04257898 is referenced by 4 patents and cites 6 patents.

The invention relates to a method of processing the waste sludge obtained in purification facilities for phosphoric acid produced by the wet process. The composition of this sludge is such that it cannot be utilized for any purpose in this state. It is known that sludge from wet phosphoric acid purification facilities contains different quantities of certain substances, the concentrations being such that these substances may not be allowed to mix with surface water or ground water under any circumstances, not even in the case of dumps. A typical composition of such waste sludge is as follows:

Title
Method of processing waste sludge from wet phosphoric acid purification facilities
Application Number
6/99530
Publication Number
4257898
Application Date
December 3, 1979
Publication Date
March 24, 1981
Inventor
Rudiger Scheel
Schwerte
DE
Fritz Meininghaus
Dortmund
DE
Martin Hater
Dortmund
DE
Peter Meurer
Herdecke-Ende
DE
Agent
Wilson Fraser Barker & Clemens
Assignee
Uhde
DE
IPC
C02F 1/00
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