This paper descdbes the development of cascade minirings(CMR) to su-per-mini rings(SMR), their technical features and their use in gas purifi-cation in ammonia production.

• 本文介绍了从阶梯短环(CMR)到超级扁环(SMR)的发展过程、技术特点和在合成氨气体净化中的应用。