Abstract: Disclosed are sorbents and sorbent systems made from lightweight expanded silicate aggregates derived from rice hull ash and processes for sorbing liquids using such sorbents and sorbent systems.
Abstract: Disclosed is a lightweight silicate aggregate produced by the steps of mixing together dry rice hull ash, an alkali metal hydroxide, boric acid, and water; heating the mixture to a temperature sufficient to initiate reaction; curing the composition at a temperature less than the boiling point of water until the reaction is complete; comminuting the cured product and heating the comminuted product to form the expanded aggregate. The expanded aggregate is useful as, inter alia, a sorbent, filler, energy insulator or filter.
Type:
Grant
Filed:
February 13, 1984
Date of Patent:
February 18, 1986
Assignee:
Molly Maguire, Inc.
Inventors:
John D. Goodwin, Forrest W. Mulkey, III
Abstract: Disclosed is a process for making a lightweight silicate aggregate. The process includes the steps of mixing together dry rice hull ash, an alkali metal hydroxide, boric acid, and water; heating the mixture to a temperature sufficient to initiate reaction; curing the composition at a temperature less than the boiling point of water until the reaction is complete; comminuting the cured product and heating the comminuted product to form the expanded aggregate.
Type:
Grant
Filed:
January 24, 1983
Date of Patent:
December 18, 1984
Assignee:
Molly Maguire, Inc.
Inventors:
John D. Goodwin, Forrest W. Mulkey, III