Method of separating catalyst-free working solution from the hyd

Details Method of separating catalyst-free working solution from the hyd Method of separating catalyst-free working solution from the hyd

1995-03-20

1996-07-09

Langel, Wayne

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210651, 423588, B01D 6100, C02F 144

Patent

active

055341497

ABSTRACT:
A method is shown for the separation of catalyst-free working solution from working solution, containing noble-metal black, especially palladium black as catalyst, of the hydrogenation cycle of the so-called anthraquinone method for the production of hydrogen peroxide by filtration of the catalyst-containing working solution using filter candles. The filter candles are formed of an open-pore support body based on a carbon material or metallic or ceramic material with an average pore width in a range of 5 to 100 .mu.m and of a single-layer or multi-layer membrane of ceramic material with an average pore width in a range of at least about 1 up to 10 .mu.m located on the outside surface of the support body.

REFERENCES:
patent: 3433358 (1969-03-01), Herzog et al.
patent: 4428923 (1984-01-01), Kunkel et al.
patent: 5348657 (1994-09-01), Eickhoff et al.
Literature Article Process Technology, vol. 26, Jun. 1992, p. 315.
Ullmann's Encyclopedia of Industrial Chemistry, Fifth Edition, vol. A13, pp. 447-457. (no date available).

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