草酸作为交换介质对FCC催化剂后处理制备工艺的影响  

Influence of post-treatment process of oxalic acid as the exchange medium on FCC catalyst

作　　者：王世环[1] 张杰潇 许明德[2] 田辉平[2] 

机构地区：[1]中国石油化工股份有限公司催化剂齐鲁分公司,山东淄博255000 [2]中国石油化工股份有限公司石油化工科学研究院,北京100083

出　　处：《工业催化》2014年第11期859-864,共6页Industrial Catalysis

摘　　要：将NaY分子筛、拟薄水铝石、铝溶胶和高岭土打浆混合,喷雾干燥制得催化剂粉体NaY35。以NaY35为起始原料,研究探索催化剂焙烧和使用草酸替换铵离子进行洗涤的后处理制备工艺,最终制得Na2O质量分数小于0.3%,且基本性质能够满足工业要求的FCC催化剂。采用XRD、BET、NH3-TPD、IR和SEM等考察催化剂性质,结果表明,以草酸为交换介质制备的催化剂表面有完整的孔道结构,酸量大幅提高,磨损指数满足工业要求,同时重油转化率和微反活性高。NaY35 catalyst powder were prepared by mixing NaY zeolite,pseudo-boehmite,aluminum sol and kaolin and then spray-drying. Using NaY35 catalyst powder as the starting materials,the influence of the post-treatment technology such as calcination,exchange of oxalic acid and ammonium ion and washing on Na2 O contents of NaY35 catalyst microspheres was investigated. NaY35 catalyst microspheres with Na2 O of 0. 3% mass fraction was obtained,and their properties could basically meet the requirement for commercial application. The as-prepared catalyst was characterized by means of XRD,BET,NH3-TPD,IR and SEM techniques. The results showed that the catalyst prepared with oxalic acid as the exchange medium had complete pore structure on its surface,and its acid amount was increased greatly;the abrasion index of the catalyst basically met the requirement for commercial application,which was beneficial to catalytic cracking reaction for a long time. Moreover,the conversion rate of heavy oil and microreaction activity of the catalyst were high.

关 键 词：催化剂工程 催化裂化催化剂 草酸 离子交换 后处理工艺 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]