韩城高岭土的性质及其原位晶化所制FCC催化剂的研究

在实验室进行了韩城高岭土的性质及其原位晶化所制FCC催化剂的研究。结果表明韩城高岭土的基本性质符合全白土型原位晶化催化剂的要求;该高岭土在原位晶化体系中具有适度活性硅和较快活性铝的碱溶速度,以及良好的晶化性能和裂化性能。与现用的苏州高岭土相同工艺制备的对比剂相比,前者较后者的比表面积、孔体积和微反活性高,但磨损指数略大;以新疆减压宽馏分和减压渣油的混合油为原料,进行裂化性能考察的结果表明,汽油和轻质油收率较高,干气和焦炭收率略高,汽油中的烯烃含量较低,芳烃含量较高,辛烷值(MON)较高。

STUDY ON THE PROPERTIES OF HANCHENG KAOLINE AND THE FCC CATALYST FROM ITS IN-SITU CRYSTALLIZATION

The properties of Hancheng kaoline and the FCC catalyst from its in situ crystallization were studied in the laboratory. The result showed that the essential properties of Hancheng kaoline were qualified for making catalyst by in situ crystallization, which possessed stronger and appropriate alkaline dissolvable rates for active alumina and active silica respectively, as well as good performance of crystallization and cracking. In comparison the catalyst prepared by Hancheng kaoline with the present catalyst using Suzhou kaoline at same preparing conditions, the former had higher surface area and micro activity, larger pore volume, however, the attrition index was somewhat higher; the cracking performance with a mixed feedstock of Xinjiang VGO and VR showed that the former had higher naphtha and light oil yields, but the dry gas and coke yields were also somewhat higher; the olefin content in naphtha was lower and the aromatics content and MON were higher.