首页 | 官方网站   微博 | 高级检索  
     

撞击流反应制取“超细”白炭黑
引用本文:伍沅,陈煜.撞击流反应制取“超细”白炭黑[J].化工学报,2003,54(10):1381-1386.
作者姓名:伍沅  陈煜
作者单位:武汉化工学院化工系,湖北 武汉 430073;浙江工业大学教务处,浙江 杭州 310014
基金项目:国家自然科学基金 (No 2 92 762 60 ,2 0 1760 43 ),中国科学院过程工程研究所多相反应开放研究实验室资助项目~~
摘    要:用反应-沉淀法制取超细固体产物最重要的条件之一是高且均匀的过饱和度环境.在有关撞击流性质研究的基础上,研发了浸没循环撞击流反应器(SCISR).它具有全混流-无混合流串联循环的特殊流动结构和撞击区微观混合强烈的特点.后者可以创造高且均匀的过饱和度,产生大量晶核;低过饱和度的无混合区有利于微晶表面稳定和钝化.利用该反应器进行普通沉淀法制取“超细”白炭黑的实验研究,确定了最优操作条件,并与传统的搅拌槽反应器(STR)进行了比较.SCISR可以半间歇或连续操作.制得产品粒径范围0.5~2.0μm,平均粒径1.1~1.6μm,比STR产品细、粒径分布窄.反应产物干燥实验结果表明后处理过程中粒径稳定,不发生微细颗粒并聚.

关 键 词:撞击流  反应器  超细粉体  白炭黑  沉淀法
文章编号:0438-1157(2003)10-1381-06
收稿时间:2002-5-13
修稿时间:2002年5月13日

PREPARATION OF "ULTRA-FINE"WHITE CARBON BLACK IN SUBMERGED CIRCULATIVE IMPINGING STREAM REACTOR
WU Yuan,CHEN Yu.PREPARATION OF "ULTRA-FINE"WHITE CARBON BLACK IN SUBMERGED CIRCULATIVE IMPINGING STREAM REACTOR[J].Journal of Chemical Industry and Engineering(China),2003,54(10):1381-1386.
Authors:WU Yuan  CHEN Yu
Abstract:One of the most important conditions for preparation of “ultra fine” solid particles by precipitation is high and uniform supersaturation. Based on investigations into impinging streams, a submerged circulative impinging stream reactor (SCISR) has been developed, which has the special flow configuration of circulating perfect mixing flow-non-mixing flow in series and promotes micromixing strongly in the impingement zone. The impingement zone can create high and uniform supersaturation environment for precipitation to yield nuclei in a huge amount, while the non mixing regions with much lower supersaturation favor deactivation of micro-crystal surfaces. The preparation of “ultra fine” white carbon black by the common precipitation process is studied experimentally with SCISR, and the optimal operating conditions are obtained. The SCISR can be operated both in batch and continuously for the mentioned process. An investigation is also made for comparison between performances of SCISR and stirred tank reactor (STR) in the preparation of white carbon black, both operated in batch. The products of SCISR have the sizes ranged from 0.5 μm to 2.0 μm with the averages of 1.1—1.6 μm, which are finer with narrower size distribution than those from STR. The results of the experiments on spray drying of the reacted materials show that the products from SCISR are stable in size, suggesting no agglomeration of micro particles during the treatment after reaction.
Keywords:impinging streams  reactor  ultra fine powder  white carbon black  precipitation
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《化工学报》浏览原始摘要信息
点击此处可从《化工学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号