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    • 23. 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。
    • 25. 发明授权
    • Dispersed catalyst cracking with methanol as a coreactant
    • 用甲醇作为共反应剂分散催化剂裂解
    • US4627911A
    • 1986-12-09
    • US815660
    • 1985-12-30
    • Nai Y. ChenThomas F. Degnan, Jr.
    • Nai Y. ChenThomas F. Degnan, Jr.
    • C10G11/05C07C1/24C10G47/16
    • C10G11/05
    • A catalytic cracking process is described in which methanol is a coreactant with gas oil in combination with a small amount (catalyst/oil 0.01) of a dispersed, very fine, and highly active catalyst powder, such as ZSM-5B. The methanol is preferably admixed with the catalyst before admixture with the oil in order to protect the catalyst from adsorption of poisonous compounds (e.g., nitrogenous compounds) during the initial stages of the reaction, particularly if the methanol is insoluble in a non-polar hydrocarbon feed. The premixed materials are fed into a riser reactor. The residence time in the reactor is 6-15 seconds. Preferably, the catalyst is not regenerated. The quantity of methanol is maintained so that its exothermic reaction is approximately heat balanced with the endothermic catalytic cracking reaction.
    • 描述了催化裂化方法,其中甲醇是与少量(催化剂/油0.01)的分散的,非常细的和高活性的催化剂粉末如ZSM-5B组合的助燃油的共反应物。 在与油混合之前,甲醇优选与催化剂混合,以便在反应的初始阶段保护催化剂免受有毒化合物(例如含氮化合物)的吸附,特别是如果甲醇不溶于非极性烃 饲料。 将预混材料进料到提升管反应器中。 反应器中的停留时间为6-15秒。 优选地,催化剂不再生。 维持甲醇的量,使其放热反应与吸热催化裂化反应近似热平衡。