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    • 10. 发明授权
    • Hydrocarbon conversion to propylene with high silica medium pore zeolite catalysts
    • 烃转化为丙烯与高二氧化硅中孔沸石催化剂
    • US06656345B1
    • 2003-12-02
    • US09304657
    • 1999-05-04
    • Tan-Jen ChenMechilium (Marcel) Johannes Gerardus JanssenLuc Roger Marc MartensMachteld Maria MertensPhilip Andrew RuziskaLynn L. ZhaoJannetje Maatje van den Berge
    • Tan-Jen ChenMechilium (Marcel) Johannes Gerardus JanssenLuc Roger Marc MartensMachteld Maria MertensPhilip Andrew RuziskaLynn L. ZhaoJannetje Maatje van den Berge
    • C10G1102
    • C10G11/05C10G2400/20
    • The invention provides a method for converting a hydrocarbon feedstock to propylene comprising: contacting an olefinic hydrocarbon feedstock boiling in the naphtha range with a catalyst comprising a zeolitic catalyst selected from the group consisting of medium pore zeolites having a ratio of silica to alumina above 200 and pore diameter less than 0.7 nm under cracking conditions to selectively produce propylene. The preferred catalyst comprises of a zeolite having an 8, 10, or 12 membered ring pore structure. The preferred catalysts are selected from the group consisting of zeolites from the families MFI, MEL, MTW, TON, MTT, FER, MFS, and the zeolites ZSM-21, ZSM-38 and ZSM-48. Preferably the method is carried out to produce propylene with greater than 50% specificity, more preferably, the propylene to butylene ratio is at least 2:1 or a propylene to ethylene ratio of at least 4:1. The olefinic hydrocarbon feedstock consists essentially of hydrocarbons boiling within the range of 18° to 220° C. (65° F. to 430° F.). The olefinic hydrocarbon feedstock comprises from about 10 wt % to about 70 wt % olefins. Preferably the olefinic hydrocarbon feedstock comprises from about 5 wt % to about 35 wt % paraffins. The catalyst is contacted in the range of 400° C. to 700° C., a weight hourly space velocity (“WHSV”) of 1 to 1,000 hr−1 and a pressure of 0.1 to 30 atm. absolute.
    • 本发明提供了一种用于将烃原料转化成丙烯的方法,包括:使在石脑油范围沸腾的烯烃原料与包含沸石催化剂的催化剂接触,所述催化剂选自二氧化硅与氧化铝的比例大于200的中孔沸石, 孔径小于0.7nm,在选择性地生产丙烯。 优选的催化剂包括具有8,10或12元环孔结构的沸石。 优选的催化剂选自族MFI,MEL,MTW,TON,MTT,FER,MFS和沸石ZSM-21,ZSM-38和ZSM-48的沸石。 优选地,该方法进行以产生具有大于50%特异性的丙烯,更优选丙烯与丁烯的比率为至少2:1或丙烯与乙烯的比率为至少4:1。 烯烃原料基本上由沸点在18°至220℃(65°F至430°F)范围内的烃组成。 烯烃原料包含约10重量%至约70重量%的烯烃。 优选地,烯烃原料包含约5重量%至约35重量%的链烷烃。 催化剂在400℃至700℃的范围内接触,1至1,000小时-1的重时空速(“WHSV”)和0.1至30大气压的压力。 绝对。