Catalytic reforming process

Details Catalytic reforming process Catalytic reforming process

1982-09-24

1983-11-15

Davis, Curtis R.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

C10G 3506

Patent

active

044154356

ABSTRACT:
A process for the optomization of the amount of sulfur introduced into a cyclic, or semi-cyclic reforming unit consistant with the dual objective of sulfiding a sulfur-sensitive polymetallic platinum catalyst, and minimizing the average sulfur present in the unit during an operating cycle. In accordance with such process, a sulfur-containing naphtha feed between reactor swings is first hydrofined to reduce the sulfur content of the feed, the product therefrom is then passed through a guard bed or reactor and contacted with a sulfur adsorbent essentially completely remove the feed sulfur to maximize catalyst activity, catalyst stability and C.sub.5.sup.+ liquid yield. At the time of, or just prior to, swinging on-stream a reactor which contains an unsulfided fresh, or unsulfided regenerated, reactivated sulfur-sensitive polymetallic platinum catalyst, the series of reactors is by-passed around the hydrofiner and guard chamber and the product from the hydrofiner fed directly into the series of reactors to sulfide the catalyst.

REFERENCES:
patent: 4166024 (1979-08-01), Swan
patent: 4348271 (1982-09-01), Swan
patent: 4354925 (1982-10-01), Schorfheide

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