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 ›› 2025, Vol. 57 ›› Issue (12): 56-62.doi: 10.19964/j.issn.1006-4990.2024-0618

• 研究与开发 • 上一篇    下一篇

臭氧氧化法去除氟硅酸中氯的工艺研

陈义1(), 李天祥1, 刘松林2, 隋岩峰2(), 李白玉2, 朱静1()   

  1. 1.贵州大学化学与化工学院,贵州 贵阳 550025
    2.磷矿及其共伴生资源绿色高效开发;利用全国重点实验室,贵州 贵阳 550014
  • 收稿日期:2024-11-20 出版日期:2025-12-10 发布日期:2025-08-01
  • 通讯作者: 朱静(1972— ),女,教授,主要研究方向为化学工艺研究;E-mail:jzhu1@gzu.edu.cn
    隋岩峰(1981— ),男,高级工程师,主要研究方向为氟硅化工研究;E-mail:1223260229@qq.com
  • 作者简介:陈义(1997— ),女,硕士,主要研究方向为氟化工方面研究;E-mail:2359062773@qq.com

Study on removal process of chlorine from fluorosilicic acid by ozonidation

CHEN Yi1(), LI Tianxiang1, LIU Songlin2, SUI Yanfeng2(), LI Baiyu2, ZHU Jing1()   

  1. 1. School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China
    2. State Key;Laboratory of Green and Effciient Development of Phosphorus Resources,Guiyang 550014,China
  • Received:2024-11-20 Published:2025-12-10 Online:2025-08-01

摘要:

湿法磷酸工艺副产物氟硅酸中含有氯等多种杂质,这些杂质的存在不仅影响氟硅酸的纯度和后续产品的质量,还会造成生产设备腐蚀和环境污染。用单因素法对臭氧氧化法去除氟硅酸溶液中的氯进行实验研究,分析臭氧流量、氟硅酸含量、反应时间、反应温度对臭氧氧化去除氟硅酸溶液氯离子的影响,为了更加准确地确定臭氧除氯的参数,选取反应时间、反应温度、氟硅酸含量为影响因素,以氯去除率和氟损失率为响应值,采用单因素实验法运用Design-Expert13中的Box-Behnken(BBD)方法设计3因素3水平实验方案来进行响应面实验,结果得出臭氧去除氟硅酸中氯的最佳条件为臭氧流量为48 g/h、反应温度为45 ℃、反应时间为4 h、氟硅酸质量分数为36.00%。在最佳实验条件下,氯的去除率为96.85%,氟的损失率为3.29%,研究结果为脱除氟硅酸中氯提供新思路。

关键词: 臭氧氧化法, 氟硅酸, 脱氯,

Abstract:

The by-product fluosilicic acid produced by the wet-process phosphoric acid production contains various impurities such as chlorine.The presence of these impurities not only affects the purity of fluosilicic acid and the quality of subsequent products,but also causes corrosion to the production equipment and pollutes the environment.In this paper,the single-factor method was used to conduct an experimental study on the removal of chlorine from fluosilicic acid solution by ozone oxidation.The effects of ozone flow rate,fluosilicic acid content,reaction time,and reaction temperature on the removal of chloride ions from fluosilicic acid solution by ozone oxidation were analyzed.In order to more accurately determine the parameters for ozone chloride removal,based on the results of the single-factor experiments,three factors that had a significant impact on the chloride removal rate were selected,including reaction time,reaction temperature,and fluosilicic acid content.The Box-Behnken(BBD) method in Design-Expert 13 was used to design a 3-factor 3-level experimental scheme for response surface experiments.The results showed that the optimal conditions for ozone to remove chlorine from fluosilicic acid were:ozone flow rate of 48 g/h,reaction temperature of 45 ℃,reaction time of 4 h,and fluosilicic acid content of 36.00%.Under the best experimental conditions,the chlorine removal rate was 96.85%,and the fluoride loss rate was 3.29%.This study could provide new ideas for removing chlorine from fluosilicic acid.

Key words: ozone oxidation, fluorosilicic acid, dechlorination, fluorine

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