无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2020, Vol. 52 ›› Issue (12): 55-58.doi: 10.11962/1006-4990.2020-0063

• 环境·健康·安全 • 上一篇    下一篇

磷石膏湿法偶联除杂规律初探

吴宝建1(),吕昕峰2,张清杰2,易美桂1(),向兰2()   

  1. 1.四川大学化学工程学院,四川成都 610065
    2.清华大学化学工程系
  • 收稿日期:2020-06-17 出版日期:2020-12-10 发布日期:2020-12-15
  • 通讯作者: 易美桂,向兰
  • 作者简介:吴宝建(1993— ),男,硕士研究生,研究方向为磷石膏分离提纯;E-mail:imwbj1@163.com
  • 基金资助:
    国家自然科学基金资助(21978153)

Primary exploration of removing impurities from phosphogypsum by wet coupling process

Wu Baojian1(),Lü Xinfeng2,Zhang Qingjie2,Yi Meigui1(),Xiang Lan2()   

  1. 1. School of Chemical Engineering,Sichuan University,Chengdu,610065,China
    2. Department of Chemical Engineering,Tsinghua University
  • Received:2020-06-17 Online:2020-12-10 Published:2020-12-15
  • Contact: Yi Meigui,Xiang Lan

摘要:

磷石膏资源丰富,但共存杂质多,应用受限。为此探讨了采用硅烷偶联剂对磷石膏进行湿法偶联除杂的工艺规律。结果表明:硅烷偶联剂可与磷石膏中的二氧化硅和羧基类有机杂质通过氢键及脱水缩合的方式结合,使相应杂质疏水悬浮并通过刮除分离除去,由此制得纯度为96.2%(以CaSO4·0.5H2O计)、白度为92.2%的纯化石膏。

关键词: 磷石膏, 除杂增白, 硅烷偶联剂

Abstract:

The utilization of phosphogypsum resource was limited by the co-existence of the impurities.The technology rule of removing impurities from phosphogypsum with silane coupling agent by wet coupling process was discussesed.Results showed that the silane coupling agent can combine with silica and carboxyl organic impurities in phosphogypsum by hydrogen bonding and dehydration condensation to make the corresponding impurities hydrophobic suspended and separated from by scraping,and leading to the formation of gypsum with a purity of 96.2%(CaSO4·0.5H2O) and a whiteness of 92.2%.

Key words: phosphogypsum, removing impurities and whitening, silane coupling agent

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