催化裂化汽油烯烃选择性裂解制丙烯工艺的开发

针对催化裂化汽油中烯烃含量高,国际市场对丙烯需求量大的现状,在扬州石化有限责任公司工业侧线装置上进行了FCC汽油烯烃裂化制丙烯工艺的工业试验。该工艺采用分子筛涂覆的规整结构催化剂,在自建的20 kg/h工业小试装置上,按照优化的工艺参数和工艺过程,促进FCC汽油中烯烃的选择性裂化,在降低汽油烯烃含量的同时,气相产物中三烯(乙烯、丙烯和丁烯)的选择性可大于80%,其中丙烯选择性可达到30%～40%。

DEVELOPMENT OF SELECTIVE CRACKING OLEFINS IN FCC NAPHTHA FOR PROPYLENE PRODUCTION PROCESS

In order to reduce the olefin content in FCC naphtha and meanwhile produce propylene in high demand, the onsite test of side-stream for selective cracking olefins in FCC naphtha to produce propylene process was carried out in Yangzhou Petrochemical Company. A 20 kg/h test device was set up for this commercial trial and molecular sieve coated monolithic catalysts were used. Results showed that under optimized process parameters while reducing the olefin content in FCC naphtha, the selectivity for light olefins (ethylene, propylene and butenes) in gaseous product could be more than 80%, in which the selectivity of propylene reached 30~40%.