Liquid purification or separation – Processes – Chemical treatment
Patent
1984-05-02
1985-10-15
Wyse, Thomas
Liquid purification or separation
Processes
Chemical treatment
210919, 106 85, C04B 100, C02F 1114
Patent
active
045472904
ABSTRACT:
According to the process, a clay material is first dispersed with stirring in the waste (or vice versa) between 0.degree. and 150.degree. C. then, in particular in the case of acidic wastes, it is neutralized to an approximately neutral pH by a product preferably with a lime base and, in a third phase, a hydraulic and/or calcium binder is added to the mixture. Application to petrification of all types of wastes of industrial, mining, urban and other origins.
REFERENCES:
patent: 2679537 (1954-05-01), Knowlton
patent: 3694356 (1972-09-01), Vander Horst
patent: 4116705 (1978-09-01), Chappell
patent: 4149968 (1979-04-01), Kopiec et al.
patent: 4229295 (1980-10-01), Krofchak
patent: 4338134 (1982-07-01), Munster
patent: 4375986 (1983-03-01), Pichat
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