油页岩残渣制备白炭黑及粒径分布规律研究

摘要

The work resorted CO2 replace strong acid as latent acidifier and highly selective separation method of acetic acid purifying, took residue of oil shale as raw material investigate preparation of high quality silica on the conditions of low corrosion and energy consumption, discover technological conditions influences on particle size of product. Obtained silica researched by means of XRF, IR, XRD and SEM, optimum technological conditions of preparation silica from NaSiO3 solution leached from residue of oil shale determined by homogeneous chemical precipitation method and the results as following, the reaction temperature is 50 'C, the concentration of sodium silicate 0. 027 g/L, CO2 flow rate is 20 mL/min, the dose of surfactant is 0. 007 g/ mL of volume of total system. The particle size of silica obtained on the optimum technological conditions get minimum value of 20 nm-30 nm and purity is 98. 4% after acetic acid purifying.%采用二氧化碳为潜伏酸化剂代替强酸,结合醋酸的高选择性分离方法,研究以油页岩制油残渣为原料,低腐蚀低能耗条件下制备高品质白炭黑的工艺方法,并揭示工艺条件对白炭黑产品的粒径分布影响规律.经X射线荧光光谱分析、红外光谱分析、X射线衍射和扫描电镜分析,对产物白炭黑进行了表征.结果表明,采用均相化学沉淀法,由残渣碱提取液硅酸钠溶液制备白炭黑的最佳工艺条件为:反应温度50℃,硅酸钠溶液浓度为0.0 274 g/mL,C,2流速为20 mL/min,表面活性剂聚乙二醇6 000的用量为0.007 g/mL,此工艺条件下得到的白炭黑粒径最小,为20 nm～30 nm,经醋酸分离提纯后的白炭黑纯度为98.4％.