发明名称 |
WASTEPAPER DEINKING PROCESS |
摘要 |
<p>The invention relates to a process for the deinking of wastepaper stocks comprising converting the wastepaper to a pulp and contacting said pulp with an aqueous medium having a pH of about 7 or less containing a surface active deinking agent, and thereafter subjecting the resulting pulp-containing medium to one or more wash and/or flotation steps which is carried out at a pH of about 7 or less to remove suspended ink therefrom and to condition said pulp-containing medium for subsequent addition to a paper machine.</p> |
申请公布号 |
KR100251077(B1) |
申请公布日期 |
2000.04.15 |
申请号 |
KR19947002974 |
申请日期 |
1994.08.25 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
BORCHARDT, JOHN K. |
分类号 |
D21C5/02;(IPC1-7):D21C5/02;C09D9/04 |
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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