发明名称 |
Method of preparing insoluble hydrolysable tannin and method of treating waste liquid with the tannin |
摘要 |
An insoluble hydrolysable tannin is prepared by dissolving a hydrolysable tannin powder in aqueous ammonia; mixing the resulting solution with an aldehyde aqueous solution to form a precipitate; heating the precipitate; mixing the heated precipitate with a mineral acid; and filtering the resulting mixture to leave a residue on a filter. The inventive insoluble tannin exhibits high adsorption properties for heavy metal elements and is insoluble in either water, acid, or alkali. Methods for treating waste liquids and recovering heavy metal elements therefrom using the inventive insoluble tannin are disclosed.
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申请公布号 |
US5296629(A) |
申请公布日期 |
1994.03.22 |
申请号 |
US19930007614 |
申请日期 |
1993.01.22 |
申请人 |
MITSUBISHI NUCLEAR FUEL COMPANY, LTD. |
发明人 |
SHIRATO, WATARU;KAMEI, YOSHINOBU |
分类号 |
C07H13/02;B01D15/00;B01J20/24;C02F1/28;C02F101/20;C08H99/00;G21C19/46;G21F9/08;G21F9/12;(IPC1-7):C07C69/88 |
主分类号 |
C07H13/02 |
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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