John N Kent

US Patent:

49861972, Jan 22, 1991

Filed:

May 8, 1990

Appl. No.:

7/520558

Inventors:

John M. Kent - Slidell LA

International Classification:

A47J 3600
A47J 3624

US Classification:

110246

Abstract:

Hazardous waste is formed into non-hazardous non-leaching aggregate by introducing the material to a rotary kiln where the large solids are at least partially combusted to form a primary aggregate. Gaseous combustion by-products and waste fines from the waste materials are introduced into at least one oxidizer having water-cooled metal walls. Some of the waste fines are melted to form a molten slag-like material that is removed from the apparatus and cooled to form non-hazardous aggregate. The portion of the material in the oxidizer that is not melted, is cooled, neutralized and subjected to a solid gas separation. The solid is reintroduced to the oxidizer with the primary aggregate where they are either melted or entrained within the molten material and become an integral part of the non-hazardous aggregate.

US Patent:

RE352195, Apr 30, 1996

Filed:

Jan 21, 1993

Appl. No.:

8/006604

Inventors:

John M. Kent - Slidell LA

Assignee:

Marine Shale Processors, Inc. - Baton Rouge LA

International Classification:

A47J 3600
A47J 3624

US Classification:

110246

Abstract:

Hazardous waste is formed into non-hazardous non-leaching aggregate by introducing the material to a rotary kiln where the large solids are at least partially combusted to form a primary aggregate. Gaseous combustion by-products and waste fines from the waste materials are introduced into at least one oxidizer having water-cooled metal walls. Some of the waste fines are melted to form a molten slag-like material that is removed from the apparatus and cooled to form non-hazardous aggregate. The portion of the material in the oxidizer that is not melted, is cooled, neutralized and subjected to a solid gas separation. The solid is reintroduced to the oxidizer with the primary aggregate where they are either melted or entrained within the molten material and become an integral part of the non-hazardous aggregate.

US Patent:

49228412, May 8, 1990

Filed:

Jun 6, 1989

Appl. No.:

7/362352

Inventors:

John M. Kent - Slidell LA

International Classification:

F23G 500
F23G 512

US Classification:

110346

Abstract:

Hazardous waste is formed into non-hazardous non-leaching aggregate by introducing the material to a rotary kiln where the large solids are at least partially combusted to form a primary aggregate. Gaseous combustion by-products and waste fines from the waste materials are introduced into at least one oxidizer operating at a temperature in the range of from about 1800. degree. to 2500. degree. F. Under such conditions, some of the waste fines are melted to form a slag-like material that is cooled to form the non-hazardous aggregate. The portion of the material in the oxidizer that is not melted, is cooled, neutralized and subjected to a solid gas separation. The solid is reintroduced to the oxidizer with the primary aggregate where they are either melted or entrained within the molten material and become an integral part of the non-hazardous aggregate.

US Patent:

51332671, Jul 28, 1992

Filed:

Oct 1, 1991

Appl. No.:

7/769260

Inventors:

John M. Kent - Slidell LA
Henry L. Robards - Thibodaux LA

Assignee:

Marine Shale Processors, Inc. - St. Rose LA

International Classification:

F23G 500
F23G 512

US Classification:

110346

Abstract:

Hazardous waste is formed into non-hazardous non-leaching aggregate by introducing particulate noncombustible material into at least one oxidizer beneath the surface of an accumulation of molten noncombustible material. It is preferred that the walls of a portion of the apparatus be comprised of a layer of refractory material containing metal pins over a metal-walled, water-cooled vessel.