Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate
2007-08-07
2007-08-07
Carrillo, Sharidan (Department: 1746)
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
C423S477000, C423S478000, C210S749000, C210S753000, C210S754000, C210S755000, C422S082090, C422S082090, C422S028000, C422S032000, C166S311000, C134S022100, C134S022110, C134S022140, C134S022160, C134S022180, C134S022190, C134S026000, C134S028000, C134S029000, C134S034000, C134S036000, C134S041000
Reexamination Certificate
active
11000587
ABSTRACT:
On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents. These cleaning and disinfecting methods work in a variety of industrial water systems including cooling water and boiler water systems.
REFERENCES:
patent: 3082146 (1963-03-01), Wentworth et al.
patent: 3578589 (1971-05-01), Hwa et al.
patent: 4013761 (1977-03-01), Ward et al.
patent: 4247531 (1981-01-01), Hicks
patent: 4512908 (1985-04-01), Heile
patent: 4631131 (1986-12-01), Cuisia et al.
patent: 4690772 (1987-09-01), Tell et al.
patent: 4929365 (1990-05-01), Clark et al.
patent: 4945992 (1990-08-01), Sacco
patent: 5171441 (1992-12-01), Mason
patent: 5324477 (1994-06-01), Schroeder et al.
patent: 5401419 (1995-03-01), Kocib
patent: 5424032 (1995-06-01), Christensen et al.
patent: 5611920 (1997-03-01), Simpson et al.
patent: 5670055 (1997-09-01), Yu et al.
patent: 5676920 (1997-10-01), Lipsztajn
patent: 5779914 (1998-07-01), Brown et al.
patent: 5800732 (1998-09-01), Coughlin et al.
patent: 5874026 (1999-02-01), Pilsits, Jr. et al.
patent: 5972238 (1999-10-01), Rimpler et al.
patent: 6080323 (2000-06-01), Yu et al.
patent: 6123966 (2000-09-01), Kross
patent: 6132628 (2000-10-01), Barak
patent: 6139830 (2000-10-01), Donian et al.
patent: 6183649 (2001-02-01), Fontana
patent: 6215008 (2001-04-01), Heffron
patent: 6218491 (2001-04-01), Fu et al.
patent: 2002/0014463 (2002-02-01), Iverson et al.
patent: 2003/0141258 (2003-07-01), Hatch
patent: 2004/0033190 (2004-02-01), Suty et al.
patent: 2004/0055969 (2004-03-01), Barnes
patent: 0 592 118 (1994-04-01), None
patent: 2 313 369 (1997-11-01), None
patent: 08013995 (1987-04-01), None
patent: 8902542 (1986-08-01), None
patent: WO 01/55717 (2001-08-01), None
patent: WO 02/12130 (2002-02-01), None
“Alternative Disinfectants and Oxidants Guidance Manual”, United States Environmental Protection Agency, Office of Walter, EPA 815-R-99-014, Chapters 1-9, Appendix A-B, Apr. 1999.
“Control of Biofilm in Alkaline White Water Systems with Chlorine Dioxide”, J.W. Wadsworth, G.D. Simpson, Ph.D., Engineering & Papermakers Conference, TAPPI Proceedings, pp. 1095-1102, 1997.
“Control of Legionella in Cooling Towers” Summary Guidelines, Section of Acute and Communicable Disease Epidemiology, Bureau of Community Health and Prevention, Division of Health, Wisconsin Department of Health and Social Services, T. Cullen, J. Torphy, I. Imm, J. Davis, M.D., pp. i-viii, 1-31, Appendix A - I, Aug. 1987.
“The Stability of Azoles to Chlorine Alternatives for Microbiological Control”, M.T. Coschigano, W.S. Go, Drew Industrial Division Ashland Chemical, Inc., Boonton, New Jersey, pp. 375-379, IWC-93-63.
Gill Jasbir S.
Gupta Amit
Breininger Thomas M.
Carrillo Sharidan
DiMattia Peter A.
Martin Michael B.
Nalco Company
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