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Open-cell glass crystalline porous material

Patent ·
OSTI ID:874700
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3];  [4];  [4];  [4]
  1. Krasnoyarsk, RU
  2. Zheleznogorsk, RU
  3. Saint-Petersburg, RU
  4. Idaho Falls, ID
+ Show Author Affiliations

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.

Research Organization:
BECHTEL BWXT IDAHO LLC
DOE Contract Number:
AC07-99ID13727
Assignee:
The United States of America as represented by the United States Department (Washington, DC)
Patent Number(s):
US 6444162
OSTI ID:
874700
Country of Publication:
United States
Language:
English

References (6)

The study of composition of novel high temperature catalysts for oxidative conversion of methane journal July 1998
The polymorphism of some rare earth oxides and their reaction with water journal May 1964
Development and Testing of a New Porous Crystalline Matrix (Gubka) for Stabilizing Actinide Solutions journal January 1999
The possibilities of237Np and241Am disposal by transmutation in their irradiation with thermal neutrons in porous immobilizing agents journal March 1991
Novel microdesign of oxidation catalysts. Part 1. Glass crystal microspheres as new catalysts for the oxidative conversion of methane journal July 1998
Novel microdesign of oxidation catalysts. Part 2. The influence of fluorination on the catalytic properties of glass crystal microspheres journal July 1998

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Related Subjects

/264/501/
01-30
03-06
12-35
20-100
90
adsorbents
agglomerated
apparent
ash
based
below
binder
catalysts
cenospheres
compressive
crystalline
density
filters
fly
fly ash
fractions
gcmsup3
glass
grain
grain size
heat-resistant
hollow
hollow microspheres
immobilization
interglobular
ion-exchangers
liquid
liquidity
magnetic
material
matrices
micrometers
microspheres
molded
mpa
non-magnetic
non-perforated
obtained
open-cell
openings
perforated
pores
porosity
porous
produced
properties
radioactive
radioactive waste
range
selected
separated
sintering
size
softening
strength
supports
temperature
through-flow
traps
types
useful
voids
vol
wall
waste