EFFECTS OF PULP CONSISTENCY AND MIXING INTENSITY ON OZONE BLEACHING

被引：0

作者：

HURST, MM

机构：

来源：

TAPPI JOURNAL | 1993年 / 76卷 / 04期

关键词：

CONSISTENCY; HARDWOOD PULPS; MEDIUM CONSISTENCY; MIXING; OZONE BLEACHING; REACTION TIME; SOFTWOOD PULPS; VISCOSITY;

D O I：

暂无

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Conventional wisdom holds that ozone bleaching is feasible only at low or high pulp consistencies. However, recent research suggests that ozone bleaching at medium consistency is possible under conditions of high-intensity mixing. This article presents experimental results for softwood and hardwood pulps that were ozone-bleached over a range of consistencies (3-40%) and mixing conditions. Ozone was pressurized and delivered by a proprietary automated system. Results indicate that ozone bleaching at medium consistency can be as effective as bleaching at high consistency. Medium-consistency bleaching has the advantage of greater selectivity resulting in higher pulp viscosity.

引用

页码：156 / 161

页数：6