用煤系高岭土制取白炭黑的研究

介绍了以煤系高岭土为原料制备白炭黑的新方法。详细考察了高岭土活化温度、酸度、酸量、反应时间等对白炭黑物化参数的影响,并分别用X射线衍射、扫描电子显微镜、激光粒度仪及N2静态容量吸附法等物理手段测试了白炭黑的物相结构、表观形貌、二氧化硅含量、粒度及比表面积和孔结构。结果表明,用该方法制得的白炭黑比表面和纯度远远高于国家标准,并且中孔孔隙结构发育,粒度分布集中。

Preparation of amorphous silica from coal-based kaolin

A novel preparation method for amorphous silica from coal-based kaolin was developed. The properties of the sample were extensively investigated by changing the addition amount and concentration of acid, reaction time, calcination temperature and so on. The surface area and pore distribution, phase structure, morphology, particle size distribution, the amount of Si and Al of samples were respectively characterized by methods of N\-2-adsorption, X-ray diffraction, scan electron microscope and laser particle analyzer. The results show that the surface area of amorphous silica is far larger than that of traditional method. The amorphous silica bears the developed mid pore structure, villiform pattern and uniform particle size. The quality of amorphous silica obtained by novel method is superior to the state quality standard.