无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2011, Vol. 43 ›› Issue (2): 14-.

• 论文 • 上一篇    下一篇

改性层状结晶硅酸钠对钙镁离子交换的动力学研究

耿卫东1,杨雪静2,杨亚玲2   

  1. 1.昆明市生产力促进中心,云南昆明 650021;2.昆明理工大学
  • 发布日期:2011-04-19

Study on exchange kinetics of layered modified sodium silicate crystal to Ca2+/Mg2+

Geng Weidong1,Yang Xuejing2,Yang Yaling2   

  1. 1 .Kunming Productivity Promotion Center, Kunming 650021,China;2.Kunming University of Science and Technology
  • Published:2011-04-19

摘要: 改性层状结晶硅酸钠(Al-SKS-6)是一种通过层状结晶硅酸钠(SKS-6)改性的性能优良的洗衣粉助剂。对其进行合成并表征,考察了pH、温度和时间对钙镁交换能力的影响及动力学研究。当pH在10左右时,钙离子和镁离子交换能力达到最大,分别为352 mg/g和405 mg/g,可满足洗衣粉的实际要求。Al-SKS-6对钙镁离子的交换是一个快速交换过程,在5 min时,钙镁离子交换能力可达到30 min时的90%,10 min基本可以达到交换平衡,交换过程符合二级动力学方程,且随着温度的升高,Al-SKS-6对钙镁离子交换能力增大。

关键词: 改性层状结晶硅酸钠, 钙镁离子, 动力学

Abstract: Layered modified sodium silicate crystal (Al-SKS-6) is a kind of excellent detergent additive made from modifying layered sodium silicate crystal (SKS-6).Al-SKS-6 was synthesized and characterized.Effects of pH,tempe-rature,and time on Ca2+/Mg2+ exchange property of Al-SKS-6 were investigated and kinetics thereof was studied.Exchange properties of Ca2+ and Mg2+ reached 352 mg/g and 405 mg/g respectively,which could satisfy the practical requirement of detergent when pH was about 10. Process of Al-SKS-6 exchanging Ca2+/Mg2+ was quite rapid and the exchange property at 5 min was equal to 90% at 30 min.Furthermore,the exchange process could reach equilibrium in 10 min and accorded to the pseudo second order kinetics equation and the exchange property of Al-SKS-6 to Ca2+/Mg2+ increased with increasing temperature.

Key words: layered modified sodium silicate crystal, Ca2+/Mg2+, kinetics

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