David H Herman

US Patent:

45978581, Jul 1, 1986

Filed:

Sep 14, 1984

Appl. No.:

6/650962

Inventors:

Lester E. Burgess - Swarthmore PA
Phillip E. McGarry - Palmerton PA
David E. Herman - Jim Thorpe PA

Assignee:

Sohio Alternate Energy Development Co. - Cleveland OH

International Classification:

B03D 102

US Classification:

209166

Abstract:

An improved method and apparatus for froth flotation separation of the components of a slurry, having particular utility for the beneficiation of coal by the flotation separation of coal particles from impurities associated therewith such as ash and sulfur. In this arrangement, a forward product stream is formed in which a first quantity of chemical reagents is mixed with the particulate matter slurry. The treated particulate matter slurry is then sprayed through a nozzle onto the surface of water in a forward stream flotation tank to create a floating froth phase containing therein a first quantity of the particulate matter. The remainder of the particulate matter slurry separates from the froth phase by sinking in the water, and the froth phase is separated as a first product. The remainder of the particulate matter slurry is then directed to a scavenger product stream in which an additional quantity of chemical reagents is mixed with the remainder of the separated particulate matter slurry. The mixture is then sprayed through a second nozzle onto the surface of water in a second scavenger stream flotation tank to create a floating froth phase containing therein a second quantity of the particulate matter.

US Patent:

46718010, Jun 9, 1987

Filed:

Jul 19, 1985

Appl. No.:

6/757025

Inventors:

Lester E. Burgess - Swarthmore PA
Robert G. Hagstrom - Wayne PA
David E. Herman - Jim Thorpe PA
Phillip E. McGarry - Palmerton PA

Assignee:

The Standard Oil Company - Cleveland OH

International Classification:

C10L 132

US Classification:

44 51

Abstract:

An integrated, continuous (or batch) process for the beneficiation and/or liquefaction of coal, especially low rank coals, is provided, the process generally involving admixing coal with an organic liquid medium under high shear agitation, further beneficiating the coal by admixing the same in an aqueous medium optionally containing a monomer and a polymerization catalyst therefor and subjecting the resultant coal product to further high shear agitation in the presence of certain organic liquid media to provide a liquefied coal extract product and a further solid coal product. Beneficiated solid and liquefied coal products are also provided.

US Patent:

43325939, Jun 1, 1982

Filed:

Jan 22, 1980

Appl. No.:

6/114357

Inventors:

Lester E. Burgess - Springfield PA
Karl M. Fox - Swarthmore PA
Phillip E. McGarry - Palmerton PA
David E. Herman - Jim Thorpe PA

Assignee:

Gulf & Western Industries, Inc. - New York NY

International Classification:

C10L 132

US Classification:

44 51

Abstract:

Mine run coal is pulverized and the extended surfaces of the coal particles are rendered hydrophobic and oilophilic by a chemical bonding and graft polymerization reaction with a water insoluble organic polymerizable monomer under peroxidation influence in a predominantly water reaction medium. The mineral ash present in the coal and particularly the iron pyrites remains hydrophilic and is separated from the polymeric organic surface bonded coal product in a water washing step wherein the washed coal floats on and is recovered from the water phase and the ash is removed with the separated wash water in a critical wash step. Excess water is removed from the beneficiated hydrophobic surface-altered coal product mechanically. The hydrophobic and oilophilic organic polymeric surface bonded coating about the coal particles is fortified by inclusion of additional unbound free fatty acids by further small additions thereof. The carboxylic acid groups present in the coal-oil product are thereafter converted to a metal soap.

