Influence of Al3+, Na+ and Mg2+ on crystallization of calcium sulfate dihydrate

doi:10.11949/j.issn.0438-1157.20151808

Abstract

Abstract:

The system, including CaHPO₄·2H₂O-H₂SO₄-H₃PO₄-H₂O, is utilized to simulate wet process for phosphoric acid production. Based upon the slurry composition of phosphate mineral analysis, according to single factor experimental demands, the influence of Al³⁺, Na⁺and Mg²⁺ on crystallization and washing rate of CaSO₄·2H₂O were investigated. The result indicated that, it is beneficial for the size of CaSO₄·2H₂O crystals when adding Al³⁺into the system. Na⁺as the form of 0.9% (mass) Na₂O in the slurry also caused agglomeration of CaSO₄·2H₂O crystals. We also found that it is helpful for the washing rate. But when Mg²⁺ was added into the system, the unfavorable impact such as increasing the viscosity of solution, seriously influencing crystal growth and washing rate. For our target production, CaSO₄·2H₂O crystal, XRD, SEM were adopted to characterize the products during the process. The results showed that crystal growth conforms to Burton-Cabrera-Frank model. The impurity ions change the reaction rate and crystal plane growth rate.

Key words: reaction, crystallization, ions, preparation, calcium sulfate dihydrate

摘要：

采用CaHPO₄·2H₂O-H₂SO₄-H₃PO₄-H₂O体系模拟湿法磷酸生产过程，以磷矿浆成分为依据，在单因素条件下分别研究Al³⁺、Na⁺和Mg²⁺对结晶和CaSO₄·2H₂O水洗速率的影响。研究发现：添加Al³⁺有利于CaSO₄·2H₂O晶体粒径增加；添加Na⁺使得0.9% Na₂O含量的Na⁺引起CaSO₄·2H₂O晶体团聚，有利于水洗；Mg²⁺增加溶液黏度，严重影响晶体生长和水洗速率。通过X射线衍射、扫描电子显微镜对CaSO₄·2H₂O进行表征，发现其晶体生长符合非完整光滑突变界面模型，杂质离子影响反应速率和晶面生长速度。

关键词: 反应, 结晶, 离子, 制备, 二水硫酸钙

CLC Number:

TQ177.372

LIU Tonghai, DOU Yan, FANG Yang, CUI Peng, SHEN Hao, ZHENG Zhiyin, LIU Rong. Influence of Al³⁺, Na⁺ and Mg²⁺ on crystallization of calcium sulfate dihydrate[J]. CIESC Journal, 2016, 67(S1): 296-301.

刘同海, 窦焰, 方羊, 崔鹏, 沈浩, 郑之银, 刘荣. Al³⁺、Na⁺和Mg²⁺对二水硫酸钙结晶的影响[J]. 化工学报, 2016, 67(S1): 296-301.

