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:
Sep. 03, 2002
Filed:
Nov. 27, 2000
Alexander G. Anshits, Krasnoyarsk, RU;
Olga M. Sharonova, Krasnoyarsk, RU;
Tatiana A. Vereshchagina, Krasnoyarsk, RU;
Irina D. Zykova, Krasnoyarsk, RU;
Yurii A. Revenko, Zheleznogorsk, RU;
Alexander A. Tretyakov, Zheleznogorsk, RU;
Albert S. Aloy, Saint-Petersburg, RU;
Rem I. Lubtsev, Saint-Petersburg, RU;
Dieter A. Knecht, Idaho Falls, ID (US);
Troy J. Tranter, Idaho Falls, ID (US);
Yevgeny Macheret, Idaho Falls, ID (US);
The United States of America as represented by the United States Department of Energy, Washington, DC (US);
Abstract
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 , 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.