| 摘要 |
The invention therefore relates to a process for the deinking of wastepaper stocks which comprises: a) converting the wastepaper to a pulp and contacting said pulp with an aqueous medium of alkaline pH containing a surface active deinking agent, and b) subjecting the resulting pulp-containing medium to one or more flotation steps wherein said final flotation step is carried out at a pH of less than about 7 to remove suspended ink therefrom and to condition said pulp-containing medium for subsequent addition to a paper machine.
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