Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Catalina L Coker

Jo Ann M Canich

Alexander Z Voskoboynikov

Alexey N Ryabov

Mikhail V Nikulin

Alexander V Lygin

Vyatcheslav V Izmer

Dmitry Vadimovich Uborsky

Andrey F Asachenko

Peijun Jiang

Margaret M Wu

John F Walzer, Jr

John F Walzer

Abhimanyu Onkar Patil

Donna Jean Crowther

Bruce Alan Harrington

Phillip Thomas Matsunaga

Jonathan Martin McConnachie

Kevin Bruce Stavens

Steven Paul Rucker

Madhav Acharya

Artyom Y Lebedev

Jiling Huang, Legal Representative

Alexey N Ryahov

Steven P Rucker

Alexey N Rayabov

Dimitry V Uborsky

A low viscosity poly(apha-olefin) (PAO) is produced by contacting one or more C3 to C24 alpha-olefins with an unbridged, substituted bis cyclopentadienyl transition metal compound, a non-coordinating anion activator, and an alkyl-aluminum compound. The molar ratio of transition metal compound to activator is 10:1 to 0.1:1, and the molar ratio of alkyl aluminum compound to transition metal compound is 1:4 to 4000:1. The transition metal compound has either (a) at least one non-isoolefin substitution on both cyclopentadienyl rings, or (b) at least two substitutions on at least one cyclopentadienyl ring. The PAO is comprised of at least 50 mole % of C3 to C24 alpha-olefins and has a kinematic viscosity at 100&#xb0; C. of 20 cSt or less.

Low viscosity poly-alpha-olefins

A process for producing a substituted metallocene compound comprises reacting a first compound with a transfer-agent, wherein the first compound comprises a complex of a transition metal atom selected from Group 3, 4, 5 or 6 of the Periodic Table of Elements, or a lanthanide metal atom, or actinide metal atom and at least one monocyclic or polycyclic ligand that is pi-bonded to M and is substituted with at least one halogen or sulfonate substituent and the transfer-agent comprises a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, silylcarbyl, or germylcarbyl radical capable of replacing said at least one halogen or sulfonate substituent of said first compound under reaction conditions.

Process for producing substituted metallocene compounds for olefin polymerization

This invention is directed to new mono-cyclopentadienyl ('mono-Cp') metallocene catalyst compounds useful for producing high viscosity PAOs with narrow molecular weight distribution and good shear stability. Specifically, this invention relates to a group of bridged mono-Cp catalysts wherein, in an embodiment of the invention, the aromatic ring structure is substituted with: 1) at least one phenyl group, 2) at least one alkyl group, and 3) at least one other group, such as a hydrocarbyl group, a heteroatom, or a heteroatom-containing group.

Catalysts for producing polyalpha-olefins and processes related thereto

Halogen substituted metallocene compounds are described and comprise one or more monocyclic or polycyclic ligands that are pi-bonded to the metal atom and include at least one halogen substituent directly bonded to an spcarbon atom at a bondable ring position of the ligand, wherein the or at least one ligand has one or more ring heteroatoms in its cyclic structure. When combined with a suitable activator, these compounds show activity in the polymerization of olefins, such as ethylene and propylene.

Halogen substituted heteroatom-containing metallocene compounds for olefin polymerization

A low viscosity poly(alpha-olefin) (PAO) is produced by contacting one or more C3 to C24 alpha-olefins with an unbridged, substituted bis-cyclopentadienyl transition metal compound, a non-coordinating anion activator, and an alkyl-aluminum compound. The molar ratio of transition metal compound to activator is 10:1 to 0.1:1 and the molar ratio of alkyl aluminum compound to transition metal compound is 1:4 to 4000:1. The transition metal compound has either (a) at least one non-isoolefin substitution on both cyclopentadienyl rings, or (b) at least two substitutions on at least one cyclopentadienyl ring. The PAO is comprised of at least 50 mole % of C3 to C24 alpha-olefins, has a Mw/Mn between 1 and 1.4, and a kinematic viscosity at 100&#xb0; C. of 20 cSt or less.

