The invention relates to a microwave assisted regeneration method for FCC waste catalyst, which belongs to the two resource comprehensive recycling technology field. In this method, FCC waste catalyst was first used as a solvent of sodium hydroxide solution with a concentration of 0.1~0.8mol/L. A part of vanadium in FCC waste catalyst was removed by alkaline leaching of 10~60min under microwave radiation and 50~100 C. The leaching residue and leaching solution containing vanadium were obtained. Leaching residue is obtained after alkali leaching, with a concentration of 1wt%~8wt% hydrochloric acid solution as solvent. Leaching solution of rare earth, iron, vanadium, nickel and leaching residue of silicon aluminum salt molecular sieves with lattice structure are obtained under the condition of microwave radiation and 50~100 C. The leaching residue of rare earth elements is recovered, and the removal of rare earth elements, iron, vanadium and nickel metals is achieved. Besides, the most important thing is to retain the structure of zeolites, which can be used to prepare new FCC catalysts. The method has the advantages of simple treatment process and short operation time, and obtains the complete structure of the silicate aluminum salt molecular sieve in the leaching residue. One
【技术实现步骤摘要】
一种微波辅助再生FCC废催化剂方法
本专利技术涉及一种微波辅助再生FCC废催化剂方法,属于二次资源综合回收利用
技术介绍
催化裂化(FCC)是炼油企业由重质油料生产汽油、柴油、低碳烯烃等高价值产品的核心技术之一。FCC催化剂是石油冶炼过程中使用量最大的催化剂,目前我国FCC催化剂的使用量在15万吨/年以上。随着原油日益重质化和劣质化,原油在催化裂化过程中,原油中的金属化合物会完全分解,并积留在FCC催化剂上。随着FCC催化剂的不断循环利用,FCC催化剂上沉积的金属会逐渐增多,导致活性和重油转化能力都下降,因此裂解工厂每日需要排放大量的废催化剂,并补充等量的新催化剂。预计每年FCC废催化剂的增加量约为5%,很快就会突破每年产生20万吨的FCC废催化剂。首先,FCC废催化剂由沸石(分子筛)构成,是以SiO2和Al2O3为主要成分的,具有晶格结构的结晶硅铝盐,具有较大的比表面积和孔体积。FCC废催化剂虽然失去了催化活性,但其内部结构并未遇到完全破坏,仍然有一定的利用价值。其次,我国稀土在石化催化领域中的消费量占稀土总消费量的10%以上。随着资源的日益短缺,从石油化工催化剂废料中回收有价稀土成分具有很好的社会和经济效益。此外,废FCC催化剂中一般含有较高比例的金属,如钒、镍、铁、钙等。这些金属含量高、中毒严重的废FCC催化剂一般很难再生,并被作为固体废弃物进行填埋,这样不仅会浪费大量的资源,且会对人类的生存环境构成严重威胁。因此,如何有效处理这类FCC废催化剂对石油化工行业起到了极大重要作用。中国专利CN201310290526.3公开一种从废FCC催化 ...
【技术保护点】
1.一种微波辅助再生FCC废催化剂方法,其特征在于具体步骤如下:
【技术特征摘要】
1.一种微波辅助再生FCC废催化剂方法,其特征在于具体步骤如下:步骤1、首先将FCC废催化剂与浓度为0.1~0.8mol/L的氢氧化钠溶液按照液固比为3~15:1mL/g混合后在微波辐射功率为400~2000W,微波浸出温度为50~100℃的条件下碱浸10~60min得到碱浸出渣和含钒的浸出液;步骤2、将步骤1得到的碱浸出渣与浓度为1wt%~8wt%的盐酸溶液按照液固比为3~15:1mL/g混合后在微波辐射功率为400~2...
【专利技术属性】
技术研发人员:巨少华,黎氏琼春,彭金辉,李熙腾,王奇,张利波,田时泓,周澳,朱艳芳,
申请(专利权)人:昆明理工大学,
类型:发明
国别省市:云南,53
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