John Anton Thorpe

US Patent:

6391247, May 21, 2002

Filed:

Aug 31, 2000

Appl. No.:

09/652093

Inventors:

Hans G. Heine - San Mateo FL
John H. Mortimer - Medford NJ
Vitaly A. Peysakhovich - Moorestown NJ
John C. Thorpe - Edgewater Park NJ

Assignee:

Inductotherm Corp. - Rancocas NJ

International Classification:

C21B 1300

US Classification:

266 44, 266234, 266237

Abstract:

A flat inductor heating system for inducing heat in a variety of applications including heating, melting and holding a melt at temperature. The system may also be used to stir the melt. The system includes at least one flat induction coil cast in an aggregate of shot and a binding material. The aggregate serves to direct magnetic flux to the melt, thereby improving efficiency. The system is situated above a refractory holding the melt and may either rest on the refractory or be raised and lowered into and out of the refractory.

US Patent:

6919030, Jul 19, 2005

Filed:

Feb 24, 2003

Appl. No.:

10/373006

Inventors:

John A. Thorpe - Germantown TN, US
Christopher A. Fleming - Omemee, CA

Assignee:

Hannah Technologies Limited Partnership - Germantown TN

International Classification:

C02F001/42
B01J049/00

US Classification:

210665, 210670, 210684, 210688, 423 24

Abstract:

A process for recovering cyanide from feed material containing cyanide and copper involves the steps of: (a) contacting the feed material with a strong base anion exchange resin whereby copper and cyanide from the feed material are adsorbed onto the resin; (b) contacting the resulting resin with an eluant solution containing free cyanide ion to elute copper and cyanide from the resin; (c) separating the eluted resin from the eluting solution or eluate from step (b); (d) acidifying the eluate from step (b) to precipitate copper; (e) separating the acidified solution from the precipitate in step (d) and alkalizing directly or after concentration the separated solution containing HCN; (f) contacting the eluted resin from step (b) with an acid to condition the resin and remove additional cyanide while leaving most of the copper in the resin phase; (g) converting the HCN solution formed in step (f) to cyanide ion, directly or after concentration of the HCN solution, by the addition of alkali; and (h) returning the conditioned resin from step (f) to step (a) above.

US Patent:

54115752, May 2, 1995

Filed:

Mar 25, 1994

Appl. No.:

8/217912

Inventors:

Christopher A. Fleming - Peterborough, CA
Walther G. Grot - Chadds Ford PA
John A. Thorpe - Memphis TN

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C22B 1108

US Classification:

75743

Abstract:

A hydrometallurgical process for treating copper ores or concentrates containing gold by simultaneously leaching both copper and gold into an aqueous cyanide solution, recovering copper and gold in metallic form by electrowinning or cementation and regenerating cyanide ions is provided.

US Patent:

40654869, Dec 27, 1977

Filed:

Sep 13, 1976

Appl. No.:

5/722514

Inventors:

John Anton Thorpe - Memphis TN
Harold Felton Porter - Hockessin DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C12014
C07C12000

US Classification:

2604653

Abstract:

Process for recovering reactants and products e. g. , acrylonitrile and hydrogen cyanide from an aqueous stream obtained in the ammoxidation of propylene which comprises heating an aqueous stream containing the afore-said compounds in a heat exchanger by circulating the stream at a velocity of at least 6 ft/sec through the exchanger while maintaining the stream in the liquid state to increase the temperature of the stream to at least 105. degree. C and thereafter rapidly reducing the pressure of the heated stream sufficiently to vaporize 0. 2-5% thereof and thereafter returning the vapor to the acrylonitrile process for recovery of energy used to heat the aqueous waste; usable materials e. g. , acrylonitrile and hydrogen cyanide and compounds such as ammonia which can be used to neutralize acid streams and subsequently either incinerating the unvaporized material directly or using the unvaporized material as fertilizer after appropriate treatment.

US Patent:

58074210, Sep 15, 1998

Filed:

Aug 2, 1996

Appl. No.:

8/695329

Inventors:

Christopher Andrew Fleming - Peterborough, CA
Walther Gustav Grot - Chadds Ford PA
John Anton Thorpe - Germantown TN

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C22B 1500
C22B 1100

US Classification:

75710

Abstract:

A hydrometallurgical process for treating copper feed materials containing gold and/or silver by simultaneously leaching copper, gold and/or silver into an aqueous cyanide solution, extracting copper, gold and cyanide with anion exchange resin is provided.