公开(公告)号：CA2096766A1

公开(公告)日：1993-11-26

申请号：CA2096766

申请日：1993-05-21

Applicant: DEGUSSA

Inventor： EICKHOFF HUBERT ,  SCHIRRMACHER RUEDIGER ,  MANGARTZ KARL-HEINZ ,  HUBER HANS-MARTIN ,  GOEDECKE RALF

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

Abstract: 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 .mu.m. The crossflow rate is generally 0.5 to 5 m/sec.

公开(公告)号：NO931874D0

公开(公告)日：1993-05-24

申请号：NO931874

申请日：1993-05-24

Applicant: DEGUSSA

Inventor： EICKHOFF HUBERT ,  SCHIRRMACHER RUEDINGER ,  MANGARTZ KARL-HEINZ ,  HUBER HANS-MARTIN ,  GOEDECKE RALF

IPC: B01D39/16 ,  B01D39/20 ,  B01D61/14 ,  B01D71/00 ,  B01J8/00 ,  C01B15/013 ,  C01B15/023 ,  C01B

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.