摘要
催化裂化催化剂的活性中心以Y型分子筛为主,通过离子交换的方式可以将NaY分子筛中Na+降低至一定水平。离子交换过程中,铵盐的引入增加了污水处理成本,硝酸稀土的引入增加了尾气氮氧化物处理难度。本文以15000吨/年分子筛装置为例,调整离子交换方式,取消铵盐交换,生产过程不产生高氨氮废水;调整稀土交换方式,尾气中不含氮氧化物。这种工艺可以实现A类分子筛的无铵交换,提升企业经济效益,加强环境保护,为催化裂化催化剂降本增效提供强有力的技术支撑。
Y-type molecular sieve is the active center of catalytic cracking catalyst,and Na+in NaY molecular sieve can be reduced to a certain level through ion exchange.During the ion exchange process,the introduction of ammonium salts increases the cost of wastewater treatment;The introduction of rare earth nitrate makes it difficult to treat nitrogen oxides in exhaust gas.Taking the 15000 tons/year molecular sieve device as an example,the ion exchange method was adjusted to eliminate ammonium salt exchange,and the production process did not produce high ammonia nitrogen wastewater;Adjusting the rare earth exchange method to eliminate nitrogen oxides in the exhaust gas can achieve ammonium free exchange of A-class molecular sieves,which is of great significance for improving the economic benefits and environmental protection of enterprises,and providing strong technical support for reducing costs and increasing efficiency of catalytic cracking catalysts.
作者
郭璞
王兆楠
臧亚宁
GUO Pu;WANG Zhaonan;ZANG Yaning(Kungang Advanced Manufacturing(Beijing)Co.,Ltd.Lanzhou Branch Changting Base,Longyan Fujian 366300)
出处
《中国科技纵横》
2025年第10期79-81,共3页
China Science & Technology Overview
关键词
分子筛
无铵交换
降本增效
molecular sieve
no ammonium exchange
FCC catalyst
