Exxon Research and Engineering Company

George M Kramer

Edwin R Ernst

Andres M Fraga

Martin B Dines

Chang S Hsu

Stuart Leon Soled

Daniel Paul Leta

Herbert C Brown

Walter Weissman

Enrique Iglesia

Richard B Hall

Gopal H Singhal

Peter S Maa

William E Gates

William Anthony Lamberti

Edward T Maas, Jr

Frederic Leder

Richard Harry Ernst

Mark Michael Disko

Sutinder K Behal

Andrew Kaldor

Donald M Cox

Herman J Solomon

Rowland Pettit, Deceased

Richard O Marsh

Kenneth T Ockey

Heart valve implants and methods utilizing those valves designed to reduce or eliminate the regurgitant jet associated with an incompetent atrioventricular valve. The heart valve implants, which are deployed via a transcatheter venous approach, comprise a collapsible framework connected to an anchored guide shaft, a valve portion and an apron which permits ingrowth of native heart tissue into the apron.

Implantable transcatheter intracardiac devices and methods for treating incompetent atrioventricular valves

Y-stents and delivery apparatus for delivering the Y-stents include a delivery catheter with an open distal end having two, circumferentially opposed extensions separated by two receiving portions which receive an anatomical junction.

Tracheobronchial Y-stents, delivery catheters and delivery apparatus, and methods for delivering bronchial Y-stents

An improved process for recovering hard acids and soft bases used to decompose coal in which finely divided coal particles are contacted with a hard acid in the presence of a soft base at temperatures of from 0.degree. to 100.degree. C., said hard acid being characterized by a heat of reaction with dimethylsulfide of from 10 kcal/mol to 30 kcal/mol and said soft base being characterized by a heat of reaction with boron trifluoride of from 10 kcal/mol to 17 kcal/mol, followed by extracting the decomposed coal to remove said hard acid and soft base wherein the improvement comprises performing said extraction at a temperature of about 0.degree. to about 50.degree. C. using dimethylcarbonate as the extraction solvent.

Recovery of hard acids and soft bases from decomposed coal

An improved process for recovering hard acids and soft bases used to decompose coal in which finely divided coal particles are contacted with a hard acid in the presence of a soft base at temperatures of from 0.degree. to 100.degree. C., said hard acid being characterized by a heat of reaction with dimethylsulfide of from 10 kcal/mol to 30 kcal/mol and said soft base being characterized by a heat of reaction with boron trifluoride of from 10 kcal/mol to 17 kcal/mol, followed by extracting the decomposed coal to remove said hard acid and soft base wherein the improvement comprises performing said extraction at a temperature of about 0.degree. to about 50.degree. C. using dimethylsulfide as the extraction solvent, and wherein following said dimethylcarbonate extraction, said decomposed coal is extracted with water at a temperature of from about 60.degree. to 275.degree. C.

An improved process for recovering hard acids and soft bases used to decompose coal in which finely divided coal particles are contacted with a hard acid in the presence of a soft base at temperatures of from 0.degree. to 100.degree. C., said hard acid being characterized by a heat of reaction with dimethylsulfide of from 10 kcal/mol to 30 kcal/mol and said soft base being characterized by a heat of reaction with boron trifluoride of from 10 kcal/mol to 17 kcal/mol, followed by extracting the decomposed coal to remove said hard acid and soft base wherein the improvement comprises performing said extraction at a temperature of about 0.degree. to about 50.degree. C. using dimethylcarbonate as the extraction solvent, and wherein following said dimethylcarbonate extraction, said coal is extracted with water at a temperature of from about 60.degree. to 275.degree. C., and wherein following said water extraction, said coal is soxhlet extracted in sulfolane at a temperature of about 25.degree. to about 350.degree. C., and wherein following said sulfolane extraction, said coal is soxhlet extracted to remove said sulfolane.

Golf swing alignment mat

A process for depolymerizing coal at low temperatures by contacting finely divided coal with a hard acid and soft base.

Coal depolymerization utilizing hard acid/soft base

A process for preparing a low ash coal wherein coal is depolymerized at low temperature by contacting finely divided coal with a hard acid and soft base, and extracting the depolymerized coal to remove mineral contaminants.

Low ash coal products from depolymerized coal

A process for hydroprocessing coal to hydrocarbon oils wherein coal is depolymerized at low temperatures by contacting finely divided coal with a hard acid and soft base. The depolymerized coal is then hydroprocessed to hydrocarbon oils by forming a mixture with a coal conversion catalyst or precursor thereof, and hydroprocessing the mixture at temperatures of from 250.degree. to 550.degree. C. and hydrogen partial pressures of from 2100 to 35000 kPa.

Coal depolymerization and hydroprocessing

A process for isomerizing a paraffin feed comprising contacting the feed with a strong, solid acid catalyst comprising a sulfated Group IVB metal oxide and at least one Group VIII metal in the presence of hydrogen and an adamantane compound.

Isomerization of paraffins with strong solid acid catalyst and adamantane

Disclosed is an alkylation process comprising the step of contacting a paraffinic compound, capable of forming a carbonium ion under strong acid conditions, with an olefin in the presence of a strong acid system comprised of an acid component and a mixture comprised of: (a) one or more adamantane derivatives containing at least one unsubstituted bridgehead position and which is capable of being protonated, or hydrogen bonded to, or dissociated by an acid; and (b) one or more surfactants capable of stabilizing the one or more adamantane derivatives of (a) above at a hydrocarbon-acid interface.

Adamantane derivative/surfactant catalyzed paraffin-olefin alkylation

Esters or carboxylic acids are prepared from olefins containing at least two carbon atoms by reacting the olefin with carbon monoxide in the presence of:

Preparing esters and carboxylic acids from lower olefins

A process is described for paraffin-olefin alkylation under strong acid conditions in which an adamantylalkyl carboxylic acid or sulfonic acid is used to substantially improve the efficiency of reaction.

Adamantyl carboxylic and sulfonic acid catalyzed paraffin-olefin

A process is described for paraffin isomerization under strong acid conditions in which an adamantyl carboxylic acid or sulfonic acid is used to substantially increase the reaction rate of the isomerization.

Adamantyl carboxylic and sulfonic acid catalyzed paraffin isomerization

Novel compositions of matter are disclosed having the general formula UO.sub.2 AA'L.sub.n, in which A and A' are anions whose conjugate acids have boiling points less than about 200.degree. C. and pK.sub.a values of 4.8 or less, L is a neutral ligand (1) having a boiling point of greater than about 200.degree. C. and an equilibrium constant for its exchange reaction with complexed tetrahydrofuran of greater than about 10.sup.-3, or (2) having an equilibrium constant for its exchange reaction with complexed tetrahydrofuran of greater than about 10.sup.3, and n is an integer of from 1 to 4.

Growing community of inventors

Berkeley Heights, NJ, United States of America

George M Kramer