High strength shaped aluminas and a method of producing such high strength shaped aluminas
OwnerDavid A. Barclay, Mark M. Chavezinventors
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Abstract
A method of producing high strength shaped alumina by feeding alumina power into an agglomerator having a shaft with mixers able to displace the alumina power along the shaft, spraying a liquid binder onto the alumina power as it is displaced along the shaft to form a shaped alumina, and calcining the shaped alumina. The shaped alumina produced having a loose bulk density of greater than or equal to 1.20 g/ml, a surface area less than 10 m2/g, impurities of less than 5 ppm of individual metals and less than 9 ppm of impurities in total, and/or crush strength of greater than 12,000 psi.
Claims9
A method of producing a shaped alumina comprising:
- i) providing an alumina powder having a crystallite size of between to 325 Å and 450 Å
- ii) feeding the alumina powder into an agglomerator, the agglomerator including a shaft with mixers able to displace the alumina powder along a length of the shaft
- iii) spraying a liquid binder onto the alumina powder as it is displaced along the length of the shaft of the agglomerator to form a shaped alumina, and
- iv) calcining the shaped alumina.
Dependencies are inferred from the claim text.