摘要
氯化钾溶解过程中产生凝胶现象的主要原因有:一是氯化钾原料中夹带的浮选剂十八胺溶解于溶液中,当其浓度达到或超过临界胶束浓度时,形成十八胺胶团,胶团吸附于氯化钾表面象搭桥一样联接起来形成氯化钾溶液凝胶;二是胶团表面的疏水部分相互聚结,甚至一胶团表面的自由基链有可能"渗透"到另一胶团内核,从而使胶团之间通过疏水自由基链联接起来。试验结果表明,温度升高,离子浓度增加,氯化钾胶凝作用增强。
There are two main reasons for the gelation during the process of dissolution of potassium chloride:firstly,the flotation reagent octadecylamine contained in the raw material potassium chloride is dissolved in the solution.When the concentration of octadecylamine in the solution reaches or exceeds the critical micelle concentration,the octadecylamine is formed in the solution.The micelles can be adsorbed on the surface of potassium chloride,so that each micelles can be connected like a bridge to form potassium chloride solution gel.Secondly,hydrophobic parts on the surface of micelles coalesce with each other,and even free radical chains on the surface of one micelle may permeate into the core of another micelle,so that the two micelles are connected by hydrophobic free radical chains.The results show that the gelation of potassium chloride increases with the increase of temperature and ion concentration.
引文
[1]张罡.我国硝酸钾生产工艺及装置概述[J].化肥工业,2011,38(2):7-12.
[2]张罡.5万吨农用硝酸钾装置试车概况[J].化肥设计,2015(5):37-40.
[3]张建民.氯化钾生产工艺研究进展[J].广州化工,2010,38(10):55-56.
[4]陈向明,石运伟,赵先恩,等.脂肪胺的高效液相色谱分离及质谱鉴定[J].色谱,2005,23(6):642-645.
[5]刘素娟,孙学军,朱芳,等.柱前衍生化HPLC荧光法测定脂肪胺化合物[J].曲阜师范大学学报(自然科学版),2007,33(4):77-80.
[6]陈进生,王杭州,钟爱民.十八胺应用中的若干技术问题探讨[J].热力发电,2003(5):61-62.
[7]朱瑶,赵振国,界面化学基础[M],北京:化学工业出版社,1996.
[8]赵静,赵仲鹤,边红利,等.盐酸十八胺在氯化钾浮选中的胶体化学研究[J].山西大学学报(自然科学版),2012,35(3):540-545.
[9]Hancer M.,Celik M.S.,Miller J.D.The significance of interfacial water structure in soluble salt flotation systems[J].Journal of Colloid and Interface Science,2001,235(1):150-161.
[10]Fuerstenau D.W.,Fuerstenau M.C.Ionic size in flotation collection of alkali halides Transaction of the American Institute of Mining[J].Metallurgical and Petroleum Engineers,1956,205:302-306.
[11]曹沁波.可溶性钾盐正浮选的浮选化学研究[D].太原:山西大学,2011.
[12]赵国玺,肖进新.正、负离子表面活性剂混合体系的相行为---浊点现象[J].日用化学工业,1997(2):1-3.
[13]罗英武,翁志学,黄志明,等.自由基交联共聚合体系凝胶点和凝胶形成机理[J].高等学校化学学报,1997(6):968-972.