Process for the separation of catalyst-free working solution...

Details Process for the separation of catalyst-free working solution... Process for the separation of catalyst-free working solution...

B - Operations, Transporting

01

D

B01D 61/14 (2006.01) B01J 8/00 (2006.01) C01B 15/023 (2006.01)

Patent

CA 2096766

ABSTRACT OF THE DISCLOSURE The invention relates to a process for the separation of catalyst-free working solution from working solution containing palladium black from the hydrogenation circuit of the anthraquinone process for the production of hydrogen peroxide. The problem addressed by the invention was to improve the separation of a catalyst-free working solution from the hydrogenation circuit containing Pd black, which was previously carried out using filter candles, in order to reduce the process costs. This problem is solved by the use of a micro-filter operating on the crossflow principle with a filter membrane of ceramic material, more particularly .alpha.-aluminium oxide, or polyolefin with an average pore diameter of 0.1 to 3.0 µm. The crossflow rate is generally 0.5 to 5 m/sec.

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