Catalytic cracking with sulfur compound added to the feed

Details Catalytic cracking with sulfur compound added to the feed Catalytic cracking with sulfur compound added to the feed

1991-03-13

1992-11-03

Morris, Theodore

Mineral oils: processes and products

Refining

Metal contaminant removal

208 73, 208 88, 208 90, C10G 5500, C10G 5700

Patent

active

051606038

ABSTRACT:
A catalytic cracking process for heavy metals and asphaltene containing feed is disclosed. A reactive sulfur compound, preferably H.sub.2 S, is dissolved in the heavy feed and then kept at a temperature and for a time sufficient to at least partially decompose the metal containing compounds and also to reduce the molecular weight of the asphaltenes. Preferably a metal scavenging additive is added to the equilibrium catalyst. The additive will rapidly remove the thermal- and sulfur-treated metal containing compounds and prevent or minimize metals poisoning of the cracking catalyst. Sulfur induced cracking of heavy oil components reduces the viscosity of the heavy feed, and permits lower temperature to be used in the cracking reactor.

REFERENCES:
patent: 2902430 (1959-09-01), Kimberlin, Jr. et al.
patent: 4233138 (1980-11-01), Rollmann et al.
patent: 4256567 (1981-03-01), Bartholic
patent: 4377469 (1983-03-01), Shihabi
patent: 4430206 (1984-02-01), Rankel
patent: 4895636 (1990-01-01), Chen et al.
patent: 4988434 (1991-01-01), Aldridge et al.
"Degradation of Metalloporphyrins in heavy oils before and during Processing", Lillian A. Rankel, 1987, American Chemical Society, Chapter 16, pp. 257-264.

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