Abstract:
The present application discloses a fluidized catalytic cracking process wherein light cycle gas oil is stripped of heavy naphtha components employing reboiled light cycle gas oil as stripping vapor. Heavy naphtha vapors stripped from the light cycle gas oil are returned to the reaction vapor as primary stripping vapor. This process results in increased naphtha octanes, and reduced sour water production from a fluidized catalytic cracking unit.
Abstract:
Separation of the catalyst-containing product effluent from a fluid catalytic cracking unit is effected in the main column by a technique which involves removing a light naphtha fraction as the single overhead stream and separately withdrawing a heavy naphtha fraction as a lower side-cut. The latter is stripped of light naphtha (for recycle to the main column) and recovered as a product stream. Preferably a portion of the heavy naphtha fraction (as withdrawn) is cooled and combined with the light naphtha overhead reflux stream.
Abstract:
A process for obtaining improved hydrocarbon oil products by treating by-product heavy fractions, formed in the production of olefins and having initial boiling point of above 160*C and a 75 percent distill-off point of below 450*C, with hydrogen at a temperature of from 40* to 200*C and a pressure of from 5 to 300 kg/cm2 G using a nickel-containing catalyst which has been pretreated with organic sulfur compounds, to thereby impart thermal stability to the oil, then subjecting the resulting oil to a hydrorefining followed by hydrogenation is disclosed.
Abstract:
HIGH QUALITY UV STABLE LUBRICATING OIL STOCKS ARE PREPARED BY SOLVENT EXTRACTING A HYDROCARBON FEEDSTOCK WITH A SOLVENT HAVING PREFERENTIAL SOLUBILITY FOR AROMATICS, THEREBY REDUCING THE AROMATIC CONTENT THEREOF AND RECOVERING A RAFFINATE PHASE THEREFROM. THE RAFFINATE IS STRIPPED OF SOLVENT AND SUBSEQUENTLY HYDROCRACKED MILD CONDITIONS TO INCREASE THE VISCOSITY INDEX OF THE RAFFINATE. THE HYDROCRACKATE PRODUCT IS THEN SOLVENT EXTRACTED WITH A SOLVENT HAVING PREFERENTIAL SOLUBILITY FOR AROMATICS, WHICH SOLVENT MAY BE THE SAME OR DIFFERENT THAN THE SOLVENT USED IN THE FIRST EXTRACTION, THEREBY FORMING A SECOND EXTRACT
PHASE AND A SECOND RAFFINATE PHASE. THE EXTACT AND RAFFINATE PHAESE ARE SEPARATED AND THE EXTRACT PHASE STRIPPED OF SOLVENT AND RECYCLED TO THE HYDROCRACKER .
Abstract:
In fluid catalytic riser cracking of a gas oil with a zeolite catalyst the inclusion of controlled amounts of residual oil in the feed results in an improvement in octane value and/or improvement in the distribution of octane value of the gasoline product. The octane number improvement is further enhanced by hydrodesulfurizing the residual oil prior to charging to the FCC unit. However, residual oil is relatively difficult to vaporize and the extent of its vaporization will depend on the equilibrium flash vaporization temperature at the bottom or inlet of the riser. Therefore, the quantity of residual oil in the feed must be controlled in relation to the equilibrium temperature in order to, on the one hand, vaporize and crack a sufficient quantity of residual oil to obtain the octane improvement effect, while, on the other hand, keeping the quantity of residual oil which remains unvaporized below a specified level.
Abstract:
A hydrocarbon hydroconversion process comprising contacting a hydrocarbon feedstock and hydrogen with a catalyst comprising an alumina-silica-magnesia matrix containing a hydrogenation component, and a crystalline zeolitic molecular sieve substantially free of hydrogenation components, said catalyst having a specific gravity less than about 1.8, preferably 1.1 to 1.8, in a reaction zone at hydrocarbon hydroconversion conditions; also, said catalyst.
Abstract:
COMPOSITE MOTOR FUELS OR GASOLINE, SUITABLE FOR USE AS A LEAD-FREE OR LOW-LEAD-CONTENT FUEL, ARE PROVIDED BY VARIOUS COMBINATIONS OF STEPS COMPRISING, IN DIFFERENT EMBODIMENTS, VARIOUS NOVEL COMBINATIONS OF STEPS COMPRISING CATALYTIC CRACKING, CATALYTIC REFORMING, AND SOLVENT EXTRACTION. IN SOME EMBODIMENTS, THE COMBINATION(S) INCLUDE ONE OR MORE ADDITIONAL STEPS SUCH AS HYDROCRACKING, ALKYLATION, AND DISPROPORTIONATION.
Abstract:
A sorting machine having a plurality of parallel rollers, all being supported by chain means, which form them into an endless belt and each supporting a plurality of spaced, double-conical sectional discs; guide rails for the discs for adjusting the positions of the discs along their rollers; slotted guide plate means connected with the rails for readjusting the positions of the rails, thereby to readjust the positions of the sectional discs. A plurality of sorting machines may be arranged in a row, each with means for providing a transition to the succeeding machine.
Abstract:
THE INVENTION RELATES TO A HYDROCRACKING ARRANGMENT. CRUDE OR RESIDUA FEEDBSTOCK IS IN A FIRST STAGE TREATED TO HYDROGENATE ITS NON-HYDROCARBON CONTENT USING A FLUIDISED CATALYST DESCENDING IN A MULTI-BED REACTOR IN COUNTERCURRENT TO FEED AND HYDROGEN. THE EFFLUENT FROMTHE FIRST REACTOR PASSES TO DISCARD HYDROCRACKER ALSO WITH DESCENDING FLUIDISED CATALYST AND ASCENDING FEED AND HYDROGEN, THE CATALYST BEING REGENERATED LOW ACTIVITY CATALYST FROM THE SUBSEQUENT MAIN HYDROCRACKING ZONE.
Abstract:
THE INVENTION RELATES TO THE PREPARATION OF LUBE OIL AND WAX FROM LOW VANADIUM CONTENT CRUDE OR RESIDUA FEED. THE FEED IS FIRST TREATED IN A CATALYST DISCARD ZONE HYDROCRACKER USING CATALYST PROVIDED BY REGNERATION OF LOW ACTIVITY CATALYST FROM A SUBSEQUENT MAIN HYDROCRACKING ZONE. THE DISCARD HYDROCRACKER COMPRISING A PLURALITY OF BEDS CONTAINING FLUIDISED CATALYST DESCENDING IN COUNTERCURRENT TO ASCENDING FEED AND HYDROGEN. CATALYST TRANSFER BETWEEN BEDS IS EXTERNAL OF THE REACTOR.