Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Reexamination Certificate
2008-04-11
2011-11-22
Vanoy, Timothy (Department: 1734)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
C423S544000, C428S457000, C428S458000, C428S480000, C428S689000, C424S618000, C523S122000, C524S423000
Reexamination Certificate
active
08062615
ABSTRACT:
An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipitating particles comprising primarily silver sulfate, wherein the reaction and precipitation are performed in the presence of an aqueous soluble carboxylic acid additive or salt thereof, the amount of additive being a minor molar percentage, relative to the molar amount of silver sulfate precipitated, and effective to result in precipitation of particles comprising primarily silver sulfate having a mean grain-size of less than 70 micrometers.
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Blanton Thomas N.
Sandford David W.
Eastman Kodak Company
Tucker J. Lanny
Vanoy Timothy
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