Particulate ceramic useful as a proppant
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United States of America Patent
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Jul 31, 1990
Issued Date -
N/A
app pub date -
Jan 21, 1986
filing date -
Jan 18, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for making particulate ceramics having an alumina rich region near their surface, comprising the following steps: (a) mixing and pelletizing, with the aid of water, raw materials including a mineral particulate such as nepheline syenite and a binder such as bentonite; (b) drying the wet pellets from step (a); (c) mixing the dried pellets with alumina parting agent; and (d) firing the mixture of pellets and parting agent at a sufficient temperature (less than 1450.degree. C.) and for sufficient time for vitrification to occur.
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