Process to produce low viscosity poly-alpha-olefins

This invention relates to processes to produce liquid poly-alpha-olefins (PAOs) having a kinematic viscosity at 100&#xb0; C. of more than 20 cSt in the presence of a metallocene catalyst with a non-coordinating anion activator and hydrogen.

Process to produce high viscosity fluids

A process for preparing a chelating ligand of the formula (II) from a chelating ligand of the formula (I) via an sp-spor sp-spcoupling reaction with an organometallic compound of the formula (III). wherein B is a bridging group that is bonded to Land Lin formula (I) and to Land Lin formula (II); Lis a substituted monocyclic or polycyclic ligand that comprises at least one chlorine, bromine, iodine, or sulfonate substituent, directly bonded to an spcarbon atom of the ring structure of the ligand; Lis a monoanionic ligand; or Lmay, independently, be defined as L; Lis the same group as L, but said at least one chlorine, bromine, iodine, or sulfonate substituent is replaced with a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl fragment; Lis the same group as L, though, when Lis defined as L, Lmay be the same as Lor L; Ris a hydrocarbyl, substituted hydrocarbyl, halocarbyl, or substituted halocarbyl; Mis an element of group 1, 2, 12, 13 or 14 of the Periodic Table of the Elements; each X, if present, is selected independently from the group consisting of halogen atoms, the hydroxyl group, alkoxy groups, aryloxy groups, mesylate, tosylate and triflate; r is 1, 2 or 3, and t is 0, 1 or 2, where r+t corresponds to the oxidation number of M.

Preparation of substituted bridged indenyl and related ligands

This invention relates to a transition metal compound represented by the formula: wherein

Heteroatom bridged metallocene compounds for olefin polymerization

The instant invention relates to a process to produce low sulfur diesel products through the hydrodesulfurization of low nitrogen diesel boiling range feedstreams in the presence of solid acidic materials.

Solid acid assisted deep desulfurization of diesel boiling range feeds

A metallocene compound is represented by the formula (1):AMXwherein M is a transition metal atom having a coordination number of n selected from Group 3, 4, 5 or 6 of the Periodic Table of Elements, or a lanthanide metal atom, or actinide metal atom; A is a substituted monocyclic or polycyclic arenyl ligand pi-bonded to M, wherein said arenyl ligand includes at least one halogen substituent directly bonded to any spcarbon atom at a bondable ring position of the ligand; and the or each X is a univalent anionic ligand, or two X are joined and bound to the metal atom to form a metallocycle ring, or two X are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand.

Halogen substituted metallocene compounds for olefin polymerization

A metallocene compound comprising a transition metal, a first substituted or unsubstituted indenyl or fluorenyl ligand pi&#x2014;bonded to the transition metal, a second monoanionic ligand bonded to the transition metal, and a divalent bridging group bonded to the indenyl ligand and said second monoanionic ligand, wherein said bridging group is connected to the four, five, six or seven position of the indenyl ligand or to the one, two, three, four, five, six, seven or eight position of the fluorenyl ligand, and wherein at least one of one of the first and second ligands comprises at least one halogen substituent directly bonded to any spcarbon atom at a bondable ring position of the ligand.

A metallocene compound is represented by the formula (1): wherein: M is a Group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom, preferably a Group 4 transition metal atom selected from titanium, zirconium or hafnium; E is a substituted or unsubstituted monocyclic or polycyclic arenyl ligand pi-bonded to M; A is a substituted or unsubstituted polycyclic arenyl ligand that is pi-bonded to M and has a different ring structure than the E ligand; at least one of the A and E ligands includes at least one halogen substituent directly bonded to an spcarbon at a bondable ring position; Y is a bridging group containing at least one Group 13, 14, 15, or 16 element and any single position of the ring structure of A and to any single position of the ring structure of E; and y is zero or 1, indicating the absence (y=0) or presence (y=1) of Y; and each X is a univalent anionic ligand, or two X are joined and bound to the metal atom to form a metallocycle ring, or two X are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand; provided that when E is an unsubstituted cyclopentadienyl ligand, either y is one or A is not 2-bromofluorenyl or 2,7-dibromofluorenyl.

Growing community of inventors

Baytown, TX, United States of America

Catalina L Coker