US Patent:

45363722, Aug 20, 1985

Filed:

Apr 12, 1984

Appl. No.:

6/599204

Inventors:

Lester E. Burgess - Springfield PA
Karl M. Fox - Swarthmore PA
Phillip E. McGarry - Palmerton PA
David E. Herman - Jim Thorpe PA

Assignee:

The Standard Oil Company - Cleveland OH

International Classification:

B01J 800
C10L 132

US Classification:

422187

Abstract:

Mine run coal is pulverized and the extended surfaces of the coal particles are rendered hydrophobic and oilophilic by a chemical bonding and graft polymerization reaction with a water unsoluble organic polymerizable monomer under peroxidation influence in a predominantly water reaction medium. The mineral ash present in the coal and particularly the iron pyrites remains hydrophilic and is separated from the polymeric organic surface bonded coal product in a water washing step wherein the washed coal floats on and is recovered from the water phase and the ash is removed with the separated wash water in a critical wash step. Excess water is removed from the beneficiated hydrophobic surface-altered coal product mechanically. The hydrophobic and oilophilic organic polymeric surface bonded coating about the coal particles is fortified by inclusion of additional unbound free fatty acids by further small additions thereof. The carboxylic acid groups present in the coal-oil product are thereafter converted to a metal soap.

US Patent:

46054944, Aug 12, 1986

Filed:

Sep 14, 1984

Appl. No.:

6/650961

Inventors:

Lester E. Burgess - Media PA
Phillip E. McGarry - Palmerton PA
David E. Herman - Jim Thorpe PA

Assignee:

Sohio Alternate Energy Development Co. - Cleveland OH

International Classification:

B03D 102

US Classification:

209166

Abstract:

An improved method and apparatus for froth flotation separation of the components of a slurry, having particular utility for the beneficiation of coal by the flotation separation of coal particles from impurities associated therewith, such as ash and sulfur. In this arrangement, a forward product stream is formed in which a mixture of the particulate matter slurry and the chemical reagents is sprayed through a nozzle at a first relatively low pressure onto the surface of water in a forward stream flotation tank to create a floating froth phase containing therein a first quantity of the particulate matter. The remainder of the particulate matter slurry separates from the froth phase by sinking in the water, and the froth phase is separated as a first product. The remainder of the particulate matter slurry is then directed to a scavenger product stream in which the separated slurry is sprayed through a second nozzle at a second higher pressure onto the surface of water in a second scavenger stream flotation tank to create a floating froth phase containing therein a second quantity of the particulate matter. The second froth phase is then separated as a second product.

US Patent:

45643695, Jan 14, 1986

Filed:

Jul 22, 1983

Appl. No.:

6/516449

Inventors:

Lester E. Burgess - Swarthmore PA
Karl M. Fox - Swarthmore PA
Phillip E. McGarry - Palmerton PA
David E. Herman - Jim Thorpe PA

Assignee:

The Standard Oil Company - Cleveland OH

International Classification:

C10L 132
C10L 522

US Classification:

44 2

Abstract:

An improved process for the beneficiation of coal and the separation of impurities therefrom comprising subjecting coal to surface treatment by contact with an aqueous medium comprising polymerizable monomer, polymerization catalyst and liquid organic carrier, thereby rendering said coal hydrophobic and oleophilic, the improvement comprising the high shear intermixing of the surface treated coal with at least one water wash medium thereby providing for the removal of further hydrophilic impurities, such as mineral ash from the coal. Apparatus for carrying out the process and the products prepared therefrom are also provided.

US Patent:

44066643, Sep 27, 1983

Filed:

May 28, 1981

Appl. No.:

6/267777

Inventors:

Lester E. Burgess - Swarthmore PA
Karl M. Fox - Swarthmore PA
Phillip E. McGarry - Palmerton PA
David E. Herman - Jim Thorpe PA

Assignee:

Gulf & Western Industries, Inc. - New York NY

International Classification:

C10M 132

US Classification:

44 51

Abstract:

An improved process for the beneficiation of coal and the separation of impurities therefrom comprising subjecting coal to surface treatment by contact with an aqueous medium comprising polymerizable monomer, polymerization catalyst and liquid organic carrier, thereby rendering said coal hydrophobic and oleophilic, the improvement comprising the high shear intermixing of the surface treated coal with at least one water wash medium thereby providing for the removal of further hydrophilic impurities, such as mineral ash from the coal. Apparatus for carrying out the process and the products prepared therefrom are also provided.