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    • 9. 发明授权
    • Wax isomerization catalyst and method for its production
    • 蜡异构化催化剂及其生产方法
    • US4959337A
    • 1990-09-25
    • US283709
    • 1988-12-13
    • Ian A. CodyHamner, deceased Glen P.Willard H. SawyerWillard H. SawyerDavis S. Mark
    • Ian A. CodyHamner, deceased Glen P.Willard H. SawyerWillard H. SawyerDavis S. Mark
    • B01J23/40C10G45/62
    • C10G45/62B01J23/40
    • A wax isomerization catalyst is described which comprises a Group VIII hydrogenation metal component on fluorided alumina or material containing alumina which catalyst possesses a surface nitrogen content N/Al ratio of about 0.01 or less determined by X-ray photoelectron spectroscopy, a bulk fluorine content of between about 2 to 10 wt %, a surface fluorine content defined as the amount of fluorine in a layer extending from the outer surface to a depth of about 1/100 of an inch of less than about 3 wt % provided that the surface fluoride concentration is less than the bulk fluoride concentration and an aluminum fluoride hydroxide hydrate peak height of 60 or less determined as the relative amount of hydrate represented by a peak in the X-ray diffraction pattern at 2.theta.=5.66 .ANG. when a hydrate level of 100 corresponds to the XRD peak height exhibited by a standard material. Also described is a method for producing a slack wax isomerization catalyst said method comprising depositing a Group VIII hydrogenation metal on alumina or material containing alumina extrudate, calcining said metal loaded extrudate, fluoriding said material using an aqueous fluorine source solution having a pH of 3.5 to 4.5 to a bulk fluorine level of about 8 wt % or less followed by heating in an air oxygen containing atmosphere or inert gas from ambient to 350.degree. to 450.degree. C. within 3 hours and holding at the final temperature, if necessary, for a time sufficient to reduce the hydrate and nitrogen contents to the aforesaid levels. Alternatively the catalyst can be made using a fluorine solution of pH less than 3.5 to a bulk fluorine level of about 10 wt % or less followed by heating in air or an oxygen containing atmosphere, or inert atmosphere at about 350.degree. to 450.degree. C.
    • 描述了一种蜡异构化催化剂,其包括在氟化氧化铝上的VIII族加氢金属组分或含有氧化铝的材料,该催化剂具有通过X射线光电子能谱测定的表面氮含量N / Al比为约0.01以下,体积氟含量 在约2至10重量%之间,表面氟含量定义为从外表面延伸至约1/100英寸的深度小于约3重量%的层中的氟的量,条件是表面氟化物浓度 小于氟化物浓度,氟化氢氢氧化物水合物峰值高度为60或更小,当水合物水平为100时,在2θ= 5.66时X射线衍射图中由峰值表示的水合物的相对量确定为对应于 到标准材料表现出的XRD峰高。 还描述了一种制备松散蜡异构化催化剂的方法,所述方法包括在氧化铝上沉积VIII族氢化金属或含有氧化铝挤出物的材料,煅烧所述负载有金属的挤出物,使用pH为3.5的含氟氟源溶液氟化所述材料, 4.5至大约8重量%或更少的体积氟水平,然后在3小时内在空气含氧气氛或惰性气体中从室温加热至350℃至450℃,并在必要时保持在最终温度 时间足以将水合物和氮含量降低到上述水平。 或者,催化剂可以使用pH小于3.5的氟溶液至约10重量%或更少的体积氟水平制备,然后在空气或含氧气氛中或在约350-450℃的惰性气氛下加热。