Stephen W Moran

US Patent:

56676689, Sep 16, 1997

Filed:

Jul 12, 1996

Appl. No.:

8/680323

Inventors:

Stephen W. Moran - Wilmington NC
John R. Jackson - Wilmington NC
Timothy J. Gallivan - Hampstead NC
Richard E. Loftfield - Fruitcove FL

Assignee:

Huron Tech Corp - Jacksonville FL

International Classification:

C25F 100
C25B 116

US Classification:

205698

Abstract:

Pulping chemicals and hemicellulose are recovered from a starting solution essentially free of lignin but containing a mixture of hemicellulose and caustic by electrolyzing this solution in the anolyte compartment of an electrolytic cell. By electrolysis, the concentration of caustic in the anolyte is decreased and the concentration of caustic in a catholyte of said cell is increased so as to allow recovery of about 60 to about 80 percent of the caustic present in the hemicellulose caustic starting solution.

US Patent:

61325902, Oct 17, 2000

Filed:

Jun 1, 1998

Appl. No.:

9/088195

Inventors:

Stephen W. Moran - Wilmington NC
John R. Jackson - Wilmington NC

Assignee:

Huron Tech Corp - Delco NC

International Classification:

C25B 100

US Classification:

205496

Abstract:

An electrochemical process for the production of a hydroxide solution and a sulfate by the electrolysis of a waste aqueous mixture of oxidizable sulfur impurities in the anode compartment of at least one electrolytic cell while producing a hydroxide solution in the cathode compartment of the cell. The process is particularly applicable to the treatment of spent caustic solutions obtained by scrubbing a hydrocarbon process stream contaminated with oxidizable sulfur impurities. The electrolytic cell used in the electrolysis process of the invention can use either a porous membrane or a cationic permselective membrane to separate the anode and cathode compartments of the electrolysis cell. The electrolysis cell can be monopolar or bipolar and when bipolar, the bipolar electrodes if dissimilar, or the respective anode and cathode current collectors if dissimilar, which are attached thereto, are electrically connected by bonding with a conductive polymer or are joined by welding with or without an intermediate metal layer therebetween. Control of pH in the anolyte compartment of the electrolytic cell can be achieved by passing a selected amount of catholyte to the anolyte compartment.

US Patent:

62004409, Mar 13, 2001

Filed:

Mar 19, 1998

Appl. No.:

9/044364

Inventors:

Stephen W. Moran - Wilmington NC
Timothy J. Gallivan - Hampstead NC
John R. Jackson - Wilmington NC
Sam A. Pirapakaran - Wilmington NC

Assignee:

Huron Tech Corp - Delco NC

International Classification:

C25B 1108

US Classification:

20429001

Abstract:

Peroxydisulfuric acid and salts thereof are produced electrochemically from an aqueous acid sulfate solution in a cascading series of bipolar electrolytic cells having a cell body frames of polyvinyl chloride which are bonded with a vinyl ester polymer. An aqueous solution of peroxydisulfuric acid and salts thereof are withdrawn from the anode compartment of the last cell in the series, and metal impurities are removed by treatment with an ion exchange resin. Hydrogen peroxide is produced by hydrolyzing persulfuric acid and salts thereof. The sulfuric acid produced is recycled to the first cell in the series of cascading electrolytic cells.

US Patent:

55890539, Dec 31, 1996

Filed:

Nov 3, 1995

Appl. No.:

8/553019

Inventors:

Stephen W. Moran - Wilmington NC
John R. Jackson - Wilmington NC
Timothy J. Gallivan - Hampstead NC
Richard E. Loftfield - Fruitcove FL

Assignee:

Huron Tech Incorporated - Kingston

International Classification:

C02F 1461

US Classification:

205698

Abstract:

Pulping chemicals and hemicellulose are recovered from a starting solution essentially free of lignin but containing a mixture of hemicellulose and caustic by electrolyzing this solution in the anolyte compartment of an electrolytic cell. By electrolysis, the concentration of caustic in the anolyte is decreased and the concentration of caustic in a catholyte of said cell is increased so as to allow recovery, of about 60 to about 80 percent of the caustic contained in the hemicellulose caustic starting solution.