Process for refractory compound conversion in a hydrocracker rec

Details Process for refractory compound conversion in a hydrocracker rec Process for refractory compound conversion in a hydrocracker rec

1991-04-25

1992-08-18

Morris, Theodore

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208 58, 208 60, 208 99, 208102, C10G 4500, C10G 4700, C10G 6902, C10G 6706

Patent

active

051396440

ABSTRACT:
The present invention is a catalytic hydrocracking process which minimizes the fouling of the process unit with 11.sup.+ ring heavy polynuclear aromatic compounds by means of hydrogenating and converting at least a portion or slipstream of the hydrocarbon effluent from the hydrocracking zone containing trace quantities of 11.sup.+ ring heavy polynuclear aromatic compounds in a 11.sup.+ ring heavy polynuclear aromatic compound conversion zone containing a hydrogenation catalyst having a hydrogenation component at hydrogenation conditions to selectively reduce the concentration of 11.sup.+ ring heavy polynuclear aromatic compounds before the hydrocracking zone effluent is cooled below about 400.degree. F. At least a portion of the effluent from the 11.sup.+ ring heavy polynuclear aromatic compound conversion zone is cooled and separated to produce at least a portion of the unconverted recycle stream.

REFERENCES:
patent: 3172835 (1965-03-01), Scott, Jr.
patent: 3619407 (1971-09-01), Hendricks et al.
patent: 4447315 (1984-05-01), Lamb et al.
patent: 4618412 (1986-10-01), Hudson et al.
patent: 4698146 (1987-10-01), Gruia
patent: 4954242 (1990-09-01), Gruia

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