文档介绍：2
第 38卷第 5期无机盐工业
2006年 5月 AN IC CHEM ICALS INDUSTRY 32
白炭黑制备工艺对比表面积和吸油值的影响
赵柄
(北京化工大学教育部超重力工程中心,北京 100029)
摘要:利用正交设计安排实验,在超重力旋转床中,采用硫酸沉淀法制备超细白炭黑,研究实验制备工艺条
件 pH、硅酸钠浓度、温度、电解质和旋转床转数以及不同干燥方式对白炭黑的 BET比表面积和 DBP吸油值的影
响。实验结果表明,反应终止时 pH对白炭黑的 BET比表面积影响最大,其次是温度、电解质、硅酸钠的浓度和旋
转床的转数。干燥方式是影响 DBP吸油值的决定性因素,其次是温度、电解质、旋转床的转数、硅酸钠的浓度和反
应终止时 pH。制得产品的 BET比表面积 140~351 m2 /g, DBP吸油值 1. 42~4. 41 mL /g。
关键词:白炭黑;比表面积;吸油值;旋转填充床
中图分类号: TQ127. 2 文献标识码: A 文章编号: 1006 - 4990 (2006) 05 - 0023 - 04
Influence of prepar ing technology on spec if ic surface area and o il absorption va lue in the
prepara tion of prec ip ita ted silica
Zhao B ingguo, Guo Kai, Xie Xiaop ing
(Research Center of the M inistry of Education for H igh Gravity Engineering and Technology,
B eijing U niversity of Chem ical Technology, B eijing 100029, China)
Abstract: The influences of p rocess conditions, such as pH, concentration of sodium silicate, reaction temperature, elec
trolyte, rotating speed and drying method on the BET surface area and DBP oil absorp tion value of p recip itated silica made
by sulfuric acid method in RPB ( rotating packed bed) were studied bymeans of orthogonal design test. It has been found that
pH has most significant influence on BET surface area. The sequences are reaction temperature, electrolyte, concentration of
sodium silicate and rotational speed. DBP oi