Thomas F Holcombe

US Patent:

6350289, Feb 26, 2002

Filed:

May 18, 1999

Appl. No.:

09/308524

Inventors:

Thomas C. Holcombe - Neshanic Station NJ
Donald P. Malone - Grayson KY

Assignee:

Marathon Ashland Petroleum LLC - Miamisburg OH
Envires LLC - Findlay OH

International Classification:

C10J 306

US Classification:

48197R, 48 92, 481982

Abstract:

A high pressure two-zone molten iron gasification process for converting solid, liquid and gaseous hydrocarbon feeds into separate substantially hydrogen-rich and carbon monoxide-rich streams at 2 to 200 atmospheres pressure by feeding hydrocarbons into the molten iron in a first zone ( ) in which hydrogen-rich gas is formed and then circulating the molten iron into contact with an oxygen containing gas in a second zone ( ) in which carbon monoxyide-rich gas is formed. The carbon level in the circulating molten iron is carefully controlled above 0. 3 wt. % to minimize formation of FeO. Hydrogen sulfide and other volatile sulfur compounds are removed from the separate gas streams via scrubbing in downstream equipment ( and ).

US Patent:

62352539, May 22, 2001

Filed:

Jun 2, 1999

Appl. No.:

9/324333

Inventors:

Thomas C. Holcombe - Neshanic Station NJ
Donald P. Malone - Grayson KY

Assignee:

Marathon Ashland Petroleum, LLC - Finlay OH
Envires LLC - Miamisburg OH

International Classification:

C22B 3420
C22B 3422
C22B 3424

US Classification:

423 62

Abstract:

A process for recovering and purifying vanadium found in petroleum coke is disclosed. Coke containing V and other metals such as Ni is charged to a molten metal bath and dissolved to form a molten metal bath with dissolved carbon, dissolved V metal and dissolved Ni. Oxygen containing gas is added in an amount sufficient to heat balance the process and produce off gas. At least periodically the conditions in the bed are made more severely oxidizing so that a portion of the molten vanadium metal is oxidized to form slag. Oxidation is limited so that a majority of the Ni dissolved in the bath remains as dissolved elemental Ni metal. Oxidized vanadium species are continuously or intermittently withdrawn from the slag layer, by dust formation or by tapping the slag layer.

US Patent:

62842145, Sep 4, 2001

Filed:

Jun 2, 1999

Appl. No.:

9/324317

Inventors:

Thomas C. Holcombe - Neshanic Station NJ
Donald P. Malone - Grayson KY

Assignee:

Marathon Ashland Petroleum LLC - Findlay OH
Envires LLC - Miamisburg OH

International Classification:

C01B 1720

US Classification:

423563

Abstract:

A process for recovering and purifying vanadium found in petroleum coke is disclosed. Coke containing V and sulfur is charged to a molten metal bath and dissolved to form a molten metal bath with dissolved carbon, dissolved V metal and dissolved sulfur. At least a majority of the dissolved sulfur is released as H. sub. 2 S by maintaining reducing conditions in the bed, by maintaining a high concentration of dissolved carbon or addition of steam or hydrogen rich hydrocarbon such as methane or some combination of these approaches.