公开(公告)号：US5500082A

公开(公告)日：1996-03-19

申请号：US54179

申请日：1993-04-26

申请人： Hou-Min Chang ,  Tien-Wang Wu ,  John A. Heitmann

发明人： Hou-Min Chang ,  Tien-Wang Wu ,  John A. Heitmann

IPC分类号： D21C5/02

CPC分类号： D21C5/025 ,  D21C5/027 ,  Y02W30/648

摘要： Disclosed is a method of removing ink from xerographically printed paper. The method comprises pulping said printed paper in an aqueous slurry at a non-acidic pH to a consistency of about 8% or less. Next, added to the pulp slurry is a sufficient amount of long chain alcohol, the long chain alcohol having a melting point above room temperature, for a time sufficient with heating at a temperature sufficient, whereby an agglomeration of long chain alcohol and ink particles is formed. Next, the heating is stopped whereby the agglomeration solidifies into particles that settle to the bottom of the pulp slurry. Then, the agglomeration of solidified particles is removed from the pulp slurry thereby leaving a remaining slurry of deinked paper fiber and water. Optionally, the remaining slurry is subjected to flotation to remove substantially any remaining minute ink left particles behind after the agglomeration.

摘要翻译： 公开了从静电印刷纸上去除油墨的方法。 该方法包括将所述印刷纸在非酸性pH下的含水浆料中制浆至约8％或更低的稠度。 接下来，向纸浆中加入足量的长链醇，长链醇的熔点高于室温，时间足以在足够的温度下加热，由此长链醇和油墨颗粒的聚集是 形成。 接下来，停止加热，由此附聚固化成沉降到纸浆浆料底部的颗粒。 然后，从纸浆中除去固化颗粒的附聚物，从而留下脱墨纸纤维和水的剩余浆液。 任选地，将剩余的浆料进行浮选以在凝聚后基本上除去任何残留的微量墨留下的颗粒。