公开(公告)号：DE3025353A1

公开(公告)日：1982-01-28

申请号：DE3025353

申请日：1980-07-04

Applicant: BASF AG

Inventor： DACHAUER HANS DIPL ING DR ,  MARQUARDT SIEGFRIED ING GRAD ,  STICKEL RICHARD DIPL ING

IPC: C02F1/28 ,  C02F3/06 ,  C02F3/12 ,  C02F3/26 ,  C02F1/72

Abstract: Purificn. of waste water contaminated with organic impurities comprises treatment with 2 or more sequential columns of active charcoal, the first (at least) of which is supplied with air or an oxygen-contg. gas, esp. pure oxygen. Pref. the gas- treated columns are operated at up to 100, esp. 20-80, deg. C and the gas treatment is esp. carried out in a fluidised bed of charcoal. Treatment with the gas reduced the amt. of charcoal which needs to be regenerated and thus lowers charcoal losses. The degree of purifcn. reached is as good as that acheived with other methods and often better, so that additional purificn. stages are not required.

公开(公告)号：DE2639342A1

公开(公告)日：1978-03-02

申请号：DE2639342

申请日：1976-09-01

Applicant: BASF AG

Inventor： DIEM HANS DIPL CHEM DR ,  DUDECK CHRISTIAN DIPL CHEM DR ,  SIMMLER WERNER DIPL ING DR ,  MARQUARDT SIEGFRIED ING GRAD ,  STINGL WALTER

IPC: B01J23/50 ,  B01J37/16 ,  C07C45/38 ,  C07C47/055

Abstract: An improved process for the manufacture of silver catalysts, in which the silver is applied to conventional dimensionally stable and chemically inert carriers, eg. alumina or quartz moldings, preferably by electroless deposition from silver salt solutions onto a great variety of surfaces acting as carriers, by the use of suitable reducing agents. In a particular embodiment, a uniform deposition of silver and a dense and well-adhering silver layer on the surface of the carrier are achieved by adding certain materials to the silver salt solutions.