公开(公告)号：SI9300278A

公开(公告)日：1993-12-31

申请号：SI9300278

申请日：1993-05-24

Applicant: DEGUSSA

Inventor： EICKHOFF HUBERT ,  SCHIRRAMACHER RUDIGER ,  MANGARTZ KARL-HEINZ ,  HUBER HANS-MARTIN ,  GOEDECKE RALF

IPC: B01D39/16 ,  B01D39/20 ,  B01D61/14 ,  B01D71/00 ,  B01J8/00 ,  C01B15/013 ,  C01B15/023 ,  B01D71/02 ,  B01D71/26

Abstract: The invention relates to a process for the separation of catalyst-free working solution from working solution containing palladium black, of the hydrogenation cycle of the anthraquinone process for the preparation of hydrogen peroxide. The object of the invention was to improve the separation of a catalyst-free working solution from the hydrogenation cycle containing palladium black, which separation had previously been carried out using filter cartridges, and thus to reduce the process costs. The object is achieved by employing a microfilter which operates according to the cross-current principle and has a filter membrane made of ceramic material, especially alpha -alumina or polyolefin having a mean pore width in the range from 0.1 to 3.0 mu m; the cross-current velocity is in general from 0.5 to 5 m/sec.