| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 10.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Method of extracting Ca from aq mixt comprising said sludge, the mixt comprising solid & liquid phases - Combining mixt with acid to solubilize all Ca - Incubating mixt - Separating liquid fraction comprising dissolved non-Ca salts & all Ca salts - Precipitating non-Ca salts, but not the Ca salts from liquid fraction by raising pH - Removing ppcc & recovering Ca salt from liquid fraction by subsequent precipitation |
| PATENT PHOTOCOPY | Available on request |
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