Chemistry of inorganic compounds – Oxygen or compound thereof – Peroxide
Reexamination Certificate
2007-07-13
2009-10-13
Mayes, Melvin C (Department: 1793)
Chemistry of inorganic compounds
Oxygen or compound thereof
Peroxide
C423S588000
Reexamination Certificate
active
07601323
ABSTRACT:
The present invention provides a method for producing hydrogen peroxide, comprising the steps of: alternately reducing and oxidizing a working solution containing anthraquinone compounds as a reaction medium, wherein a mixture of alkyl-substituted anthraquinones and alkyl-substituted tetrahydroanthraquinones in a molar ratio of from 2:1 to 8:1 is used as the anthraquinone compounds in the working solution, in the reduction step all of the tetrahydroanthraquinones and some or all of the anthraquinones in the working solution are reduced; and keeping the content of alkyl-substituted anthrahydroquinones in the working solution after the reduction step and before the oxidation step higher than the content of alkyl-substituted tetrahydroanthrahydroquinones, wherein ethylanthraquinone and ethyltetrahydroanthraquinone are used as anthraquinone compounds in the working solution in a total proportion of both of from 10 to 45 mol % of all of the anthraquinone compounds in the working solution.
REFERENCES:
patent: 5399333 (1995-03-01), Kato et al.
patent: 6153169 (2000-11-01), Glenneberg et al.
patent: 0 603 624 (1994-06-01), None
patent: 1 101 733 (2001-05-01), None
patent: 943 683 (1963-12-01), None
patent: 06-191803 (1994-07-01), None
patent: 2001-163608 (2001-06-01), None
patent: 2002-511377 (2002-04-01), None
patent: WO 95/28350 (1995-10-01), None
Goor, G., et al.: “Hydrogen Peroxide”, Ullmann's Encyclopedia of Industrial Chemistry, vol. A13, pp. 447-457, 1989.
Hagiwara Isao
Hasegawa Hiroshi
Iura Katsuhiro
Matsuda Hisashi
Sakaitani Hisashi
Mayes Melvin C
Mitsubishi Gas Chemical Company Inc.
Morgan & Lewis & Bockius, LLP
Stalder Melissa
LandOfFree
Method for producing hydrogen peroxide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing hydrogen peroxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing hydrogen peroxide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4056122