Methods for producing sintered particles from a slurry of an alumina-containing raw material
US7615172B2 · kind B2 · utility
9Cited by
115References
12Claims
0Family size
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Key dates
| Filing date | Mar 1, 2006 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | May 25, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods for producing substantially round, spherical and sintered particles from a slurry of a calcined, uncalcined or partially calcined raw material having an alumina content of more than 55% by weight, and a mullite growth promoter in an amount of from about 2 to about 10% dry weight of the total solids in the slurry. Methods for using such substantially round, spherical and sintered particles in hydraulic fracturing operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.