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    • 5. 发明授权
    • Nitrogen resistant paraffin hydroisomerization catalysts
    • 耐氮石蜡加氢异构化催化剂
    • US4814543A
    • 1989-03-21
    • US138749
    • 1987-12-28
    • Nai Y. ChenWilliam E. GarwoodSharon B. McCullen
    • Nai Y. ChenWilliam E. GarwoodSharon B. McCullen
    • B01J29/66B01J29/70B01J29/74C07C5/27C10G45/64C07C5/13
    • C10G45/64B01J29/064B01J29/67B01J29/7484B01J29/7492C07C5/2791B01J2229/42
    • The present invention includes a process and catalyst composition for paraffinic isomerization of a hydrocarbon feedstock which has a paraffin content having no more than 20 carbon atoms per molecule. The feedstock is contacted with a crystalline aluminosilicate zeolite catalyst having pore openings defined by: (1) a ratio of sorption of n-hexane to o-xylene, on a volume percent basis, of greater than about 3, which sorption is determined at a P/P.sub.o of 0.1 and at a temperature of 50.degree. C. for n-hexane and 80.degree. C. for o-xylene and (2) by the ability of selectively cracking 3-methylpentane (3MP) in preference to the doubly branched 2,3-dimethylbutane (DMB) at 1000.degree. F. and 1 atmosphere pressure from a 1/1/1 weight ratio mixture of n-hexane/3-methyl-pentane/2,3-dimethylbutane, with the ratio of rate constants k.sub.3MP/ k.sub.DMB determined at a temperature of 1000.degree. F. being in excess of about 2, e.g., ZSM-22, ZSM-23, AXM-35 and mixtures thereof, in combination with a Group VIII metal, and having a zeolite SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least about 20:1 at a temperature and pressure suitable for isomerization.
    • 本发明包括用于烃原料的链烷烃异构化的方法和催化剂组合物,其具有每分子具有不超过20个碳原子的链烷烃含量。 原料与具有孔开口的结晶铝硅酸盐沸石催化剂接触,所述沸石催化剂的定义如下:(1)正丁烷与邻二甲苯的吸附比例,以体积百分数计,大于约3,该吸附在 P / Po为0.1,温度为50℃,正己烷和80℃为邻二甲苯,(2)选择性裂解3-甲基戊烷(3MP)优于双支链2 ,三甲基丁烷(DMB)在1000°F和1大气压下,由正己烷/ 3-甲基戊烷/ 2,3-二甲基丁烷的1/1/1重量比混合物与速率常数比例k3MP / kDMB在1000°F的温度下测定为超过约2,例如ZSM-22,ZSM-23,AXM-35及其混合物,与VIII族金属组合,并具有SiO 2 / Al 2 O 3沸石 在适于异构化的温度和压力下至少约20:1的比例。