公开(公告)号：US4216054A

公开(公告)日：1980-08-05

申请号：US836449

申请日：1977-09-26

申请人： Jozef M. Bentvelzen ,  Steven L. Bogart ,  Maharaj K. Gupta ,  William T. McKean ,  Michael D. Meredith ,  Louis O. Torregrossa

发明人： Jozef M. Bentvelzen ,  Steven L. Bogart ,  Maharaj K. Gupta ,  William T. McKean ,  Michael D. Meredith ,  Louis O. Torregrossa

IPC分类号： D21C9/10

CPC分类号： D21C9/1073

摘要： A slurry of cellulosic fiber and water having a consistency in the range of 0.017-4.9% of the total ungassed weight of fiber and water is bleached with ozone. This is done without the usual addition of organic additives. The water can include impurities created by the bleaching process. Rapid reaction times under 8 minutes and preferably under 5 minutes are achieved.The reaction is enhanced in the consistency range of about 0.017-0.7%.The slurry is mixed using a mixing energy of 0.002-1.0 horsepower per cubic foot of gassed slurry. The mixing energy will determine whether the gas-liquid or liquid-solid interface will limit the speed of the reactions. The passage of ozone from the gas to a liquid phase will be the limiting factor below about 0.2 horsepower per cubic foot of gassed slurry. The increasing presence of ozone in the liquid as the horsepower increases from about 0.2 to about 0.4 horsepower per cubic foot of gassed slurry indicates this is a zone in which both the gas-liquid and the liquid-solid interface are limiting factors. Above about 0.4 horsepower per cubic foot of gassed slurry the liquid-solid interface will be the limiting factor.Superficial velocity of the ozone bearing gas is in a range of 200-3800 feet per hour. The ozone usually is 0.05-6% by weight of the total weight of the gas.

摘要翻译： 将纤维素纤维和水的浆液在纤维和水的总未脱气重量的0.017-4.9％的范围内与臭氧一起漂白。 没有通常添加有机添加剂就可以完成。 水可以包括由漂白过程产生的杂质。 8分钟以下，优选5分钟以下快速反应时间。 该反应在约0.017-0.7％的一致性范围内得到增强。 使用0.002-1.0马力/立方英尺充气浆料的混合能量将浆料混合。 混合能量将决定气液或液 - 固界面是否会限制反应的速度。 臭氧从气体通到液相将是每立方英尺充气浆料低于约0.2马力的限制因素。 臭氧在液体中的增加的存在随着马力从每立方英尺充气浆料的约0.2至约0.4马力的增加表明这是气液和液 - 固界面都是限制因素的区域。 高于约0.4马力/立方英尺的充气浆液液固界面将成为限制因素。 含臭氧气体的表观速度在每小时200-3800英尺的范围内。 臭氧通常为气体总重量的0.05-6重量％。