| 摘要 |
<p>PURPOSE:To remarkably decrease the residual ink on deinked reclaimed pulp and to obtain reclaimed waste paper having high whiteness and suitable for medium-grade or fine paper by adding a phase-transfer catalyst to a process for the treatment of waste paper, etc., with a deinking agent. CONSTITUTION:Waste paper is reclaimed by adding a phase-transfer catalyst (e.g. distearyldimethyl ammonium bromide) to a process for the treatment of waste paper or pulp with a deinking agent. The deinking agent preferably contains one or more substances selected from an alkali agent, a bleaching agent and a nonionic surfactant.</p> |
