Catalytic cracking process
AssigneeStandard Oil Company (Indiana)
InventorsFrank William Hauschildt, Ralph J. Bertolacini
Life of this patent
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Abstract
A method for catalytically cracking an isolated reactant feed, 80-100 volume percent of which is a substantially mono-aromatic hydrocarbon fraction boiling in the boiling range of heavy gasoline and the remainder of which is a vaporizable hydrocarbon fraction, under effective cracking conditions of cracking temperature, catalyst composition, catalyst activity, catalyst-to-feed weight ratio, and weight hourly space velocity, to produce an isolated product having increased low molecular weight olefin and low molecular weight mono-aromatic contents and a reduced sulfur content and having a high octane rating.
Claims21
A process for converting an intermediate boiling-range hydrocarbon fraction to more valuable products by fluid catalytic cracking which comprises:
- a. fractionating a catalytic cracking product to separate therefrom a hydrocarbon fraction consisting of at least 40 weight percent of mono-aromatic hydrocarbons and boiling in the range from about 230.degree. F. to about 500.degree. F.,
- b. preparing an isolated feed, 80 to 100 volume percent of which is the fraction from step (a) and the remainder of which is a vaporizable hydrocarbon fraction;
- c. catalytically cracking said isolated feed in a fluidized catalytic cracking zone under effective cracking conditions in the presence of a molecular sieve-type cracking catalyst having an equilibrium cracking activity of at least about 55 units on the Davision microactivity scale to produce an isolated hydrocarbon product;
- and
- d. recovering said isolated hydrocarbon product from the cracking zone, said isolated hydrocarbon product having increased low molecular weight olefin and low molecular weight mono-aromatic contents, a substantially reduced sulfur content, and a high octane rating relative to said isolated feed.
Dependencies are inferred from the claim text.