04478725 is referenced by 40 patents and cites 3 patents.

Hydrogen sulphide in the waste water from a coal gasification installation is subjected to an oxidizing treatment in the presence of the very fine-grain residual coke which, being washed out of the product gas, is suspended in the waste water, the residual coke particles thus serving as a catalyst. When using air for the oxidation treatment, with the usual period of treatment, it is possible to achieve virtually quantitative conversion of the hydrogen sulphide to sulphate. If the solid particles are to be removed from the waste water by a flotation step, the flotation operation and the oxidizing treatment can be performed simultaneously in a common apparatus.

Title
Process for the oxidation of hydrogen sulphide dissolved in the waste water from a coal gasification process
Application Number
6/476574
Publication Number
4478725
Application Date
March 18, 1983
Publication Date
October 23, 1984
Inventor
Norbert Brungel
Cologne
DE
Gunther Velling
Bornheim
DE
Agent
Howson and Howson
Assignee
Rheinische Braunkohlenwerke
DE
IPC
C02F 1/72
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