References 19

[1]	贡长生.现代磷化工技术和应用[M].北京:化学工业出版社,2013:336-354. GONG C S. Modern Phosphorus Chemical Technology and Its Application[M].Beijing:Chemical Industry Press, 2013:336-354.
[2]	马超, 吴元欣, 金放, 等. 磷酸的工业生产研究现状与展望[J]. 化学工程, 2013, 41(6):74-78. DOI:10.3969/j.issn.1005-9954.2013.06.01 MA C,WU Y X,JIN F, et al. Current status and prospect of industrial phosphoric acid production[J]. Chemical Engineering, 2013, 41(6):74-78. DOI:10.3969/j.issn.1005-9954.2013.06.01
[3]	吴佩芝. 湿法磷酸[M]. 北京:化学工业出版社,1987. WU P Z. Wet Process Phosphoric Acid[M].Beijing:Chemical Industry Press, 1987.
[4]	李军, 王建华,钟本和, 等. Al3+对二水硫酸钙结晶动力学影响的研究[J]. 成都科技大学学报, 1996,90(2):53-59. DOI:10.15961/j.jsuese.1996.02.008 LI J, WANG J H, ZHONG B H, et al. The effects aluminum on the crystallization of gypsum from phosphoric acid solution[J]. Journal of Chengdu University of Science and Technology, 1996,90(2):53-59. DOI:10.15961/j.jsuese.1996.02.008
[5]	HASSON D, ADDAI-MENSAH J, METCALFE J. Filterability of gypsum crystallized in phosphoric acid solution in the presence of ionic impurities[J]. Ind. Eng. Chem. Res., 1990, 29(5):867-875.
[6]	LI J, WANG J H, ZHANG Y X. Effects of the impurities on the habit of gypsum in wet-process phosphoric acid[J]. Industrial & Engineering Chemistry Research, 1997, 36(7):2657-2661.
[7]	RASHAD M M, MAHMOUD M H H, IBRAHIM I A, et al. Crystallization of calcium sulfate dihydrate under simulated conditions of phosphoric acid production in the presence of aluminum and magnesium ions[J]. Journal of Crystal Growth, 2004, 267(1):372-379.
[8]	李军, 王建华,张允湘. 氟, 铝, 硅杂质对石膏结晶过程的影响[J]. 高校化学工程学报, 1997, 11(2):156-162. LI J,WANG J H, ZHANG Y X. Effect of fluorine,aluminium and silicon on the crystallization of gypsum[J]. Journal of Chemical Engineering of Chinese University, 1997, 11(2):156-162.
[9]	李军, 王国平, 钟本和. Fe3+、Al3+、Mg2+ 对石膏结晶习性影响的研究[J]. 化学工业与工程, 1997,14(2):19-21. LI J,WANG G P, ZHONG B H. The effects of Fe3+, Al3+ and Mg2+ on the crystal habits of gypsum[J]. Chemical Industry and Engineering, 1997,14(2):19-21.
[10]	崔益顺. 添加盐类对硫酸分解磷矿的影响[J]. 化工矿物与加工, 2007, 36(1):1-2. CUI Y S. Effect of adding K+、Na+、Cu2+、Zn2+ in phosphate rock on phosphate rock decomposition[J]. Industrial Minerals and Processing, 2007, 36(1):1-2.
[11]	KRUGER A, FOCKE W W, KWELA Z, et al. Effect of ionic impurities on the crystallization of gypsum in wet-process phosphoric acid[J]. Industrial & Engineering Chemistry Research, 2001, 40(5):1364-1369.
[12]	HAMDONA S K, HADAD U A A. Crystallization of calcium sulfate dihydrate in the presence of some metal ions[J]. Journal of Crystal Growth, 2007, 299(1):146-151.
[13]	FELDMANN T, DEMOPOULOS G P. Influence of impurities on crystallization kinetics of calcium sulfate dihydrate and hemihydrate in strong HCl-CaCl2 solutions[J]. Industrial & Engineering Chemistry Research, 2013, 52(19):6540-6549.
[14]	DU H, CHEN A, YANG L. Research on dihydrate calcium sulphate crystallization during the production of phosphoric acid by wet process[J]. Journal of Materials Science and Chemical Engineering, 2014, 2(12):7.
[15]	SPEIGHT J G. Lange's Handbook of Chemistry[M]. New York:McGraw-Hill, 2005.
[16]	杨晨, 宋兴福, 李树民,等. FBRM在线研究三水碳酸镁在电解质溶液中的二次过程[J]. 高校化学工程学报, 2013, (4):701-707. DOI:10.3969/j.issn.1003-9015.2013.04. 025 YANG C, SONG X F, LI S M, et al. On-line FBRM investigation of secondary processes of nesquehonite in the electrolyte solutions[J]. Journal of Chemical Engineering of Chinese Universities, 2013, (4):701-707. DOI:10.3969/j.issn.1003-9015.2013.04.025
[17]	CATE W E, DEMING M E. Effect of impurities on density and viscosity of simulated wet-process phosphoric acid[J]. J.Chem.Eng.Data, 1970, 15(2):290-295.
[18]	潘兆橹.结晶学及矿物学(下册)[M]. 北京:地质出版社,1985 PANG Z L. Crystallography and Mineralogy(Volume Two)[M]. Beijing:Geological Publishing House,1985
[19]	姚连增.晶体生长基础[M]. 合肥:中国科学技术大学出版社, 1995. YAO L Z. Crystal Growth Foundation[M]. Hefei:University of Science & Technology China Press, 1995.

