Fluidizable particulate materials and methods of making same

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872609

Gupta, Raghubir P ^[1]

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1. Durham, NC

The invention provides fluidizable, substantially spherical particulate material of improved attrition resistance having an average particle size from about 100 to about 400 microns useful as sorbents, catalysts, catalytic supports, specialty ceramics or the like. The particles are prepared by spray drying a slurry comprising inorganic starting materials and an organic binder. Exemplary inorganic starting materials include mixtures of zinc oxide with titanium dioxide, or with iron oxide, alumina or the like. Exemplary organic binders include polyvinyl alcohol, hydroxypropylemethyl cellulose, polyvinyl acetate and the like. The spray dried particles are heat treated at a first temperature wherein organic binder material is removed to thereby provide a porous structure to the particles, and thereafter the particles are calcined at a higher temperature to cause reaction of the inorganic starting materials and to thereby form the final inorganic particulate material.

• Research Organization: RTI International, Research Triangle Park, NC (United States)
• DOE Contract Number: AC21-88MC25006
• Assignee: Research Triangle Institute (Research Triangle Park, NC)
• Patent Number(s): US 5972835
• OSTI ID: 872609
• Country of Publication: United States
• Language: English

Related Subjects

fluidizable
particulate
materials
methods
provides
substantially
spherical
material
improved
attrition
resistance
average
particle
size
100
400
microns
useful
sorbents
catalysts
catalytic
supports
specialty
ceramics
particles
prepared
spray
drying
slurry
comprising
inorganic
starting
organic
binder
exemplary
mixtures
zinc
oxide
titanium
dioxide
iron
alumina
binders
polyvinyl
alcohol
hydroxypropylemethyl
cellulose
acetate
dried
heat
treated
temperature
removed
provide
porous
structure
thereafter
calcined
reaction
form
final
vinyl acetate
attrition resistance
organic binders
polyvinyl alcohol
slurry comprising
organic binder
porous structure
starting material
zinc oxide
particulate material
particle size
iron oxide
starting materials
heat treated
titanium dioxide
substantially spherical
average particle
spray drying
particulate materials
provides fluid
comprising inorganic
microns useful
ethyl cellulose
dried particles
methyl cellulose
vinyl alcohol
/502/