Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Reexamination Certificate
2006-08-15
2006-08-15
Anthony, Joseph D. (Department: 1714)
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
C252S186270, C252S186430
Reexamination Certificate
active
07090820
ABSTRACT:
A method of preparing a potassium monopersulfate composition is presented, wherein the potassium monopersulfate composition has the formula (KHSO5)x(KHSO4)y(K2SO4)z, where x+y+z=1 and x=0.46–0.64, y=0.15–0.37, and z=0.15–0.37, said potassium monopersulfate composition having an active oxygen content greater than or equal to 4.9 wt. % and K2S2O8at a concentration of <0.5 wt. % of the potassium monopersulfate composition. The method includes reacting an H2O2solution containing at least 70 wt. % H2O2with a H2SO4solution at a substoichiometric ratio of the H2SO4to H2O2to generate a weak Caro's acid solution, then combining the weak Caro's acid solution with oleum to produce a rich Caro's acid solution. The rich Caro's acid solution may be combined with an alkali potassium compound to produce the potassium monopersulfate composition. During the process, the temperature is maintained at below 30 ° C.
REFERENCES:
patent: 2802722 (1957-08-01), Stephanou
patent: 2926998 (1960-03-01), Stephanon et al.
patent: 3036885 (1962-05-01), Muller et al.
patent: 3939072 (1976-02-01), LaForte
patent: 4579725 (1986-04-01), Jayawant
patent: 4610865 (1986-09-01), Reh et al.
patent: 5139763 (1992-08-01), Amini
patent: 5141731 (1992-08-01), Meier et al.
patent: 5250280 (1993-10-01), Bertsch-Frank et al.
patent: 5429812 (1995-07-01), McDonogh et al.
patent: 5607656 (1997-03-01), Soicke et al.
patent: 6221826 (2001-04-01), Surutzidis et al.
patent: 2005/0031530 (2005-02-01), Martin
International Search Report and Written Opinion of the International Searching Authority for International application No. PCT/US04/31625 dated Jan. 18, 2006.
Anthony Joseph D.
DLA Piper Rudnick Gray Cary US LLP
TruOx, Inc.
LandOfFree
Potassium monopersulfate triple salt with increased active... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Potassium monopersulfate triple salt with increased active..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Potassium monopersulfate triple salt with increased active... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3633303