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过程工程学报 ›› 2017, Vol. 17 ›› Issue (3): 613-618.DOI: 10.12034/j.issn.1009-606X.216281

• 过程与工艺 • 上一篇    下一篇

铝离子对二水硫酸钙晶体结晶性能的影响

孙祥斌1,窦焰1,方羊1,郑之银2,刘荣2,崔鹏1   

  1. 1. 合肥工业大学化学与化工学院,安徽 合肥 230009;2. 安徽六国化工股份有限公司,安徽 铜陵 244000
  • 收稿日期:2016-09-06 修回日期:2016-12-03 出版日期:2017-06-20 发布日期:2017-06-14
  • 通讯作者: 崔鹏 cuipeng@hfut.edu.cn
  • 基金资助:
    安徽省创新环境建设专项项目资助

Effect of Aluminium Ion on Crystallization Performance of Calcium Sulfate Dihydrate

Xiangbin SUN1,  Yan DOU1,  Yang FANG1,  Zhiyin ZHENG2,  Rong LIU2,  Peng CUI1*   

  1. 1. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;
    2. Anhui Liuguo Chemical Co., Ltd., Tongling, Anhui 244000, China
  • Received:2016-09-06 Revised:2016-12-03 Online:2017-06-20 Published:2017-06-14

摘要:

CaHPO4·2H2OH2SO4为原料,AlCl3·6H2O为添加剂,在温度80搅拌速率150 r/min、反应时间4 h的条件下制备CaSO4·2H2O晶体,研究了Al3+CaSO4·2H2O晶体结晶性能的影响. 结果表明,Al3+浓度增加,CaSO4·2H2O晶体宽度提高,长宽比下降. XRD结果表明,衍射峰发生偏移,对应晶面的晶面间距减小;晶面间距减小可能与Al3+掺入CaSO4·2H2O晶格间隙中有关,Al3+抑制了晶体沿长度方向生长,降低了CaSO4·2H2O的长宽比.

关键词:  铝离子, 二水硫酸钙, 结晶, 抑制剂

Abstract:

Calcium sulfate dihydrate were prepared by using calcium hydrogen phosphate dihydrate and sulfuric acid as raw materials and aluminum chloride hexahydrate as additive at 80and 150 r/min for 4 h, the effect of aluminum ion on crystallization performance of calcium sulfate dihydrate was studied.. The results showed that the calcium sulfate dihydrate increased in width and decreased in aspect ratio when the concentration of aluminum ion was increased. The diffraction peaks were shifted, and the interplanar spacing of the corresponding crystal faces decreased. The decrease of interplanar spacing may be related to the doping of Al3+ into the lattice of calcium sulfate dihydrate. The addition of Al3+ inhibited the growth of crystals along the length and decreased the aspect ratio of calcium sulfate dihydrate.

Key words: aluminium ion, calcium sulphate dihydrate, crystallization, inhibitors