发明名称 |
VERFAHREN ZUM DEINKEN VON BÜRO-ALTPAPIER |
摘要 |
<p>This invention related to a process for the deinking of office wastepaper stocks which comprises: a) converting the wastepaper to a pulp, b) contacting the pulp with an aqueous medium of alkaline pH containing between 0.05 and 2 percent by weight, calculated on a dry weight basis of the pulp, of a deinking agent comprising a first component comprising at least one ethylene oxide adduct of a detergent-range alcohol having in the range of from 8 to 20 carbon atoms and an average of from 3 to 20 oxyethylene units per molecule of alcohol, a second component selected from the group consisting of one or more detergent-range olefins having from 8 to 22 carbon atoms, one or more saturated hydrocarbons having from 8 to 20 carbon atoms, and mixtures thereof and optionally a third component comprising a detergent-range alcohol having from 8 to 20 carbon atoms, and c) treating the resulting pulp-containing medium by washing or flotation to remove suspended ink therefrom.</p> |
申请公布号 |
DE69608913(T2) |
申请公布日期 |
2000.11.02 |
申请号 |
DE1996608913T |
申请日期 |
1996.10.09 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V., DEN HAAG/S'GRAVENHAGE |
发明人 |
BORCHARDT, KEITH;BLANCO, JAVIER |
分类号 |
D21C5/02;(IPC1-7):D21C5/02 |
主分类号 |
D21C5/02 |
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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