| US 7,550,645 B2 | ||
| Process and composition for the immobilization of radioactive and hazardous wastes in borosilicate glass | ||
| Anatoly Chekhmir, Ma'aleh Adumim (Israel); and Arthur Gribetz, Jerusalem (Israel) | ||
| Assigned to Geomatrix Solutions, Inc., New York, N.Y. (US) | ||
| Filed on Jan. 18, 2006, as Appl. No. 11/333,236. | ||
| Application 11/333236 is a continuation in part of application No. 11/068460, filed on Feb. 23, 2005, granted, now 7,019,189. | ||
| Claims priority of provisional application 60/546202, filed on Feb. 23, 2004. | ||
| Prior Publication US 2006/0189471 A1, Aug. 24, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G21F 9/16 (2006.01); G21F 1/00 (2006.01); B09B 3/00 (2006.01); C03C 3/118 (2006.01); C03C 3/091 (2006.01); C03C 3/087 (2006.01); C03C 3/064 (2006.01) | ||
| U.S. Cl. 588—11 [588/14; 588/15; 588/16; 588/252; 501/59; 501/66; 501/70; 501/77] | 11 Claims |
| 1. A process for immobilizing wastes in glass which achieves a high concentration of waste constituents (waste loading) comprising:
combining a waste stream having one or more of radionuclides, hazardous elements, and hazardous components with fluorine and
glass-forming components in proportion to achieve a mixture capable of forming a highly polymerized borosilicate glass consisting
essentially of about 1 to about 1.3 mole parts of a combination of monovalent cation oxides (R2O) and divalent cation oxides (RO), about 1 to about 1.4 mole parts trivalent cation oxides (R2O3), and about 1.2 to about 4.2 mole parts of a combination of tetravalent cation oxides (RO2) and pentavalent cation oxides (R2O5), wherein SiO2 is present in an amount greater than 30 weight percent, B2O3 is present in an amount between 8.7 and 15.3 weight percent, Al2O3 present in an amount between 7 and 15.1 weight percent, CaO is present in an amount between 0.2 and 2.3 weight percent, and
fluorine is present in an amount between about 1 to about 3 weight percent;
melting the mixture to form a melted glass with integrated waste; and
solidifying the melted glass with integrated waste by cooling to form said highly polymerized borosilicate glass.
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