Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal
Reexamination Certificate
2006-09-05
2006-09-05
Hendrickson, Stuart L. (Department: 1754)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ivb metal
C423S084000, C423S420200, C423S419100, C423S421000, C423S186000
Reexamination Certificate
active
07101519
ABSTRACT:
Methods of making zirconium basic carbonate are further described which involve titrating an aqueous slurry of sodium zirconium carbonate to a pH of from about 3.5 to about 4.0 with an acidic agent wherein the sodium zirconium carbonate has a moisture content of from about 15% to about 25% LOD in solid form. The process further involves washing the aqueous slurry containing the formed zirconium basic carbonate with water. A novel zirconium basic carbonate is further disclosed which has a minimum adsorption capacity of from about 30 to about 35 mg/PO4-P/gm SCZ; a minimum HCO3- content of from about 2 to about 4 mEq HCO3-gm/SCZ; a leachable Na+content of from about 1.5 to about 2.0 mEq Na+/gm SCZ; and/or a pH range of titrated sodium zirconium carbonate of from about 6 to about 7.
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Hendrickson Stuart L.
Kilyk & Bowersox P.L.L.C.
Raetzsch Alvin
Renal Solutions, Inc.
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