Mark E Freetly

US Patent:

6790245, Sep 14, 2004

Filed:

Oct 7, 2002

Appl. No.:

10/265973

Inventors:

Andrew R. Wolff - Darien IL
Joseph P. Pircon - Aurora IL
Mark E. Freetly - Springfield IL

Assignee:

Benetech, Inc. - Montgomery IL

International Classification:

C09K 322

US Classification:

44602, 252 881

Abstract:

A method for suppressing dust emanation from a dust-bearing material comprises applying to the material a dust suppressant that comprises molasses-derived protein.

US Patent:

60663049, May 23, 2000

Filed:

Aug 6, 1998

Appl. No.:

9/130340

Inventors:

Mark Freetly - Good Hope IL
John M. Heeney - Barrington IL

International Classification:

B01D 5350
C02C 124

US Classification:

42324306

Abstract:

A process is provided for scrubbing sulfur dioxide out of a flue gas by contacting the flue gas with a scrubbing liquid containing diammonium phosphate and ammonium sulfite and in which the total concentration of phosphates is maintained in a balance with the total concentration of sulfites so that the formation and release of plumes of ammonium sulfite are minimized. The sulfur dioxide in the flue gas reacts with the diammonium phosphate to produce monoammonium phosphate and ammonium bisulfite. A portion of the scrubbing liquid is contacted with ammonium ions to convert the monoammonium phosphate into diammonium phosphate and the ammonium bisulfite into ammonium sulfite, and the same portion of scrubbing liquid is contacted with oxygen to convert the ammonium ammonium sulfite into ammonium sulfate. Ammonium sulfate is removed from the process and the oxidized scrubbing liquid is recycled for further contact with flue gas.