Conversion of LPG hydrocarbons to distillate fuels or lubes using integration of LPG dehydrogenation and MOGDL

A method for converting olefins by catalytic oligomerization to produce distillates and lubes which comprise the steps of:

• (a) passing a paraffinic feed stream into a dehydrogenation zone at conditions of pressure and temperature which favor conversion of paraffins to an olefin rich effluent stream comprising at least one of the group consisting of propylene and butylene;
• (b) contacting said olefin rich effluent stream in a first catalytic reactor zone with a crystalline zeolite oligomerization catalyst at conditions of pressure and temperature which favor conversion of olefins to a first reactor effluent stream rich in olefinic gasoline;
• (c) separating said first reactor effluent stream in a first separation zone to form a C.sub.5.sup.+ rich stream and a C.sub.4.sup.- rich stream;
• (d) passing said C.sub.5.sup.+ rich stream to a second catalytic reactor zone;
• (e) contacting said C.sub.5.sup.+ rich stream in said second catalytic reactor zone with a crystalline zeolite oligomerization catalyst at temperature and pressure conditions which favor production of a second reactor effluent stream which is rich in distillate;
• (f) separating the second reactor effluent stream in a second separation zone to recover a olefinic gasoline stream and a distillate stream;
• and
• (g) contacting said distillate stream with hydrogen in a hydrotreating unit to produce a hydrotreated distillate stream comprising lube range hydrocarbons.