人工晶体学报2024，Vol.53Issue(5) ：855-863.

常压无氯盐溶液制备α-CaSO4·0.5H2O晶体研究

Preparation of α-CaSO4·0.5H2O Crystals from Chlorine-Free Salt Solution at Atmospheric Pressure

李雪礼 郭静静 霍腾飞 白佳乐 张琰图
人工晶体学报2024，Vol.53Issue(5) ：855-863.
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常压无氯盐溶液制备α-CaSO4·0.5H2O晶体研究

Preparation of α-CaSO4·0.5H2O Crystals from Chlorine-Free Salt Solution at Atmospheric Pressure

李雪礼 1郭静静 1霍腾飞 1白佳乐 1张琰图1
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作者信息

  • 1. 延安大学化学与化工学院,陕西省化学反应工程重点实验室,延安 716000
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摘要

本文以Na2SO4溶液为反应介质,研究了反应温度、反应时间、液固比、pH值、Na2SO4质量分数对α-CaSO4·0.5H2O生成的影响.结果表明,在Na2SO4质量分数为12.5％,液固比为5:1,pH值为7,反应温度为97 ℃,反应时间为4 h的条件下,制备出平均长度46.0 μm、平均长径比17.23、形貌均一的α-CaSO4·0.5H2O晶体.常压无氯盐溶液方法克服了氯离子腐蚀工业设备、污染环境等缺点,为高值化利用磷石膏提供重要的技术支持.

Abstract

The effects of reaction temperature,reaction time,liquid-solid ratio,pH value and Na2SO4 mass fraction on the generation of α-CaSO4·0.5H2O were investigated using Na2SO4 solution as the reaction medium.The results show thatα-CaSO4·0.5H2O crystals with an average length of 46.0 µm,an average aspect ratio of 17.23 and a homogeneous morphology are prepared under the conditions of Na2SO4 mass fraction of 12.5％,liquid-solid ratio of 5∶1,pH value of 7,reaction temperature of 97 ℃ and reaction time of 4 h.The method of chloride-free salt solution under atmospheric pressure overcomes the drawbacks of chloride ion corrosion of industrial equipment and environmental pollution,providing important technical support for the high value utilization of phosphogypsum.

关键词

常压/无氯盐/硫酸钠/α-半水硫酸钙/形貌均一/高值化利用

Key words

atmospheric pressure/chlorine-free salt/sodium sulfate/α-calcium sulfate hemihydrate/homogeneous morphology/high value utilization

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基金项目

国家重点研发计划(2019YFC1905800)

陕西省自然科学基础研究计划(2023-JC-YB-117)

延安大学科研专项(2023JBZR-015)

陕西省大学生创新创业训练计划(S202310719098)

出版年

2024
人工晶体学报
中材人工晶体研究院

人工晶体学报

CSTPCD北大核心
影响因子：0.554
ISSN：1000-985X
参考文献量12
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