常压无氯盐溶液制备α-CaSO4·0.5H2O晶体研究

人工晶体学报 ›› 2024, Vol. 53 ›› Issue (5): 855-863.

常压无氯盐溶液制备α-CaSO₄·0.5H₂O晶体研究

李雪礼, 郭静静, 霍腾飞, 白佳乐, 张琰图

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

收稿日期:2023-12-26 出版日期:2024-05-15 发布日期:2024-05-21
作者简介:李雪礼(1980—),男,河南省人,博士,副教授。E-mail:lzlixueli@163.com
基金资助:
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)

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

LI Xueli, GUO Jingjing, HUO Tengfei, BAI Jiale, ZHANG Yantu

Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000, China

Received:2023-12-26 Online:2024-05-15 Published:2024-05-21

摘要/Abstract

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。

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

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 that α-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.

Key words: atmospheric pressure, chlorine-free salt, sodium sulfate, α-calcium sulfate hemihydrate, homogeneous morphology, high value utilization

中图分类号:

O784

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

LI Xueli, GUO Jingjing, HUO Tengfei, BAI Jiale, ZHANG Yantu. Preparation of α-CaSO₄·0.5H₂O Crystals from Chlorine-Free Salt Solution at Atmospheric Pressure[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(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

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