Patent Number: RE0339555
Section: claims

1. An improved method of solidifying a radioactive or hazardous liquid comprising placing said liquid in a container and adding only sodium montmorillonite to said liquid in a ratio of sodium montmorillonite:liquid of between about 3:1 and 1:7, respectively, until the composition comprises an unpourable, free standing solid. 2. A method of solidifying a radioactive or hazardous liquid comprising at least about 95% water by adding only sodium montmorillonite having a major portion of particles between about 3/8 inch and 20 mesh thereto in a sodium montmorillonite:liquid ratio of between about 1:2 and about 1:7, respectively, in fractions with at least a few minutes interval between fractions, until the composition comprises .[.an unpourable,.]. .Iadd.a .Iaddend.free standing solid. 3. The method of claim 2 wherein each of said fractions is between about 10 and 50% of the total amount added. 4. The method of claim 2 wherein each of said fractions is between about 1/3 and 1/4 of the total amount added and wherein the intervals between fraction additions is at least about 10 minutes. 5. The method of claim 2 comprising placing between about 40 and 50 gallons of said liquid in a 55 gallon drum, and adding between about 150 and about 175 pounds of sodium montmorillonite to said liquid in fractions of between about 40 and about 55 pounds with at least about 10 minute intervals between fractions. 6. A method of solidifying a radioactive or hazardous liquid comprising at least about 5% hydrocarbon by adding only sodium montmorillonite having a major portion of particles of about 200 mesh or smaller thereto in a sodium montmorillonite:liquid ratio of between about 1:2 and 3:1, respectively, with stirring, until the composition comprises .[.an unpourable,.]. .Iadd.a .Iaddend.free standing solid. .Iadd.7. An improved method of solidifying a radioactive or hazardous liquid comprising adding only sodium montmorillonite to said liquid in a ratio of sodium montmorillonite:liquid of between about 3:1 and 1:7, respectively, until the composition comprises a free standing solid. .Iaddend.