02318nmc a2200301 4500 20260520005655.0 260224s xxu CD W938 1 0013960 WPC (16th.) DCC Technology and its commercial experience 12/09/06 ; 26/08/2003 7 p. Resumen del autor, extraído del trabajo. DCC is a new technology derived from FCC for propylene production. The propylene yields can reach 23wt% with paraffinic feed and around 17wt% with intermediate base feed. A portion of DCC cracked naphtha recycled in a commercial unit resulted in a propylene yield increment of 3.5wt% at some expense of naphtha. The total BTX in the 75~150oC naphtha fraction was 57.6vol%, in which toluene and xylenes were 21.9vol% and 30.3vol% respectively. DCC catalyst consists of a modified mesopore zeolite with pentasil structure for primary product of naphtha range to undergo secondary cracking for producing light olefins. A series of DCC catalysts was formulated for various objectives, such as maximum propylene, maximum isoolefins, and metal tolerance for residual oil processing, etc. Seven commercial units have been put into production since 1990 inside and outside of China, in which three of them were revamped from existing FCCUs, and the other four were grassroots units including a 750Kt/a unit in TPI Company, Thailand. Currently, the TPI unit is running in full design capacity with about 40wt% of atmospheric residual oil in the feedstock. Although the feedstock is much heavier than design, the propylene yield still keeps around the design value. The commercial experiences of some units are presented. v. 4, p. 238 CONGTP Zai-Ting, Li 10035 Fu-Kang, Jiang 10036 Chao-Gang, Xie 10037 You-Hao, Xu 10038 Research Institute of Petroleum Processing, SINOPEC 9845 World Petroleum Congress (16th. : 2000 jun. 11-15 : Calgary, Alberta, Canada) 34 Fu-Kang, Jiang 10036 Chao-Gang, Xie 10037 You-Hao, Xu 10038 Research Institute of Petroleum Processing, SINOPEC 9845 Zai-Ting, Li 10035 133624 133624 0 0 0 0 204543 BAAB BAAB CD W938 1 0013960 2026-03-04 200006123 0 CD W938 1 0013960 200006123 2026-03-04 14:03:29 2026-03-04 ARCHIVO