Hydrogenation process

Abstract

A hydrocarbon hydrogenation process and a catalytic composition having hydrogenation functionality. The catalytic composition includes at least two noble metals supported on an inorganic, porous crystalline phase support material having pores with diameters of at least about 13 Angstrom Units and exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 Å with a relative intensity of 100, and having a benzene sorption capacity greater than about 15 grams benzene per 100 grams of the support material at 50 torr and 25° C. The noble metals are selected from the group consisting of Pd, Pt, Rh and lr and the crystalline material is a metallosilicate or an aluminosilicate. The hydrocarbon hydrogenation process includes contacting a hydrocarbon feedstock containing aromatics, olefins, or aromatics and olefins with the catalytic composition under superatmospheric conditions; wherein the concentration of the aromatics, olefins or aromatics and olefins in the product is reduced.

1 . A hydrocarbon hydrogenation process comprising contacting a hydrocarbon feedstock containing aromatics, olefins, or aromatics and olefins with a catalyst under superatmospheric conditions; wherein the concentration of said aromatics, olefins or aromatics and olefins in the product is reduced in relation to the concentration in the feedstock; and wherein said catalyst comprises two noble metals and is supported on a support material comprising an inorganic, porous crystalline phase material having pores with diameters of at least about 13 Angstrom Units and exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 Å with a relative intensity of 100, and having a benzene sorption capacity greater than about 15 grams benzene per 100 grams of said material at 50 torr and 25° C.  
     
     
         2 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said noble metals are selected from the group consisting of Pd, Pt, Rh and Ir.  
     
     
         3 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said crystalline phase material is a metallosilicate or an aluminosilicate.  
     
     
         4 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said catalyst includes at least 0.1 weight percent of said noble metals.  
     
     
         5 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said crystalline phase material exhibits, after calcination, a hexagonal arrangement of uniformly sized pores with diameters of at least about 13 Å and a hexagonal electron diffraction pattern that can be indexed with a d 1˜  value greater than about 18 Angstrom Units.  
     
     
         6 . The hydrocarbon hydrogenation process according to  claim 2 , wherein said crystalline phase material has an X-ray diffraction pattern following calcination with at least one peak whose d-spacing corresponds to the d 100  value from the electron diffraction pattern.  
     
     
         7 . The hydrocarbon hydrogenation process according to  claim 2 , wherein said noble metals are bound in a refractory inorganic oxide, wherein said refractory inorganic oxide is selected from the group consisting of alumina, silica, silica-alumina, titania, zirconia, magnesia and combinations thereof.  
     
     
         8 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said feedstock is a diesel fuel boiling range hydrocarbon and said support material is M41S.  
     
     
         9 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said catalyst is PtPd/M41S or PtPd/MCM-41.  
     
     
         10 . The hydrocarbon hydrogenation process according to  claim 1 , wherein said feedstock is a jet or diesel fuel boiling range hydrocarbon.