...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Chemical Society of Japan >Preparation of Porous Supports in the SiO_2-ZrO_2-Na_2O System
【24h】

Preparation of Porous Supports in the SiO_2-ZrO_2-Na_2O System

机译：SiO_2-ZrO_2-Na_2O体系中多孔载体的制备

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

A new method for preparing porous supports in the SiO_2-ZrO-2 system was investigated. A microspherical silica gel impregnated with ZrOCl_2 and NaCl was heated and subsequently washed with water. Crystallization of silica proceeded in supports prepared by heating the mixture of silica gel and NaCl. In contrast, crystallization of supports as well as their sintering was suppressed in the case of the gel impregnated with ZrOCl_2 in addition to NaCl, and porous supports with the SiO_2-ZrO_2-Na_2O composition were formed. A porous-glass-like texture similar to the texture resulting from the phase-separation method was observed inside the microspherical particles as well as on their surface. Microspherical supports, whose pore volume was more than 1 cm~3 g~(-1) and whose mode pore radii ranged from 270 to 640 A, were obtained by controlling the synthetic conditions for the silica gel, the amount of ZrOCl_2 added to the gel, and the temperature of the heat-treatment of the mixture.
机译：研究了一种在SiO_2-ZrO-2体系中制备多孔载体的新方法。加热浸渍有ZrOCl_2和NaCl的微球形硅胶，然后用水洗涤。二氧化硅的结晶在通过加热硅胶和NaCl的混合物制备的载体中进行。相反，在除了NaCl之外还用ZrOCl_2浸渍的凝胶的情况下，抑制了载体的结晶以及其烧结，并且形成了具有SiO_2-ZrO_2-Na_2O组成的多孔载体。在微球形颗粒内部以及在其表面上观察到类似于由相分离法得到的纹理的多孔玻璃状纹理。通过控制硅胶的合成条件，制备了孔径大于1 cm〜3 g〜（-1），模孔半径为270〜640 A的微球形载体。凝胶和混合物的热处理温度。

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