producing same
Scroll compressor with liquid injection
AZT immunoassays, derivatives, conjugates and antibodies
Variable stretch composites and methods of making the composite