Amoco Corporation

Bp Corporation North America Inc.

Bp Amoco Corporation

Allen B Mossman

David A Young

John A Macek

David L Sikkenga

Juergen K Holzhauer

Weilong L Chiang

Kenneth J Abrams

Gregory P Hussmann

Frank G Belmonte

Paul K Behrens

Egils Vitands

Rosemary F McMahon

Lawrence G Packer

Christopher G Meller

Olusola Sunday Ogundiran

J Deven Cleckler

Raymond J Eifert

Michael J Panzer

Dale A Figgins

Linus Kai-Wah Leung

Rosemary F Mcmahon

A process for oxidation with oxygen of at least one aromatic hydrocarbon having oxidizable, substituents that maximizes the utilization of oxygen without reduction in the quality of the carboxylic acid products produced by means of a stagewise countercurrent oxidation system is disclosed.

Staged countercurrent oxidation

A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic acid, a dialkylester of a naphthalenedicarboxylic acid, and a polyethylene naphthalate containing material, at a given temperature and pressure through series arranged reaction zones and subsequently removing a product comprising a dialkylester formed by the reaction of the naphthalenedicarboxylic acid and the polyethylene naphthalate containing material with the low molecular weight alcohol from a reaction zone. This invention is also directed to a process for preparing a purified dialkylester of a naphthalenedicarboxylic acid comprising a series of crystallization and distillation steps, and combinations thereof.

Recycling polyethylene naphthalate containing materials in a process to produce diesters

A process for upgrading a feedstock comprising lower oligomers and higher oligomers of isobutylene by oligomerizing the lower oligomer fraction thereof to higher molecular weight components.

Upgrading light oligomers

Methods for reducing the fouling of process equipment used in the manufacture of aromatic compounds such as dimethyl-2,6-naphthalenedicarboxylate are disclosed. The methods require treating manufacturing process streams with a metal complexing agent. Novel compositions useful in the manufacture of aromatic materials such as dimethyl-2,6-naphthalenedicarboxylate also are disclosed.

Composition and method for reducing fouling in process equipment used

High quality linear polyester resin is prepared by reacting in a first step or zone 2,6-naphthalene dicarboxylic acid with a molten prepolymer derived from a glycol and 2,6-naphthalene dicarboxylic acid to form a low molecular weight product of the first step or zone; reacting this resultant product with a glycol in at least two successive steps or zones of glycol addition to form prepolymer; and polymerizing at least a portion of the resulting prepolymer to form polyester resin which exhibits midpoint glass transition temperatures above about 123.degree. C. The resulting prepolymer is particularly suitable for reaction with the 2,6-naphthalene dicarboxylic acid in the first step or zone. Advantageously, at least a portion of the prepolymer is, therefore, returned to the first step or zone.

Process for manufacture of high molecular weight polyester resins from

The 4,2'-disubstituted diphenyl carbonate or, optionally, ether content of regioimpure mixtures of compounds of formula: ##STR1## where X is F, Cl, and NO.sub.2, can be decreased to essentially zero starting with o-, m- and p-containing regioimpure mixtures by treating with the corresponding m- or p-substituted phenol and, optionally, a decarboxylation catalyst and removing the o-substituted phenol produced by volatilization or recrystallization from a solvent.

Changing the regiopurity of mixtures containing 4,4'-disubstituted

A method of preparing polyester materials comprising polymerizing a mixture comprising a diol and a stabilized diester of a naphthalenedicarboxylic acid.

Stabilized naphthalenedicarboxylic acid diesters

A regioselective nitration process for diphenyl compounds which can be carried out at about ambient temperature in which each ring of the diphenyl compound is selectively nitrated in the para position to form the corresponding di(4-nitrophenyl) compound. Such compounds as diphenyl carbonate, 2,2-diphenylpropane, 2,2-diphenylhexafluoropropane, diphenyl sulfide, diphenyl ketone, diphenyl sulfone, and the like can be converted to an isomeric mixture containing an enhanced amount of the corresponding di(4-nitrophenyl) compound, which mixture may be reduced or purified and reduced to the di(4-aminophenyl) analogues for use in the manufacture of polyamides, polyimides, and polyamide-imides.

Regioselective nitration of diphenyl compounds

A method for stabilizing molten diesters of naphthalenedicarboxylic acids and stabilized naphthalenedicarboxylic acid diester compositions are disclosed.

A process for etherifying phenols comprising reacting phenols at elevated temperature and pressure with a reactant selected from the group consisting of alcohol, ether and mixtures thereof in the presence of a catalyst comprising a sulfated oxide of a lanthanide series metal selected from the group consisting of the lanthanide series metals and mixtures thereof on a support.

Catalytic etherification of phenols to alkyl aryl ethers

A process for etherifying phenols comprising reacting phenols at elevated temperature and pressure with a reactant selected from the group consisting of alcohol, ether and mixtures thereof in the presence of a catalyst comprising a sulfated oxide of a Group IB metal selected from the group consisting of Cu, Ag, Au and mixtures thereof on a support.

A process for etherifying phenols comprising reacting phenols at elevated temperature and pressure with a reactant selected from the group consisting of alcohol, ether and mixtures thereof in the presence of a catalyst comprising a sulfated oxide of a Group VIB metal selected from the group consisting of Cr, Mo, and mixtures thereof on a support.

A process for etherifying phenols comprising reacting phenols at elevated temperature and pressure with a reactant selected from the group consisting of alcohol, ether and mixtures thereof in the presence of a catalyst comprising a sulfated oxide of a Group IIB metal selected from the group consisting of Zn, Cd, Hg and mixtures thereof on a support.

A process for etherifying phenols comprising reacting phenols at elevated temperature and pressure with a reactant selected from the group consisting of alcohol, ether and mixtures thereof in the presence of a catalyst comprising a sulfated oxide of a Group VIIB metal selected from the group consisting of Mn, Re, and mixtures thereof on a support.

Growing community of inventors

Wheaton, IL, United States of America

Allen B Mossman