Organic compounds -- part of the class 532-570 series – Organic compounds – Polycyclo ring system containing anthracene configured ring...
Patent
1997-03-26
1999-02-02
Jordan, Charles T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Polycyclo ring system containing anthracene configured ring...
C07D 5018
Patent
active
H00017876
ABSTRACT:
A regeneration method of a working solution is herein disclosed in which various by-products which do not participate in the production of hydrogen peroxide and which are present in the working solution in a hydrogen peroxide production process utilizing an anthraquinone method can efficiently be converted into anthraquinones effective as reaction media for the production of hydrogen peroxide.
The present invention is concerned with (1) a regeneration method of a working solution wherein at least a part of the unreduced working solution is brought into contact with a catalyst mainly comprising a .gamma.-alumina at a temperature of 40 to 150.degree. C., and (2) another regeneration method of a working solution wherein the working solution is brought into contact with a catalyst mainly comprising a .gamma.-alumina at a temperature of 20 to 150.degree. C. under conditions that a concentration h (mol/liter) of the alkyltetrahydroanthrahydroquinones in the working solution before the catalytic treatment meets the equation
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Sandelin, Fredrik, et al., "Kinetics of the Catalys Deactivation in the Recovery of Active Anthraquinones", Catalyst Deactivation (1994),Studies in Surface Science and Catalysis, vol. 88, 635-640 (1994).
Kato Kenji
Kato Tomio
Minato Kazuyuki
Ogasawara Kazuharu
Sumitani Makoto
Chelliah Meena
Jordan Charles T.
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