公开(公告)号：US5976351A

公开(公告)日：1999-11-02

申请号：US623036

申请日：1996-03-28

申请人： Minas Robert Apelian ,  William S. Borghard ,  Thomas Francis Degnan, Jr. ,  Robert Tryon Hanlon ,  Mae Koenig Rubin

发明人： Minas Robert Apelian ,  William S. Borghard ,  Thomas Francis Degnan, Jr. ,  Robert Tryon Hanlon ,  Mae Koenig Rubin

IPC分类号： C10G45/64 ,  C10G65/04 ,  C10G65/12

CPC分类号： C10G45/64 ,  C10G2400/10

摘要： This invention discloses a process for producing a high Viscosity Index lubricant having a VI of at least 125 from a waxy hydrocarbon feed having a wax content of at least 40 wt %. The process comprises catalytically dewaxing waxy paraffins present in the feed by isomerization in the presence of hydrogen and in the presence of a low acidity large pore zeolite isomerization catalyst. This catalyst has a ratio of SiO.sub.2 /Al.sub.2 O.sub.3, as synthesized, of at least 50:1, and an alpha value of not greater than 20, wherein the catalyst is prepared in the absence of boron. The catalyst further comprises a noble metal hydrogenation component. The feed may be hydrocracked prior to dewaxing with the large pore zeolite. The feed may be solvent dewaxed prior to isomerization. The effluent of the isomerization step may also be further dewaxed by either solvent or catalytic means in order to achieve target pour point.

摘要翻译： 本发明公开了一种由具有至少40重量％蜡含量的蜡质烃原料生产VI至少为125的高粘度指数润滑剂的方法。 该方法包括通过异构化在氢气存在下和在低酸性大孔沸石异构化催化剂的存在下将存在于进料中的蜡状链烷烃催化脱蜡。 该催化剂具有至少50:1的合成的SiO 2 / Al 2 O 3和不大于20的α值，其中催化剂在不存在硼的情况下制备。 催化剂还包含贵金属氢化组分。 在用大孔沸石脱蜡之前，可以将进料加氢裂化。 进料可以在异构化之前进行溶剂脱蜡。 异构化步骤的流出物还可以通过溶剂或催化方法进一步脱蜡，以达到目标倾点。