Chemistry of inorganic compounds – Oxygen or compound thereof – Peroxide
Patent
1990-02-23
1991-11-05
Langel, Wayne A.
Chemistry of inorganic compounds
Oxygen or compound thereof
Peroxide
C01B 15023
Patent
active
050630431
ABSTRACT:
The invention relates to a process in the continuous catalytic hydrogenation step during production of hydrogen peroxide according to the anthraquinone process by alternate reduction and oxidation of a working soloution of alkylated anthraquinones, said working solution being supplied at the upper end of the hydrogenation reactor and uniformly distributed across the surface of the monolithic catalyst bed, while simultaneously introducing hydrogen gas or hydrogen gas-containing gas, the flow of said working solution through the catalyst bed being adjusted such that the liquid flow is lower than the falling rate of the liquid through the bed, whereby gas bubbles are formed which have a diameter close to the diameter of the catalyst channels, and whereby such gas plugs and corresponding liquid plugs alternately and automatically flow downwardly through said channels and a so-called plug flow is obtained.
REFERENCES:
patent: 3009782 (1961-11-01), Porter
patent: 3755552 (1973-08-01), Lee et al.
patent: 4039430 (1977-08-01), Jensen
patent: 4428922 (1984-01-01), Hopkins
Chemical Abstracts, vol. 111, No. 13, CA No. 114576H, Sep. 1989.
Rastogi, Ashtutosh: "Kinetics of Benzene Hydrogenation on Iron-Zeolite Catalyst", General of Indian Chem. Soc., vol. LXV, Dec. 1988, pp. 838-843.
Eka Nobel AB
Langel Wayne A.
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