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AssigneeMobil Oil Corporation
InventorsQuang N. Le, Robert T. Thomson, Grant H. Yokomizo
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A process for upgrading aliphatic feedstocks containing lower olefins employing new synthetic catalyst of ultra-large pore crystalline material. The new crystalline material exhibits unusually large sorption capacity demonstrated by its benzene adsorption capacity of greater than about 15 grams benzene/100 grams at 50 torr and 25.degree. C., a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 Angstrom Units and a hexagonal arrangement of uniformly sized pores with a maximum perpendicular cross section of at least about 13 Angstrom units. A new process is provied for catalytic oligomerization of lower olefin component in paraffin-containing mixed aliphatic feedstock which comprises contacting the feedstock under catalytic conversion conditions with acid metallosilicate solid catalyst having the structure of MCM-41 with hexagonal honeycomb lattice structure consisting essentially of uniform pores in the range of about 20 to 100 Angstroms. The oligomerization reaction is very selective, especially when conducted at temperature of about 40.degree. to 250.degree. C., yielding branched intermediate olefins. Low severity reaction permits execellent conversion of lower olefins at pressure of about 100-13,000 pKa range and moderate space velocity. Oligomers of propene produced over MCM-41, when reacted under cracking/disproportionation conditions yield a propylene-rich mixture which is separated as a C.sub.3 stream, and C.sub.6 + isoalkenes are recovered in good yield.
An improved process for upgrading a mixed C.sub.3 -C.sub.5 aliphatic feedstock containing lower alkane and alkene components by selectively oligomerizing the lower alkene component by contacting the feedstock with acid porous solid catalyst under selective oligomerization conditions to produce heavier alkene oligomer in the substantial absence of product lower in molecular weight than dimer material;
A process for upgrading a mixed C.sub.3 -C.sub.5 aliphatic feedstock containing lower alkane and alkene components by selectively oligomerizing the lower alkene component, which comprises contacting said feedstock under catalytic conversion conditions with acid metallosilicate solid catalyst having the structure of MCM-41 with hexagonal honeycomb lattice structure consisting essentially of uniform pores in the range of about 20 to 100 Angstroms.
A process for catalytic oligomerization of lower olefin in admixture with at least one paraffin of corresponding carbon number which comprises contacting said feedstock under catalytic olefin oligomerization conditions with inorganic, porous, non-layered crystalline phase catalyst material exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 Angstrom units and having a benzene adsorption capacity greater than 15 grams of benzene per 100 grams of said material at 50 torr and 25.degree. C.;
A process for catalytic oligomerization of lower olefin component in paraffin- containing mixed aliphatic feedstock which comprises contacting the feedstock under catalytic oligomerization reaction conditions at moderate temperature with acid metallosilicate solid catalyst having the structure of MCM-41 with hexagonal honeycomb lattice structure consisting essentially of uniform pores in the range of about 20 to 100 Angstroms.
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