Frederick W Lichtner

US Patent:

20070045189, Mar 1, 2007

Filed:

Aug 31, 2005

Appl. No.:

11/216558

Inventors:

Frederick Lichtner - Richboro PA, US
Robert Hendel - Chalfont PA, US
David Polizzotti - Yardley PA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

B01D 61/02

US Classification:

210652000, 210749000, 210758000, 210804000, 210696000

Abstract:

Acid mine demineralization methods wherein the acid mine drainage is neutralized, clarified, and forwarded to a microfiltration unit. The so filtered drainage water is then forwarded to a reverse osmosis unit. The permeate from the reverse osmosis unit is characterized by reduced sulfate, silica, calcium, aluminum, iron, magnesium, and manganese levels. Additionally, improvement in reduction of total dissolved solids is noted.

US Patent:

44091923, Oct 11, 1983

Filed:

Apr 26, 1982

Appl. No.:

6/371403

Inventors:

Frederick W. Lichtner - Richboro PA
Jean T. Rose - Fairless Hills PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C01B 1700

US Classification:

423242

Abstract:

The present invention is directed to a method of removing sulfur dioxide from flue gases derived from furnaces burning high sulfur content fuels. The method comprises spraying flue gases with an aqueous medium containing (i) a material either dissolved or slurried therein, which material reacts with the sulfur dioxide in the flue gas to produce calcium sulfate and calcium sulfite, and (ii) a composition comprising a substantially linear water-soluble sulfonated polystyrene, and an organo-phosphonic acid derivative having the structural formula (X). sub. 2 N--R--N(X). sub. 2 where R is a lower alkyl of from 1 to 7 carbon atoms, X is hydrogen or the group -- CH. sub. 2 PO. sub. 3 M. sub. 2, where M is a water-soluble cation, the compound being further characterized in that at least one but preferably all X's are --CH. sub. 2 PO. sub. 3 M. sub. 2. In certain instances it is desirable to use in conjunction with the invention a water-soluble lignosulfonate.