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 ›› 2024, Vol. 56 ›› Issue (5): 39-44.doi: 10.19964/j.issn.1006-4990.2023-0371

• 研究与开发 • 上一篇    下一篇

NaVO3-NH4Cl-H2O体系下NH4VO3溶析结晶工艺

李春丽(), 张焕焕, 程卓, 汤秀华, 张峰榛(), 叶宇玲   

  1. 四川轻化工大学化学工程学院,四川 自贡 643000
  • 收稿日期:2023-07-13 出版日期:2024-05-10 发布日期:2024-05-15
  • 通讯作者: 张峰榛(1980— ),男,博士,副教授,主要研究方向为化工传质与分离;E-mail:zhangfengzhen421@163.com
  • 作者简介:李春丽(1999— ),女,硕士研究生,研究方向为无机化工;E-mail:1220925871@qq.com
  • 基金资助:
    国家自然科学基金资助项目(21868014);四川省科技厅项目(2022YFG0134)

Anti-solvent crystallization process of NH4VO3 in NaVO3-NH4Cl-H2O solution system

LI Chunli(), ZHANG Huanhuan, CHENG Zhuo, TANG Xiuhua, ZHANG Fengzhen(), YE Yuling   

  1. School of Chemical Engineering,Sichuan University of Science & Engineering,Zigong 643000,China
  • Received:2023-07-13 Published:2024-05-10 Online:2024-05-15

摘要:

针对NH4VO3冷却结晶过程中存在结晶诱导期长、结晶收率低等问题,提出了NH4VO3溶析结晶工艺。以乙醇为溶析剂、NH4Cl为沉淀剂,在单因素实验基础上采用响应曲面法考察了乙醇-浸取液体积比、NH4Cl初始浓度和温度3个因素对产品收率的影响,并得到预测产品收率的回归方程。研究结果表明:回归方程能较好地预测产品收率;3个因素中只有乙醇-浸取液体积比和NH4Cl初始浓度之间存在显著的交互作用;3个因素对产品收率影响程度从高到低的顺序依次为乙醇-浸取液体积比、NH4Cl初始浓度、温度;在结晶时间为150 min、NH4Cl初始浓度为0.68 mol/L、温度为278.15~288.15 K、乙醇-浸取液体积比为(1.5:1)~(2:1)条件下可获得收率大于95%的NH4VO3产品,产品形貌为花簇状结构,尺寸为5~10 μm。

关键词: 溶析结晶, 响应曲面法, 偏钒酸铵, 乙醇

Abstract:

The anti-solvent crystallization technology of NH4VO3was proposed to deal with the problems of long induction period and low product yield in the process of NH4VO3 cooling crystallization.By using ethanol as anti-solvent and NH4Cl as precipitator,the effects of volume ratio of ethanol-leaching solution,NH4Cl initial concentration and temperature on the product yield were investigated by response surface methodology based on single factor experiment and the regression equation for predicting the product yield was obtained.The results showed that the regression equation could predict the product yield well.There was only a significant interaction between the volume ratio of ethanol-leaching solution and the initial concentration of NH4Cl.The influence of three factors on the product yield from high to low was volume ratio of ethanol-leaching solution,initial concentration of NH4Cl,temperature.The NH4VO3 products with yield greater than 95% were prepared under the conditions of crystallization time of 150 min,NH4Cl initial concentration of 0.68 mol/L,temperature of 278.15~288.15 K and volume ratio of ethanol-leaching solution of(1.5:1)~(2:1).The product morphology was flower-like structure with the size of 5~10 μm.

Key words: anti-solvent crystallization, response surface methodology, ammonium metavanadate, ethanol

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