Single-stage hydrotreating process for converting pitch to conve

Details Single-stage hydrotreating process for converting pitch to conve Single-stage hydrotreating process for converting pitch to conve

1984-11-30

1985-08-13

Gantz, D. E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208210, 208251H, C10G 4506

Patent

active

045348529

ABSTRACT:
A process is provided for converting pitch-containing residual hydrocarbon oils containing asphaltenes, sulfur and nitrogen compounds and heavy metals into distillate fuels, which comprises: mixing from about 5-60% v residual oils with catalytic cracking feedstock and with hydrogen and passing said mixture downwardly into a hydrotreating zone over a stackedbed catalyst under conditions suitable to convert from about 45-75% of the sulfur compounds present in the mixture to H.sub.2 S; wherein said stacked bed comprises an upper bed consisting of from about 15-85 % v, basis total catalyst, of a high-activity hydrotreating catalyst which contains from about 2-4% w nickel, from about 8-15% w molybdenum and from about 2-4% w phosphorus supported on a carrier consisting mostly of alumina, and a lower bed of a high-activity, hydrodesulfurization catalyst consisting of from about 2-4% w cobalt and/or nickel, from about 8-15% w molybdenum and less than about 0.5% w phosphorus supported on a carrier consisting mostly of alumina; and separating the reaction product from said hydrotreating zone into a hydrogen-rich gas and a liquid residue-containing oil having reduced heavy metal content and being suitable as a catalytic cracking feedstock.

REFERENCES:
patent: 3392112 (1968-07-01), Bercik et al.
patent: 4006076 (1977-02-01), Christensen et al.
patent: 4392945 (1983-07-01), Howard et al.
patent: 4431526 (1984-02-01), Simpson et al.
patent: 4444655 (1984-04-01), Shiroto et al.

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