High pH dispersible nano-aluminas

Details High pH dispersible nano-aluminas High pH dispersible nano-aluminas

2006-09-05

2006-09-05

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S626000, C423S111000, C977S773000, C977S811000

Reexamination Certificate

active

07101528

ABSTRACT:
A process for producing nano sized boehmite aluminas which are stable at alkaline pH values wherein an aqueous medium of a peptized boehmite alumina is treated with a water dispersible polycarboxylic acid polymer and optionally with an organic water dispersible base having a molecular weight ranging from 500 to 3000 and having no more than three basic groupings to produce a treated boehmite alumina which forms a stable sol at a pH of greater than 6, the treated boehmite alumina having a dispersed particle size of less than 500 nm in the sol.

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