Process for treatment of waste

Details Process for treatment of waste Process for treatment of waste

1981-10-02

1983-09-13

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

106 76, 106117, 106119, 210712, 210716, 210724, 210751, 210912, 210913, 210914, 405263, C02F 152, C02F 1114

Patent

active

044041055

ABSTRACT:
Process for the irreversible treatment of toxic waste by means of a silicate, in the presence of water, in such a way as to form a solid aggregate includes treatment of the silicate in an acid medium, for the purpose of obtaining silicic acid of low molecular weight; mixing the silicic acid with the waste to be treated, in the presence of water and controlling the pH between 0 and 4 in a sufficiently acid medium to cause the waste to undergo at least partial solution; precipitation of a gel of high molecular weight from the resultant aqueous mixture; addition thereto of a mixture which reacts with the gel of high molecular weight to form a silicate, possibly in the presence of a cementation agent, in such a way as to produce a sludge, and the hardening of the sludge into a solid aggregate which can not be changed physically so as to release again the harmful or toxic waste into the environment.

REFERENCES:
patent: 2217466 (1940-10-01), Baylis
patent: 2746920 (1956-05-01), Wunderley
patent: 3094846 (1963-06-01), Peeler
patent: 3388060 (1968-06-01), Clark
patent: 3720609 (1973-03-01), Smith et al.
patent: 3837872 (1974-09-01), Conner
patent: 3841102 (1974-10-01), Cinner et al.
patent: 3980558 (1976-09-01), Thompson
patent: 4116705 (1978-09-01), Chappell

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