Zirconium basic carbonate and methods of making the same
US7101519B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2004 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Jan 7, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/82
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.