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Alumina particles

  • US 4,952,389 A
  • Filed: 09/15/1989
  • Issued: 08/28/1990
  • Est. Priority Date: 09/15/1989
  • Status: Expired due to Term
First Claim
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1. Friable particles having an alumina content of at least about 98.5 weight percent, a surface area of less than about 1 m2 /g, an attrition resistance of less than about 0.3 weight % per hour when tested in an air jet apparatus, a particle size ranging from about 30 to about 110 microns, a tap density of about 1.3 to about 1.9 g/cc, a generally spherical shape, and sufficient porosity to hold catalytic quantities of catalytic metals.

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