The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2008
Filed:
Aug. 27, 2003
Paul W Brown, State College, PA (US);
Paul W Brown, State College, PA (US);
352 East Irvin Avenue Limited Partnership, State College, PA (US);
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)in combination with compounds of the general formula Me(II)O.RO, RO, R(OH)or 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.