METHOD OF PRODUCING CALCIUM CARBONATE FROM WASTE AND BYPRODUCTS
    2.
    发明公开
    METHOD OF PRODUCING CALCIUM CARBONATE FROM WASTE AND BYPRODUCTS 有权
    VERFAHREN ZUR HERSTELLUNG VON CALCIUMCARBONAT AUS ABFALL UND NEBENPRODUKTEN

    公开(公告)号:EP2294233A2

    公开(公告)日:2011-03-16

    申请号:EP09754035.5

    申请日:2009-05-29

    IPC分类号: C22B7/04 C22B34/22 C01F11/18

    摘要: 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.

    摘要翻译: 本发明涉及一种生产碳酸钙的方法,包括以下步骤:使用由弱酸和弱碱形成的盐的水溶液作为第一提取溶剂萃取碱性工业废物或副产物,由此富钒 使第一残余物沉降并形成富含钙的第一滤液,过滤,由此将第一滤液与第一残余物分离,使用碳酸化气使富钙的第一滤液碳酸化,由此碳酸钙沉淀和第二滤液 并进行第二次过滤,由此将碳酸钙与第二滤液分离。 此外,本发明涉及从碱性工业废物或副产物中提取碳酸钙和钒的方法。