Chemistry of inorganic compounds – Halogen or compound thereof – Ternary compound
Reexamination Certificate
2006-08-08
2006-08-08
Nguyen, Ngoc-Yen (Department: 1754)
Chemistry of inorganic compounds
Halogen or compound thereof
Ternary compound
C423S477000, C423S478000
Reexamination Certificate
active
07087208
ABSTRACT:
Chlorous acid is generated from a chlorite salt precursor, a chlorate salt precursor, or a combination of both by ion exchange. The ion exchange material facilitates the generation of chlorous acid by simultaneously removing unwanted cations from solution and adding hydrogen ion to solution. Chlorine dioxide is generated in a controlled manner from chlorous acid by catalysis. Chlorine dioxide can be generated either subsequent to the generation of chlorous acid or simultaneously with the generation of chlorous acid. For catalysis of chlorous acid to chlorine dioxide, the chlorous acid may be generated by ion exchange or in a conventional manner. Ion exchange materials are also used to purify the chlorous acid and chlorine dioxide solutions, without causing degradation of said solutions, to exchange undesirable ions in the chlorous acid and chlorine dioxide solutions with desirable ions, such as stabilizing ions, and to adjust the pH of chlorous acid and chlorine dioxide solutions.
REFERENCES:
patent: 3684437 (1972-08-01), Callerame
patent: 3828097 (1974-08-01), Callerame
patent: 3857737 (1974-12-01), Kemp et al.
patent: 4504442 (1985-03-01), Rosenblatt et al.
patent: 4681739 (1987-07-01), Rosenblatt et al.
patent: 4880711 (1989-11-01), Luczak et al.
patent: 5008096 (1991-04-01), Ringo
patent: 5078908 (1992-01-01), Ripley et al.
patent: 5100652 (1992-03-01), Kross et al.
patent: 5391533 (1995-02-01), Peterson et al.
patent: 5435984 (1995-07-01), Daly et al.
patent: 5651996 (1997-07-01), Roozdar
patent: RE36064 (1999-01-01), Davidson et al.
patent: 6063425 (2000-05-01), Kross et al.
patent: 6077495 (2000-06-01), Speronello et al.
patent: 6123966 (2000-09-01), Kross
patent: 6171485 (2001-01-01), Küke
patent: 6200557 (2001-03-01), Ratcliff
patent: 6238643 (2001-05-01), Thangaraj et al.
patent: 6265343 (2001-07-01), Daly et al.
patent: 6287533 (2001-09-01), Khan et al.
patent: 2001/0001655 (2001-05-01), Kuke
patent: 2004/0071627 (2004-04-01), DiMascio
patent: 2005/0095192 (2005-05-01), DiMascio
patent: 0 365 501 (1990-04-01), None
patent: 791680 (1958-03-01), None
XP-002227957; JP 6271301; Suido Kiko Co Ltd; 1994; abstract.
White; Handbook of Chlorination and Alternative Disinfectants; Fourth Edition; 1999; pp. 1153-1202.
Gordan et al.; The Chemistry of Chlorine Dioxide, Progress in Inorganic Chemistry; vol. 15; 1972; pp. 201-286.
Helfferich; Ion Exchange; 1995; pp. 519-550.
Duolite Ion—Exchange Manual; Chemical Process Company; 1960.
Gates; The Chlorine Dioxide Handbook, Water Disinfection Series, AWWA; 1998.
Lewatit, Bayer AG; Catalytic Removal of Dissovled Oxygen from Water.
Dence et al.; Pulp Bleaching Principles and Practice; Tappi Press, 1996.
Simpson et al.; A Focus on Chlorine Dioxide: The “Ideal” Biocide.
Encyclopedia. Com; Mechanism of Catalysis
McPeak et al.; Iron in Water and Processes for its Removal; 21st Annual Liberty Bell Corrosion Course; 1983.
Manganese Greensand CR & IR; Inversand Company; 1998.
Masschelein; Chlorine Dioxide, Chemistry and Environmental Impact of Oxychlorine Compounds; Ann Arbor Science Publishers, Inc., 1979.
Sampson Allison H.
Sampson Richard L.
Jacobson & Holman PLLC
Nguyen Ngoc-Yen
LandOfFree
Methods for making chlorous acid and chlorine dioxide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods for making chlorous acid and chlorine dioxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for making chlorous acid and chlorine dioxide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3671093