Hazardous or toxic waste destruction or containment – Processes for making harmful chemical substances harmless,... – Harmful chemical substances made harmless – or less harmful,...
Reexamination Certificate
2008-04-22
2008-04-22
Johnson, Edward M. (Department: 1754)
Hazardous or toxic waste destruction or containment
Processes for making harmful chemical substances harmless,...
Harmful chemical substances made harmless, or less harmful,...
Reexamination Certificate
active
07361801
ABSTRACT:
The present invention relates to a method of immobilizing aqueous waste, including low level nuclear waste, by converting the waste to a solid. Solidification is accomplished with the addition of a compound having the formula Me(II)O or Me(II)(OH)2in combination with compounds of the general formula Me(II)O.R2O3, R2O3, R(OH)3or ROOH, where Me is a cation selected from the group consisting of Ca, Ba, Sr, Mn, and Zn, and R is selected from the group consisting of Al, Fe and Cr. Exemplary compounds of the above formula include commercially available calcium aluminate cements, which when added to the waste in combination with a hydroxide of a divalent metal, bind the nitrate ions or nitrite ions in the waste and convert it to a solid.
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352 East Irvin Avenue Limited Partnership
Cillo Daniel P.
Eckert Seamans Cherin & Mellott , LLC
Johnson Edward M.
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