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

doi:10.3969/j.issn.0438-1157.2013.06.050

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

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

LI Yadan^1,2, WANG Yujun¹, ZHANG Weidong², LUO Guangsheng¹

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).

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. 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

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)。

Abstract

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

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

CLC Number:

TB321

LI Yadan, WANG Yujun, ZHANG Weidong, LUO Guangsheng. Preparation of silica material with high pore volume by precipitation in membrane dispersion reactor[J]. CIESC Journal, 2013, 64(6): 2276-2284.

李亚丹, 王玉军, 张卫东, 骆广生. 膜分散微反应器沉淀法制备高孔容SiO₂材料[J]. 化工学报, 2013, 64(6): 2276-2284.

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

膜分散微反应器沉淀法制备高孔容SiO₂材料

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

膜分散微反应器沉淀法制备高孔容SiO2材料

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膜分散微反应器沉淀法制备高孔容SiO₂材料