Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Silicon containing
Reexamination Certificate
2008-07-03
2011-12-27
Silverman, Stanley (Department: 1736)
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Silicon containing
C423S335000, C423S336000, C423S337000, C423S338000, C423S339000, C423S340000
Reexamination Certificate
active
08084392
ABSTRACT:
A method of producing a range of diatomaceous earth filter aids having selectable permeabilities and less than about 1 percent by weight total crystalline silica. The method includes milling diatomaceous earth ore to a size range of between about 100 micrometers and about 1400 micrometers; calcining the milled diatomaceous earth in a calciner; and milling the calcined diatomaceous earth in an adjustable milling and classification system to produce diatomaceous earth filter aids. Systems to implement such methods and compositions produced by such methods are also described.
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Lenz Peter E.
Nannini Michael J
Shui James S
EP Minerals, LLC
Liao Diana J
Miller Matthias & Hull LLP
Silverman Stanley
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