Chemtura Corporation

Crompton Gmbh

Vilan Kosover

Gerald J Abruscato

Brigitte Benage

Istvan Lippai

Jesus R Fabian

Jesus A Fabian

Daniel C Knowles

Frank J DeBlase

E Brian Fox

Susan Ferrarotti

Mitchel Cohn

The invention is directed to polyalphaolefins (PAOs) and processes for forming PAOs. In one embodiment, the invention is to a process for forming a PAO comprising polymerizing C-C&#x3b1;-olefin monomers in the presence of hydrogen, a C-Csaturated hydrocarbon, e.g., a C-Csaturated straight-chain hydrocarbon, and a catalyst system in a reaction vessel, wherein the C-Csaturated straight-chain hydrocarbon has about the same number of carbon atoms as the C-C&#x3b1;-olefin monomers. The C-Csaturated straight-chain hydrocarbon optionally is derived from a crude PAO product formed by the process of the invention. The invention is also directed to reaction systems for performing the processes of the invention, to processes for controlling PAO viscosity based on residence time, and to the removal of spent catalyst using a solid adsorbent particles.

Polyalphaolefins and processes for forming polyalphaolefins

A method for inhibiting the premature polymerization of styrenic monomers is disclosed wherein the method comprises adding to said monomers a combination of:

Means for controlling the exothermic reaction of styrenic monomers with sulfonic acids

Disclosed herein is a method for inhibiting and retarding the premature polymerization and the polymer growth of vinyl aromatic monomers wherein the method comprises adding to said monomers an effective amount of an inhibitor and retarder blend comprising:

Aromatic sulfonic acids, amines and nitrophenols in combination with nitroxyl radical-containing compounds or C-nitrosoanilines as polymerization inhibitors

Aromatic sulfonic acids, amines, and nitrophenols in combination with nitroxyl radical-containing compounds or C-nitrosanilines as polymerization inhibitors

Disclosed herein is a method for inhibiting and retarding the premature polymerization and the polymer growth of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor that is a sulfonated nitrophenol of the formula: wherein: R, R, and Rare independently selected from the group consisting of hydrogen, alkyl, NO, and SOH, provided that at least one of R, R, and Ris NOand at least one of R, R, and Ris SOH. In a preferred embodiment, at least one additional inhibitor selected from the group consisting of nitroxyl compounds, nitrosoanilines, nitrophenols, amines, and mixtures thereof is also added.

Sulfonated nitrophenols as polymerization inhibitors

A process for reducing the level of residual catalyst comprising one or more alkylhalide, alkoxyhalide, metal halide, metal oxyhalide, alkyl metal, alkoxy metal, boron compound and coordinated metal compound wherein the metal is a Group III, Group IV, Group V, Group VI and/or Group VIII metal, from a crude organic product (e.g., polyolefins, alkylated aromatic compounds, alkylated amines, etc.) comprising the residual catalyst is provided, the process comprising contacting the crude organic product with a solid adsorbent in an adsorbent system.

Growing community of inventors

Cheshire, CT, United States of America

Vilan Kosover