Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1993-03-04
1994-04-19
Corbin, David H.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
405128, 405266, 588257, B09B 300, E02D 312
Patent
active
053047060
ABSTRACT:
The invention relates to a fixing agent, for fixing organic and inorganic impurities containing material, which comprises an organophilic clay material and a clay-growth agent. The clay-growth agent comprises at least one magnesium compound and/or at least one aluminium compound, and an initiator for clay formation. This initiator is a silicon-containing material, such as a glass or a silicon-containing rock, such as pumice, basalt or andasite. The magnesium compound preferably originates from granulated blast furnace slags, or is magnesium oxide, whereas the aluminium compound is expediently aluminium oxide or an alumina containing material. An oxidising agent can also be present. A method for fixing organic and inorganic impurities containing material to an at least partially organophilic clay material in an aqueous medium, and, if desired, hardening the resulting material using an inorganic reagent and, where appropriate, a hardening activator, is also described. This method is in particular characterised in that the organic and inorganic impurities containing material is also fixed to and/or enclosed in clay material to be formed in situ. Finally, a synthetic clay material is described which can be obtained from a mixture of ferric sulphate, magnesium oxide and/or aluminium oxide, potassium persulphate, silicon oxide and, optionally, manganese sulphate and/or aluminium sulphate.
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patent: 3837872 (1974-09-01), Conner
patent: 4149968 (1979-04-01), Kupiec et al.
patent: 4386010 (1983-05-01), Hildebrant
patent: 4650590 (1987-03-01), Beall
patent: 4744829 (1988-05-01), Eirich et al.
patent: 5177305 (1993-01-01), Pichat
Corbin David H.
Pelt & Hooykaas B.V.
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