Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Exxon Mobil Chemical, Inc.

Gary L Casty

Gabor Kiss

James Richardson Lattner

Patrick Brant

George Rodriguez

Stuart Leon Soled

Peijun Jiang

James C Vartuli

Jo Ann M Canich

Karl Gottlieb Strohmaier

Sabato Miseo

Alexander Z Voskoboynikov

Jack Wayne Johnson

Andrzej Malek

Richard B Hall

Joseph Ernest Baumgartner

Smita Kacker

Sebastian Carmen Reyes

Christine Esther Kliewer

Robert Patrick Reynolds, Jr

Robert P Reynolds

Raymond A Cook

Jennifer Schaefer Feeley

Steven T Ragomo

Chris B Friedersdorf

Jeffrey M Dysard

Robert R Simpson

Steven L Hegwood

Murielle V Scott

Andrzel Malek

Evan J Piland

Kiss Gabor

James Clarke Vartuli

A method for the preparation of olefin polymerization catalysts that are the reaction products of the catalytic reaction of surface hydroxyls of a support with a trialkyl silane to afford hydrogen and the corresponding surface bound alkyl silyl ether and at the same time with a strong Lewis acid which support is converted to a silica bound anion that in a second step is fully converted by reaction with QMto the desired catalyst. Catalyst compositions are disclosed herein. Processes disclosed herein include processes for the polymerization of olefinically unsaturated monomers comprising contacting a plurality of one or more of the monomers with the catalyst.

Preparation of supported silyl-capped silica-bound anion activators and associated catalysts

Processes for polymerizing propylene. About 40 wt % to about 80 wt % propylene monomer, based on total weight of propylene monomer and diluent, and about 20 wt % to about 60 wt % diluent, based on total weight of propylene monomer and diluent, can be fed into a reactor. The propylene monomer can be polymerized in the presence of a metallocene catalyst and an activator within the reactor at a temperature of about 80&#xb0; C. or more and a pressure of about 13 MPa or more to produce a polymer product in a homogenous system. About 20 wt % to about 76 wt % (preferably About 28 wt % to about 76 wt %) propylene monomer, based on total weight of the propylene monomer, diluent, and polymer product, can be present at the reactor exit at steady state conditions.

Super-solution homogeneous propylene polymerization

This invention relates to a process to polymerize olefins comprising contacting propylene, at a temperature of 65&#xb0; C. to 150&#xb0; C. and a pressure of 1.72 to 34.5 MPa, with: 1) a catalyst system comprising one or more activators and one or more nonmetallocene metal-centered, heteroaryl ligand catalyst compounds, where the metal is chosen from the Group 4, 5, 6, the lanthanide series, or the actinide series of the Periodic Table of the Elements, 2) optionally one or more comonomers selected from ethylene and C4 to C12 olefins, 3) diluent or solvent, and 4) optionally scavenger, wherein: a) the olefin monomers and any comonomers are present in the polymerization system at 30 wt % or more, b) the propylene is present in the feed at 80 wt % or more, c) the polymerization occurs at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure greater than 1 MPa below the cloud point pressure of the polymerization system, and d) the polymerization occurs: (1) at a temperature below the critical temperature of the polymerization system, or (preferably and) (2) at a pressure below the critical pressure of the polymerization system.

Polymer production at supersolution conditions

In a process for producing a propylene-based olefin homopolymer or copolymer, a monomer composition comprising propylene is contacted with a polymerization catalyst system under homogeneous polymerization conditions (such as solution, supersolution or supercritical conditions), wherein the polymerization catalyst system includes an activator and a bridged bis-indenyl transition metal (group 4) compound substituted with a carbazole (unsubstituted or substituted) at the 4 position.

Production of propylene-based polymers

A process for polymerizing propylene is provided. The process comprises contacting propylene and optionally one or more monomers with a catalyst system comprising a bis-indenyl Group 4 metallocene compound supported on silica, the silica treated with one or more organoaluminum compounds and one or more heterocyclic compounds, under slurry conditions in the presence of hydrogen at a temperature of about 50&#xb0; C. to about 160&#xb0; C. and a pressure of from about 3 MPa to about 5 MPa to provide a catalyst activity of greater than 30,000 pounds of product per pound of catalyst; and then recovering isotactic polypropylene having a melt flow rate of 20 dg/min or less as measured according to ASTM D-1238 at 230&#xb0; C. and 2.16 kg.

Preparation of polymerization catalyst activators utilizing indole-modified silica supports

The present invention is directed to processes for preparing supported metal catalysts comprising one or more catalytically active metals applied to a porous catalyst support and to processes that use such catalysts. The process requires the formation of an organic complex during the manufacture of the catalyst which after its formation is either partially or fully decomposed before reduction if the metal to form the catalyst. The catalysts have high levels of metal dispersion and uniform distribution of catalytically active metals on the support. The catalysts obtained form the processes are particularly effective in catalysing Fischer-Tropsch reactions and as adsorbants for the removal or organosulfur compounds from hydrocarbons.

Methods for preparing catalysts

This invention relates to supported activators comprising the product of the combination of an ion-exchange layered silicate, an organoaluminum compound, and a heterocyclic compound, which may be substituted or unsubstituted. This invention further relates to catalyst systems comprising catalyst compounds and such activators, as well as processes to polymerize unsaturated monomers using the supported activators. For the purposes of this patent specification and the claims thereto, the term 'activator' is used interchangeably with the term 'co-catalyst', the term &#x201c;catalyst&#x201d; refers to a metal compound that when combined with an activator polymerizes olefins, and the term &#x201c;catalyst system&#x201d; refers to the combination of a catalyst and an activator with or without a support. The terms &#x201c;support&#x201d; or &#x201c;carrier&#x201d;, for purposes of this patent specification, are used interchangeably and are any ion-exchange layered silicates.

Supported activator

In a process for selectively separating 1-butene from a Cfeed stream comprising at least 1-butene, cis-2-butene and trans-2-butene, the feed stream is passed through a first bed of an adsorbent comprising a crystalline microporous material to form a substantially trans-2-butene-free effluent stream. Then, the substantially trans-2-butene-free effluent stream is passed through a second bed of an adsorbent comprising a crystalline microporous material to form a substantially 1-butene-free effluent stream, whereby the 1-butene is separated from the feed stream. The adsorbed 1-butene is then typically desorbed from the second adsorbent bed either by lowering the pressure or raising the temperature of the bed.

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Easton, PA, United States of America

Gary L Casty