High strength shaped aluminas and a method of producing such high strength shaped aluminas
US11091396B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | May 20, 2017 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | May 20, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.