铝离子对二水硫酸钙晶体结晶性能的影响

孙祥斌 窦焰 方羊 郑之银 刘荣 崔鹏

doi:10.12034/j.issn.1009-606X.216281

过程工程学报 >

2017 , Vol. 17 >Issue 3: 613 - 618

DOI: https://doi.org/10.12034/j.issn.1009-606X.216281

过程与工艺

铝离子对二水硫酸钙晶体结晶性能的影响

孙祥斌窦焰方羊郑之银刘荣崔鹏

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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

网络出版日期: 2017-06-14

基金资助

安徽省创新环境建设专项项目资助

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Effect of Aluminium Ion on Crystallization Performance of Calcium Sulfate Dihydrate

Xiangbin SUN Yan DOU Yang FANG Zhiyin ZHENG Rong LIU Peng CUI

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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 date: 2016-09-06

Revised date: 2016-12-03

Online published: 2017-06-14

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摘要

以CaHPO₄·2H₂O和H₂SO₄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⁺对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

本文引用格式

孙祥斌窦焰方羊郑之银刘荣崔鹏 . 铝离子对二水硫酸钙晶体结晶性能的影响[J]. 过程工程学报, 2017 , 17(3) : 613 -618 . DOI: 10.12034/j.issn.1009-606X.216281

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 80℃ and 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

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