撞击流-旋转填料床合成超细平台燃烧催化剂β-Cu  

Synthesis of ultrafine β-Cu in impinging stream-rotating packed bed

作　　者：康荣灿[1] 刘有智[1] 郭雨[1] 石国亮[1] 李鹏[1] 

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051

出　　处：《化工科技》2006年第4期1-5,共5页Science & Technology in Chemical Industry

基　　金：国家自然科学基金资助项目(20576128);山西省自然科学基金资助项目(20051015)

摘　　要：平台燃烧催化刺2，4．二羟基苯甲酸铜粉体的超细化是基于微观混合对沉淀反应影响原理的分析以及撞击流-旋转填料床的微观混合机理提出的。通过对撞击流．旋转填科床的微观混合时间理论计算表明，撞击流＋旋转填料床的微观混合时间为0．04～5ms,可以满足合成反应（特征时间3．8s）对反应器的要求。利用IS-RPB反应器合成了体积平均粒径610nm的超细2，4＋二羟基苯甲酸铜，且粒度分布范围窄。Based on summarizing of impinging stream technology and high gravity technology, the action mechanism of micromixing effect on precipitation was analyzed and the cause of IS-RPB reactor in enhancing micromixing effect on precipitation was discussed. Supersaturation and its distribution were the main factors in determining the particles size and distribution （PSI））. And characteristic diffusion time was adhibited to judge the controlling factor of the nucleation process. The results indicated that compared to characteristic nucleation time of 3.8 s, characteristic diffusion time of 0.04-5 ms satisfies to the condition of micromixing. Controlling operation conditions, spindleβ-Cu partides with size range from 0.12μm to 5μm can be obtained. The average particle size of the product is 610nm and specific surface area is 11. 626 5m^2/g.

关 键 词：撞击流-旋转填科床 超细粉体 微观混合 燃烧催化荆 

分 类 号：TQ261.2[化学工程—有机化工]