化工学报 ›› 2013, Vol. 64 ›› Issue (6): 2276-2284.DOI: 10.3969/j.issn.0438-1157.2013.06.050

• 材料化学工程与纳米技术 • 上一篇    下一篇

膜分散微反应器沉淀法制备高孔容SiO2材料

李亚丹1,2, 王玉军1, 张卫东2, 骆广生1   

  1. 1. 清华大学化学工程系,化学工程联合国家重点实验室,北京 100084;
    2. 北京化工大学化学工程学院,北京 100029
  • 收稿日期:2012-11-26 修回日期:2013-01-11 出版日期:2013-06-05 发布日期:2013-06-05
  • 通讯作者: 王玉军
  • 作者简介:李亚丹(1984—),女,硕士研究生。
  • 基金资助:

    国家重点基础研究发展计划项目(2013CB733600);国家自然科学基金项目(20976096,21036002);中国石油科技创新基金研究项目(2011D-5006-0407);清华大学基础科研项目(20121087993)。

Preparation of silica material with high pore volume by precipitation in membrane dispersion reactor

LI Yadan1,2, WANG Yujun1, ZHANG Weidong2, LUO Guangsheng1   

  1. 1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China;
    2. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2012-11-26 Revised:2013-01-11 Online:2013-06-05 Published:2013-06-05
  • Supported by:

    supported by the National Basic Research Program of China(2013CB733600),the National Natural Science Foundation of China(20976096,21036002),the Innovative Science and Technology Foundation of PetroChina(2011D-5006-0407)and the Basic Scientific Research of Tsinghua University(20121087993).

关键词: 消光剂, 二氧化硅, 高孔容, 高比表面积, 快速沉淀, 膜分散微反应器

Abstract: The key issue of preparing high pore volume material is strengthening the microscopic supersaturation of precipitation reaction and reducing the particle size.Ultrafine SiO2 was prepared with the fast precipitation method in a membrane dispersion micro-reactor by using sodium silicate and sulfuric acid as raw material.The effects of two-phase flow rates, final pH, salt concentration, aging time, and drying temperature on the specific surface and pore volume were investigated.The results showed that silica powder primary particle size prepared with the membrane dispersion micro-reactor was 10.2 nm, while primary particle size prepared with the stirring method was 20.8 nm, specific surface could be up to 380 m2·g-1 and pore volume was 2.6 ml·g-1 when final pH value was 9.55.Flatting performance test of SiO2 showed that the SiO2 prepared with the membrane dispersion micro-reactor had excellent flatting performance, and extinction index of SiO2 was up to -10.2.

Key words: flatting agent, silica, high pore volume, high specific surface area, fast precipitation, membrane dispersion micro-reactor

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