Process for solidification of strongly acidic or akaline liquid

Liquid purification or separation – Processes – Chemical treatment

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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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