Albemarle Corporation

Ethyl Corporation

Albermarle Corporation

The University of Southern Mississippi

Si Group, Inc.

Albemarle Corportion

Line-x LLC

Mahmood Sabahi

Hassan Y Elnagar

John Y Lee

Paul L Wiggins

Judit Orgad

Ronny W Lin

Robert H Allen

Kevin J Theriot

Ralph W Magin

Robert C Herndon

Vernon O Brandt

Noel H Brantley

Matthew L Hurst

Brian F Becnel

Vincent James Gatto

Robert L Davis

Kenneth C Lilje

Charles E Hoyle

K Pushpananda Senaratne

David W Owens

Govindarajulu Kumar

Robert G Irwin

Sukhendu B Hait

Donald R Bell

Raymond B Dawson

Patrick S Bynum

Thomas Robert Nicholas

Hugh A Fisher

Judit O Orgad

Described are multi-ring antioxidant products comprising at least one sulfur-bridged aromatic hydrocarbon compound substituted on at least one of its aromatic rings by at least one sterically hindered 3,5-dihydrocarbyl-4-hydroxybenzyl moiety. Such products have the formula:R&#x2014;S&#x2014;R[&#x2014;S&#x2014;R]wherein each R is, independently, an aromatic hydrocarbon group having 6-12 carbon atoms, wherein m is 0-20, wherein n is 1-6 when m is 0, and when n is 1, m is 1-20; and wherein at least one of R, R, and Ris substituted by at least one such sterically hindered moiety. The preparation of such products and their use as antioxidants in compositions normally susceptible to oxidative degradation in oxygen or air, e.g., liquid fuel and lubricants, are also described.

Multi-ring antioxidants with antiwear properties

Processes for producing 1,3,5-trimethyl-2,4,6-tris(3,5-dialkyl-4-hydroxybenzyl)benzene are provided, in particular such processes that utilize 2,6-di-tert-butylphenol, paraformaldehyde, a secondary amine, mesitylene, and acetic acid.

Green and atom-economical processes for producing phenolic antioxidants

Described are multi-ring antioxidant products comprising at least one sulfur-bridged aromatic hydrocarbon compound substituted on at least one of its aromatic rings by at least one sterically hindered 3,5-dihydrocarbyl-4-hydroxybenzyl moiety. Such products have the formula: R&#x2014;S&#x2014;R[&#x2014;S&#x2014;R]wherein each R is, independently, an aromatic hydrocarbon group having 6-12 carbon atoms, wherein m is 0-20, wherein n is 1-6 when m is 0, and when n is 1, m is 1-20; and wherein at least one of R, R, and Ris substituted by at least one such sterically hindered moiety. The preparation of such products and their use as antioxidants in compositions normally susceptible to oxidative degradation in oxygen or air, e.g., liquid fuel and lubricants, are also described.

This invention relates to novel macromolecular amine-phenolic compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen, such as petroleum products, synthetic polymers, and elastomeric substances.

Macromolecular amine-phenolic antioxidant compositions, process technology thereof, and uses thereof

This invention relates to novel macromolecular compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen, such a petroleum products, synthetic polymers, and elastomeric substances.

Alkylated heterocyclic reaction products useful as antioxidants

This invention provides aromatic diimines where the diimines have imino groups with at least two carbon atoms, and either are in the form of one benzene ring having two imino groups on the ring, which imino groups are meta or para relative to each other, and in which each position ortho to an imino group bears a hydrocarbyl group, or are in the form of two benzene rings connected by an alkylene bridge and having one imino group on each ring, and in which each position ortho to an imino group bears a hydrocarbyl group. This invention also provides aromatic secondary diamines where the diamines have amino hydrocarbyl groups with at least two carbon atoms, and either are in the form of one benzene ring having two amino groups on the ring, which amino groups are meta or para relative to each other, and in which each position ortho to an amino group bears a hydrocarbyl group, or are in the form of two benzene rings connected by an alkylene bridge and having one amino group on each ring, and in which each position ortho to an amino group bears a hydrocarbyl group. Also provided are processes for forming diimines and secondary diamines from primary diamines, including the aromatic diimines and aromatic secondary diamines of the invention.

Diimines and secondary diamines

This invention provides chain extender compositions. These compositions comprise

Chain extenders

This invention provides aromatic diimines which have imino hydrocarbylidene groups with at least two carbon atoms, and aromatic secondary diamines which have amino hydrocarbyl groups with at least two carbon atoms. Both the aromatic diimines and the aromatic secondary diamines either are in the form of one phenyl ring, or are in the form of two phenyl rings connected by an alkylene bridge; each position ortho to an imino group or an amino group bears a hydrocarbyl group. When in the form of one phenyl ring, there are two imino groups on the ring or two amino groups on the ring; the imino groups or amino groups are meta or para relative to each other. When in the form of two phenyl rings connected by an alkylene bridge, there is either one imino group or one amino group on each phenyl ring. Also provided are processes for forming diimines and secondary diamines.

Benzophenone/thioxanthone derivatives useful as photoinitiators are provided as well as photopolymerizable compositions comprising the benzophenone/thioxanthone derivatives.

Benzophenone/thioxanthone derivatives and their use in photopolymerizable compositions

Propargyl bromide is effectively stabilized against shock or thermal decomposition by use therewith of an environmentally acceptable inert liquid solvent that forms an azeotrope with propargyl bromide.

Stabilization and use of propargyl bromide

Aromatic substrates are Ar-brominated in high yield and selectivity by reacting the substrate with a brominating agent in the presence of at least about 0.19 gram per mmol of substrate of a zeolite catalyst which has an absorbed water content of no greater than about 7.5 weight percent.

Selective bromination of aromatic compounds

Aromatic substrates such as fluorobenzene can be selectively brominated in high yield and conversion in short reaction periods by reacting the substrate with a brominating agent in a liquid reaction medium and in the presence of a catalyst composition formed by including in the medium a combination of (i) a shape selective HY or HM or zeolite catalyst, and (ii) at least one Lewis acid in a ratio of from 0.005 to 0.5 part by weight of (ii) per part by weight of (i). The bromination is performed at one or more temperatures in the range of 30 to 70&deg; C., and the amount of the zeolite is no more than about 10 grams per mole of aromatic substrate.

Growing community of inventors

Baton Rouge, LA, United States of America

Mahmood Sabahi