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Open-cell glass crystalline porous material

United States Patent

September 3, 2002
View the Complete Patent at the US Patent & Trademark Office
Idaho National Laboratory - Visit the Technology Transfer and Commercialization Office Website
An open-cell glass crystalline porous material made from hollow microspheres which are cenospheres obtained from fly ash, having an open-cell porosity of up to 90 vol. % is produced. The cenospheres are separated into fractions based on one or more of grain size, density, magnetic or non-magnetic, and perforated or non-perforated. Selected fractions are molded and agglomerated by sintering with a binder at a temperature below the softening temperature, or without a binder at a temperature about, or above, the softening temperature but below the temperature of liquidity. The porous material produced has an apparent density of 0.3-0.6 g/cm.sup.3, a compressive strength in the range of 1.2-3.5 MPa, and two types of openings: through-flow wall pores in the cenospheres of 0.1-30 micrometers, and interglobular voids between the cenospheres of 20-100 micrometers. The porous material of the invention has properties useful as porous matrices for immobilization of liquid radioactive waste, heat-resistant traps and filters, supports for catalysts, adsorbents and ion-exchangers.
Anshits; Alexander G. (Krasnoyarsk, RU), Sharonova; Olga M. (Krasnoyarsk, RU), Vereshchagina; Tatiana A. (Krasnoyarsk, RU), Zykova; Irina D. (Krasnoyarsk, RU), Revenko; Yurii A. (Zheleznogorsk, RU), Tretyakov; Alexander A. (Zheleznogorsk, RU), Aloy; Albert S. (Saint-Petersburg, RU), Lubtsev; Rem I. (Saint-Petersburg, RU), Knecht; Dieter A. (Idaho Falls, ID), Tranter; Troy J. (Idaho Falls, ID), Macheret; Yevgeny (Idaho Falls, ID)
(Washington, DC)
09/ 721,962
November 27, 2000
The United States Government has certain rights in this invention including rights pursuant to contract DE-AC07-991D13727 awarded by the U. S. Department of Energy.