Device for preparing propylene and ethylene by coupling catalytic cracking of C4, light oil and methanol

• Main Authors: DING YANMING, GUO JINBAO, GU ZONGCHANG, GONG XIAOYAN, ZHANG RUICHI, YU XIANGLIN, CHEN BAOHUA
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2020
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The utility model discloses a device for preparing propylene and ethylene by coupling catalytic cracking of C4, light oil (containing naphtha, stable light hydrocarbon, straight-run gasoline, raffinate oil, gasoline and the like) and methanol. The device comprises a raw material pretreatment unit, a catalytic cracking reaction-regeneration unit, a separation unit and a dry gas aromatization unit.The utility model mainly solves the problem of heat coupling in the process of preparing propylene ethylene by catalytic cracking of C4 and light oil and preparing propylene ethylene by methanol, realizes comprehensive utilization of various raw materials, and can ensure the production continuity. The device disclosed by the utility model can be used in industrial devices for producing propylene and ethylene, not only can relieve the supply and demand contradiction of propylene, but also can improve the economic benefits of petrochemical enterprises. 本实用新型公开了一种利用碳四、轻质油(含石脑油、稳定轻烃、直馏汽油、抽余油、汽油等)和甲醇耦合催化裂解制丙烯乙烯的装置。该装置包括原料预