A descriptive model for the homogeneous precipitation of zinc sulfide from acidic zinc salt solutions

被引:18
作者
Eshuis, A [1 ]
van Elderen, GRA [1 ]
Koning, CAJ [1 ]
机构
[1] Eindhoven Univ Technol, Lab Chem Proc Engn, NL-5600 MB Eindhoven, Netherlands
关键词
precipitation; homogeneous; mechanism; coagulation; morphology;
D O I
10.1016/S0927-7757(98)00835-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Homogeneous precipitation of zinc sulfide (ZnS) is investigated by observing the induction time, particle size and particle morphology as a function of four parameters, e.g. pH, anion type. continuous phase viscosity and stirring rate. Based on these observations a descriptive model of the precipitation mechanism is presented. According to this model the homogeneous precipitation of ZnS proceeds in four stages. Initially nuclei are formed homogeneously throughout the solution. They are not stable and by a variety of coagulation processes the final particles are formed. Particle size and particle morphology are strongly influenced by the transition times between the four stages. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:505 / 512
页数:8
相关论文
共 13 条