Gulf Research & Development Company

Richard E Hildebrand

John A Paraskos

James A Frayer

Herman Taylor, Jr

Angelo A Montagna

A process for liquefying coal employing a low temperature preheater zone, a higher temperature non-catalytic hydrocracking zone and a catalytic hydrogenation zone. The process is improved by venting gases from the high temperature hydrocracking zone.

Process for liquefying coal employing a vented dissolver

A process for liquefying coal employing in series a low temperature preheated zone, a higher temperature non-catalytic hydrocracking zone and a catalytic hydrogenation zone.

Catalytic process for liquefying coal

A process for converting solid carbonaceous material to a liquid product which involves heating a slurry composed of the solid carbonaceous material and a solvent, together with hydrogen, at elevated temperatures and elevated pressures in the presence of a substantially phosphate-free catalyst comprising a hydrogenating component selected from the group consisting of Group VI and Group VIII metals, their oxides and sulfides, supported on a non-zeolitic carrier, which catalyst is promoted with a minor amount of a Group IV-B metal.

Process for the conversion of carbonaceous materials

An asphaltene-containing oil hydrodesulfurization process employing a downstream catalyst and an upstream catalyst in a reactor. The downstream catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The upstream catalyst comprises Group VI and Group VIII metals without promotion with Group IV-B metal.

Desulfurization process employing multi-catalyst reactor

An asphaltene-containing oil hydrodesulfurization process employing parallel first stages in series with a unified second stage. The second stage catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The catalyst in the first stage comprises supported Group VI and Group VIII metals without promotion with Group IV-B metal. In the process, deactivated non-promoted catalyst is replaced at least once from at least one of the parallel first stages while continuing to operate the other of the parallel first stages to supply a reduced oil flow to the second stage during the catalyst replacement step.

Hydrodesulfurization process with parallel first stages in series with a

An asphaltene-containing oil hydrodesulfurization process employing stages in series with an interstage flashing step. The second stage catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The first stage catalyst comprises supported Group VI and Group VIII metals without promotion with Group IV-B metal. In the process, deactivated first stage catalyst is replaced at least once without replacing the promoted second stage catalyst so that the promoted second stage catalyst is onstream for at least two first stage catalyst cycles.

Multi-stage hydrodesulfurization process utilizing multi-cycle second

An asphaltene-containing oil hydrodesulfurization process employing stages in series with an interstage flashing step. The second stage catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The first stage catalyst comprises supported Group VI and Group VIII metals without promotion with Group IV-B metal.

Multi-stage hydrodesulfurization utilizing a second stage catalyst

An asphaltene-containing oil hydrodesulfurization process employing stages in series with an interstage flashing step. The second stage catalyst comprises Group VI and Group VIII metals together with a promoting amount of Group IV-B metal. The coke level on the second stage catalyst is reduced by intermittent increase and decrease of the hydrogen pressure in the second stage.

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Indiana, PA, United States of America

Richard E Hildebrand