Chemtura Corporation

Crompton Gmbh

Jesus R Fabian

Daniel C Knowles

Vilan Kosover

Gerald J Abruscato

Brigitte Benage

Frank J DeBlase

E Brian Fox

Susan Ferrarotti

Vilen Vilan Kosover

Gan Wang

Istvan Lippai

Mitchel Cohn

Anthony Vincent Gentile

Angela M Edwards

Vilen Kosover

Gerald J Abrucscato

Frank Deblase

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 final polymer product is formed using a two-stage process and system. In the first stage, a catalyst system is used to polymerize an alpha-olefin monomer to form an effluent. In the second stage, additional alpha-olefin monomer is supplied and is polymerized in the presence of the effluent from the first stage. The second stage produces the final polymer product, which may have a lower molecular weight and viscosity than the polymer formed in the first stage. The final polymer product may be used as a base stock for lubricant compositions.

Two-stage process and system for forming high viscosity polyalphaolefins

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

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.

Process for removal of residual catalyst components

Inhibition of polymerization of unsaturated monomers

Growing community of inventors

Wethersfield, CT, United States of America

Jesus R Fabian