Influence of Al³⁺, Na⁺ and Mg²⁺ on crystallization of calcium sulfate dihydrate

Al³⁺、Na⁺和Mg²⁺对二水硫酸钙结晶的影响

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References 19

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Cheng CHENG, Zhongdi DUAN, Haoran SUN, Haitao HU, Hongxiang XUE. Lattice Boltzmann simulation of surface microstructure effect on crystallization fouling [J]. CIESC Journal, 2023, 74(S1): 74-86.
[2]	Runmiao GAO, Mengjie SONG, Enyuan GAO, Long ZHANG, Xuan ZHANG, Keke SHAO, Zekang ZHEN, Zhengyong JIANG. Review on greenhouse gas reduction related to refrigerants in cold chain [J]. CIESC Journal, 2023, 74(S1): 1-7.
[3]	Hongxin YU, Shuangquan SHAO. Simulation analysis of water crystallization process [J]. CIESC Journal, 2023, 74(S1): 250-258.
[4]	Jie CHEN, Yongsheng LIN, Kai XIAO, Chen YANG, Ting QIU. Study on catalytic synthesis of sec-butanol by tunable choline-based basic ionic liquids [J]. CIESC Journal, 2023, 74(9): 3716-3730.
[5]	Minghao SONG, Fei ZHAO, Shuqing LIU, Guoxuan LI, Sheng YANG, Zhigang LEI. Multi-scale simulation and study of volatile phenols removal from simulated oil by ionic liquids [J]. CIESC Journal, 2023, 74(9): 3654-3664.
[6]	Yu FU, Xingchong LIU, Hanyu WANG, Haimin LI, Yafei NI, Wenjing ZOU, Yue LEI, Yongshan PENG. Research on F₃EACl modification layer for improving performance of perovskite solar cells [J]. CIESC Journal, 2023, 74(8): 3554-3563.
[7]	Guoze CHEN, Dong WEI, Qian GUO, Zhiping XIANG. Optimal power point optimization method for aluminum-air batteries under load tracking condition [J]. CIESC Journal, 2023, 74(8): 3533-3542.
[8]	Linzheng WANG, Yubing LU, Ruizhi ZHANG, Yonghao LUO. Analysis on thermal oxidation characteristics of VOCs based on molecular dynamics simulation [J]. CIESC Journal, 2023, 74(8): 3242-3255.
[9]	Mengmeng ZHANG, Dong YAN, Yongfeng SHEN, Wencui LI. Effect of electrolyte types on the storage behaviors of anions and cations for dual-ion batteries [J]. CIESC Journal, 2023, 74(7): 3116-3126.
[10]	Ji CHEN, Ze HONG, Zhao LEI, Qiang LING, Zhigang ZHAO, Chenhui PENG, Ping CUI. Study on coke dissolution loss reaction and its mechanism based on molecular dynamics simulations [J]. CIESC Journal, 2023, 74(7): 2935-2946.
[11]	Wentao WU, Liangyong CHU, Lingjie ZHANG, Weimin TAN, Liming SHEN, Ningzhong BAO. High-efficient preparation of cardanol-based self-healing microcapsules [J]. CIESC Journal, 2023, 74(7): 3103-3115.
[12]	Zhilong WANG, Ye YANG, Zhenzhen ZHAO, Tao TIAN, Tong ZHAO, Yahui CUI. Influence of mixing time and sequence on the dispersion properties of the cathode slurry of lithium-ion battery [J]. CIESC Journal, 2023, 74(7): 3127-3138.
[13]	Xiaokun HE, Rui LIU, Yuan XUE, Ran ZUO. Review of gas phase and surface reactions in AlN MOCVD [J]. CIESC Journal, 2023, 74(7): 2800-2813.
[14]	Tan ZHANG, Guang LIU, Jinping LI, Yuhan SUN. Performance regulation strategies of Ru-based nitrogen reduction electrocatalysts [J]. CIESC Journal, 2023, 74(6): 2264-2280.
[15]	Xiaowen ZHOU, Jie DU, Zhanguo ZHANG, Guangwen XU. Study on the methane-pulsing reduction characteristics of Fe₂O₃-Al₂O₃ oxygen carrier [J]. CIESC Journal, 2023, 74(6): 2611-2623.