发明名称 |
Förfarande för produktion av kalciumkarbonat från avfalls- och biprodukter |
摘要 |
<p>The present invention concerns a method for producing calcium carbonate containing the steps of extraction of alkaline industrial waste or by-products using as a first extraction solvent an aqueous solution of a salt formed from a weak acid and a weak base, whereby a vanadium-enriched first residue is allowed to settle and a calcium-rich first filtrate is formed, filtration, whereby the first filtrate is separated from the first residue, carbonation of the calcium-rich first filtrate using a carbonation gas, whereby calcium carbonate precipitates and a second filtrate is formed, and a second filtration, whereby the calcium carbonate is separated from the second filtrate. Further, the present invention concerns a method for extracting calcium carbonate and vanadium from alkaline industrial waste or by-products.</p> |
申请公布号 |
FI122348(B) |
申请公布日期 |
2011.12.15 |
申请号 |
FI20080005524 |
申请日期 |
2008.05.30 |
申请人 |
AALTO-KORKEAKOULUSAEAETIOE;RAUTARUUKKI OYJ;AEBO AKADEMI |
发明人 |
TEIR, SEBASTIAN;ELONEVA, SANNI;REVITZER, HANNU;ZEVENHOVEN, RON;SALMINEN, JUSTIN;FOGELHOLM, CARL-JOHAN;POEYLIOE, ESKO |
分类号 |
C01F11/18;C22B7/04;C22B26/20;C22B34/22 |
主分类号 |
C01F11/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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