化工进展 ›› 2016, Vol. 35 ›› Issue (10): 3281-3287.DOI: 10.16085/j.issn.1000-6613.2016.10.037

• 材料科学与技术 • 上一篇    下一篇

纳米氢氧化镁的超重力沉淀法制备及沉降性能

申红艳, 刘有智   

  1. 中北大学超重力化工过程山西省重点实验室, 山西 太原 030051
  • 收稿日期:2016-04-18 修回日期:2016-07-27 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: 申红艳(1982-),女,讲师,在职博士研究生,主要从事纳米氢氧化镁阻燃剂的研究。E-mail:shy_shenhongyan@163.com
  • 作者简介:申红艳(1982-),女,讲师,在职博士研究生,主要从事纳米氢氧化镁阻燃剂的研究。E-mail:shy_shenhongyan@163.com。
  • 基金资助:
    国家自然科学基金项目(21376229)。

Preparation of magnesium hydroxide nanoparticles by high gravity precipitation method and their settlement property

SHEN Hongyan, LIU Youzhi   

  1. Shanxi Province Key Laboratory of High Gravity Chemical Engineering, North University of China, Taiyuan 030051, Shanxi, China
  • Received:2016-04-18 Revised:2016-07-27 Online:2016-10-05 Published:2016-10-05

摘要: 针对传统沉淀法存在的问题,提出采用一种新的液-液反应机制——撞击流-旋转填料床(IS-RPB)反应器制备纳米氢氧化镁,通过单因素实验和正交试验研究了镁离子初始浓度、镁离子和氢氧根离子摩尔浓度比、转速、液体流量及反应温度等因素对氢氧化镁浆料沉降性能的影响规律,确定了最佳工艺条件。研究表明:在镁离子初始浓度为0.70mol/L、镁离子和氢氧根离子摩尔浓度比为1/2、转速为900r/min、液体流量为40L/h、反应温度为70℃的最佳工艺条件下,得到了粒径为60~80nm的六方片状氢氧化镁,其沉降性能良好。

关键词: 沉淀, 超重力, 沉降, 氢氧化镁, 浆料

Abstract: Aiming at solving the problems of liquid precipitation method,this paper proposed a novel impinging stream-rotating packed bed reactor(IS-RPB)to prepare magnesium hydroxide nanoparticles. The effects of various operating variables,including the initial Mg2+ concentration,reactant concentration ratio,rotation speed,liquid flow rate,and reaction temperature,on the settlement property of magnesium hydroxide slurry were determined by means of single factor test method and multi-factor orthogonal test procedure and the optimum conditions were obtained. The obtained magnesium hydroxide nanoparticles were of 60~80nm in diameter,regular hexagonal plate in appearance,and with excellence settlement property,when the initial Mg2+ concentration was 0.70mol/L,reactant concentration ratio was 1/2,rotation speed was 900r/min,liquid flow rate was 40L/h,and reaction temperature was 70℃.

Key words: precipitation, high gravity, sedimentation, magnesium hydroxide, slurry

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