• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>8th China international nanoscience and technology symposium >Preparation of Plate-shape Nano-Magnesium Hydroxide from Asbestos Tailings
【24h】

Preparation of Plate-shape Nano-Magnesium Hydroxide from Asbestos Tailings

机译：用石棉尾矿制备板状纳米氢氧化镁

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To prepare magnesium hydroxide is one of the effective methods to the comprehensive utilization of asbestos tailings. Nano-scale magnesium hydroxide was prepared and mechanisms of in-situ surface modification were characterized in the paper. Process conditions of preparation of magnesium hydroxide from purified hydrochloric acid leachate of asbestos tailings were optimized and in-situ surface modification of the product was carried out Results showed that optimum process conditions for preparing nano-scale magnesium hydroxide were as follows: initial concentration of Mg2+ in the leachate was 22.75g/L, precipitant was NaOH solution (mass concentration 20%), reaction temperature was 50℃, and reaction time was 5min. The diameter and thickness of the plate nano-scale magnesium hydroxide powder prepared under optimal conditions were about 100 nm and 10 nm, respectively. However, particle agglomeration was obvious, the particle size increased to micron-grade. Dispersity of the magnesium hydroxide powder could be elevated by insitu modification by silane FR-693, titanate YB-502 and polyethylene glycol and optimum dosages were 1.5%, 1.5% and 0.75% of the mass of magnesium hydroxide, respectively. All of the modifiers adsorbed chemically on surfaces of magnesium hydroxide particles, among which Si-O-Mg bonds formed among silane FR-693 and the particle surfaces and TiO-Mg among titanate YB-502 and the surfaces.
机译：制备氢氧化镁是石棉尾矿综合利用的有效方法之一。制备了纳米级氢氧化镁，表征了原位表面改性的机理。优化了石棉尾矿精制盐酸浸出液制备氢氧化镁的工艺条件，并对产品进行了原位表面改性研究结果表明，制备纳米级氢氧化镁的最佳工艺条件为：Mg2 +的初始浓度。浸出液中的总磷为22.75g / L，沉淀剂为NaOH溶液（质量浓度为20％），反应温度为50℃，反应时间为5min。在最佳条件下制备的板状纳米级氢氧化镁粉末的直径和厚度分别为约100nm和10nm。然而，颗粒团聚是明显的，颗粒尺寸增加到微米级。通过硅烷FR-693，钛酸酯YB-502和聚乙二醇的原位改性可以提高氢氧化镁粉末的分散性，最佳剂量分别为氢氧化镁质量的1.5％，1.5％和0.75％。所有的改性剂都化学吸附在氢氧化镁颗粒的表面上，其中在硅烷FR-693与颗粒表面之间形成Si-O-Mg键，在钛酸酯YB-502与表面之间形成TiO-Mg。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号