Patent Number: 044877110
Section: description

The following example further illustrates this invention. EXAMPLE A 1866 gram mixture was prepared of 30 percent silicon tetraethoxide, 8.5 percent percent boron triethoxide and 61.5 percent percent alcohol. To this mixture was added 2614 grams of water. The mixture was then heated to 148.degree. F. until all of the alcohol had volatilized. A simulated PUREX waste was prepared having the following composition (in percent): __________________________________________________________________________ Na.sub.2 SO.sub.4.10H.sub.2 O 15.8 Al(OH).sub.3 0.007 Fission Products NaNO.sub.3 40.6 AlF.sub.3 0.1 SrO 0.002 NaNO.sub.2 32.9 Na.sub.3 PO.sub.4 -- 12MoO.sub.3 0.8 RuO.sub.2 0.003 NaOH 1.2 MnO.sub.2 0.2 Ba(OH).sub.2.8H.sub.2 O 0.1 NaCl 0.004 Na.sub.2 U.sub.2 O.sub.7 1.0 Ca(OH) 0.006 Fe(OH).sub.3 3.8 ZrO.sub.2 0.002 FePO.sub.4 2.3 Rare Earths Cr(OH).sub.3 0.5 Eu.sub.2 O.sub.3 0.1 Ni(OH).sub.2 0.2 CeO.sub.2 0.006 __________________________________________________________________________ 578 grams of the simulated waste was heated to 212.degree. F. to drive off water and concentrate the waste to 500 grams. To this was added 200 grams of the de-alcoholated alkoxide mixture. The resulting mixture was heated until the temperature reached 600.degree. C. which produced coherent solid cinders about 1/8 to about 1/4 inch in size. These cinders were soaked in 15,000 grams of 25 percent ammonium hydroxide for 16 hours which resulted in the complete disintegration of the cinders. The resulting slurry was then heated at 130.degree. F. until the ammonia was volatilized.