Robert Stanley Rickard

US Patent:

39339769, Jan 20, 1976

Filed:

Feb 8, 1974

Appl. No.:

5/441180

Inventors:

Cvetko B. Nikolic - Golden CO
Robert S. Rickard - Lakewood CO
Weldon P. Zundel - Golden CO

Assignee:

Amax Inc. - New York NY

International Classification:

C01G 5100
C01G 5300

US Classification:

423144

Abstract:

A method is provided for enriching nickel in a nickel-cobalt solution to a nickel-to-cobalt ratio of over 2000:1, wherein an aliquot portion of the solution is removed, the nickel precipitated from said aliquot portion in the nickelous state, the nickelous precipitate thereafter oxidized to the nickelic state and the oxidized nickel precipitate then mixed with the remaining nickel-cobalt solution to oxidize the cobalt therein to the cobaltic state which precipitates from the solution, thereby highly enriching the solution in nickel.

US Patent:

51035782, Apr 14, 1992

Filed:

Mar 26, 1991

Appl. No.:

7/675438

Inventors:

Robert S. Rickard - Golden CO

Assignee:

Amoco Corporation - Chicago IL

International Classification:

F26B 1330

US Classification:

34 92

Abstract:

Volatile compounds such as polychlorinated biphenyls (PCB's) which contaminate a soil can be removed--without incineration--by a process which generally involves: (1) introducing the contaminated soil into a vessel, (2) heating the soil to a temperature greater than about 300. degree. F. , but less than 600. degree. F. , preferably in the presence of an inert gas, (3) drawing a vacuum on the vessel to such a degree as to cause the contaminant to flash to a contaminant vapor and (4) condensing the contaminate vapor to a liquid and (5) disposing of said liquid.

US Patent:

41151100, Sep 19, 1978

Filed:

Apr 8, 1977

Appl. No.:

5/786026

Inventors:

Roman Z. Pyrih - Golden CO
Robert S. Rickard - Golden CO

Assignee:

Earth Sciences, Inc. - Golden CO

International Classification:

C22B 3422
C22C 3824
C01G 3100

US Classification:

75101R

Abstract:

A process for recovering vanadium values from carbonaceous type vanadium ores, and vanadium scrap, such as vanadium contaminated spent catalyst, is disclosed which comprises roasting the vanadium containing material in air at a temperature less than about 600. degree. C to produce a material substantially devoid of organic matter, subjecting said roasted material to a further oxidizing roast in an oxygen atmosphere at a temperature of at least about 800. degree. C for a period sufficient to convert substantially all of the vanadium to the soluble form, leaching the calcine with a suitable dilute mineral acid or water at a pH of neutral to about 2 to recover vanadium values, precipitating vanadium values as iron vanadate from the leach solution with a soluble iron compound at a pH from neutral to about 1, and recovering ferrovanadium from the iron vanadate by a reduction vacuum smelting operation. The conversion of vanadium in the ore to the soluble form by the oxidizing roast is accomplished without the addition of an alkaline salt during calcining.

US Patent:

39339750, Jan 20, 1976

Filed:

Feb 8, 1974

Appl. No.:

5/441179

Inventors:

Cvetko B. Nikolic - Golden CO
Weldon P. Zundel - Golden CO
Robert S. Rickard - Lakewood CO

Assignee:

Amax Inc. - New York NY

International Classification:

C01G 5306
C01G 5100

US Classification:

423139

Abstract:

A method is provided for separating nickel and cobalt from a cobalt-nickel precipitate, the cobalt being in the cobaltic state. The method comprises dissolving the precipitate in an ammonium sulfate solution containing NH. sub. 3, acidifying the solution to a pH of about 1. 5 to 3. 0 and then cooling the solution to produce a nickel-ammonium sulfate precipitate highly enriched in nickel. The precipitate is separated from the solution and the solution passed through an ion exchange column selective to the removal of nickel, the solution remaining containing said cobalt substantially free of nickel, the cobalt solution being then sent to cobalt recovery.

US Patent:

42631483, Apr 21, 1981

Filed:

Apr 9, 1979

Appl. No.:

6/028455

Inventors:

Raymond D. Symens - Lakewood CO
Robert S. Rickard - Golden CO

Assignee:

Earth Sciences, Inc. - Golden CO

International Classification:

B03D 102
C01B 25235

US Classification:

210705

Abstract:

A process is disclosed for removing colloidal and non-colloidal humic matter from an aqueous solution of phosphoric acid, the process comprising (a) treating the phosphoric acid solution with a flocculant to flocculate the humic matter, (b) adding to the aqueous solution an effective amount of a phenol compound in order to destabilize the colloidal humic matter contained in the solution and to aid in the formation of froth, and (c) separating the humic matter from the solution by froth flotation.