Method for flocculating suspensions containing swelled layered chalcogenide
AssigneeMobil Oil Corporation
InventorsGarry W. Kirker, Sowmithri Krishnamurthy
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Abstract
A method is disclosed for flocculating suspensions containing (a) layered oxide materials intercalated with a hydrophobic swelling agent and (b) nonintercalated hydrophobic swelling agent. The suspension is contacted with a ketone, water, and a cationic organic polymer; the resulting mixture is maintained at a sufficiently alkaline pH to prevent removal of the intercalated swelling agent during the flocculation treatment. This method is particularly useful for preparing swelled layered chalcogenide materials for the introduction of interspathic polymeric chalcogenide precursors in order to form a thermally stable product.
Claims15
A method for flocculating an aqueous suspension comprising (1) a solid layered chalcogenide material having ion exchange sites and swelled with an intercalated hydrophobic swelling agent and (2) nonintercalated, excess hydrophobic swelling agent;
- which method comprises (a) contacting said suspension with ketone, water, and a cationic organic polymeric flocculant;
- (b) maintaining the resulting mixture at a sufficiently alkaline pH to prevent exchange of said intercalated hydrophobic swelling agent;
- and (c) separating said swelled layered chalcogenide material from said aqueous mixture;
- whereby said layered chalcogenide material remains swelled after said separating.
Dependencies are inferred from the claim text.