Fluidizable particulate materials and methods of making same

Gupta, Raghubir P

Title: Fluidizable particulate materials and methods of making same

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Abstract

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.

Inventors:

Gupta, Raghubir P ^[1]

Durham, NC

Issue Date:: 1999-01-01

Research Org.:: RTI International, Research Triangle Park, NC (United States)

OSTI Identifier:: 872609

Patent Number(s):: 5972835

Assignee:: Research Triangle Institute (Research Triangle Park, NC)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B01J20/28004 - {Sorbent size or size distribution, e.g. particle size}
B01J37/0045 - {Drying a slurry, e.g. spray drying}
B01J20/12 - Naturally occurring clays or bleaching earth
B01J20/103 - {comprising silica}
B01J20/28019 - {Spherical, ellipsoidal or cylindrical}
B01J20/10 - comprising silica or silicate
B01J20/06 - comprising oxides or hydroxides of metals not provided for in group B01J20/04
B01J20/045 - {containing sulfur, e.g. sulfates, thiosulfates, gypsum}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S502/504 - Abrasion resistance
Y10S502/514 - Process applicable either to preparing or to regenerating or to rehabilitating catalyst or sorbent

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
B01J20/2803 - {Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products}
B01J20/08 - comprising aluminium oxide or hydroxide
B01J20/3078 - {Thermal treatment, e.g. calcining or pyrolizing}

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DOE Contract Number:: AC21-88MC25006

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 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/

Citation Formats


                    Gupta, Raghubir P. Fluidizable particulate materials and methods of making same.  United States: N. p., 1999. 
        Web.

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                    Gupta, Raghubir P. Fluidizable particulate materials and methods of making same.  United States.

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                    Gupta, Raghubir P. Fri .  
        "Fluidizable particulate materials and methods of making same".  United States.  https://www.osti.gov/servlets/purl/872609.

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@article{osti_872609,

  title        = {Fluidizable particulate materials and methods of making same},

  author       = {Gupta, Raghubir P},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1999},

  month        = {1}

}

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