发明名称 |
WERKWIJZE VOOR HET KLAREN VAN AFVALWATER AFKOMSTIG VAN HET ONTINKTEN VAN BEDRUKT PAPIER. |
摘要 |
<p>Industrial effluents containing suspended solids, e.g. paper fibres, and a surface-active agent are flocculated by treating to change the pH by two units in one direction followed by a change of two units in the opposite direction. Flocculation agents may also be added. The flocs may be separated by bubbling gases through the treated effluents.ALSO:Waste paper is treated with detergents (surface active agents) and pulped to separate the ink from the fibres. After dilution, washing, thickening and acidification the pulp is turned into a web. The effluent containing the ink is treated to change the pH by two in one direction followed by a change of pH of two in the opposite direction and thus flocculate the solids. The purified water is returned to the deinking stage.</p> |
申请公布号 |
NL145200(B) |
申请公布日期 |
1975.03.17 |
申请号 |
NL19640015178 |
申请日期 |
1964.12.29 |
申请人 |
THE HOLLIFIELD CORPORATION, JERSEY CITY, NEW JERSEY, VER. ST. V. AM. |
发明人 |
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分类号 |
C02F1/52;C02F1/54;C02F1/66;C02F9/00;D21C5/02;(IPC1-7):02C5/02 |
主分类号 |
C02F1/52 |
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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