초록 ▼

A method is disclosed for cracking a carbo-metallic oil feed containing high amounts of coke forming carbonaceous materials as characterized by a Conradson carbon value of more than 1 and containing a level of nickel and/or vanadium of greater than 5 ppm. The method includes contacting the feed with

A method is disclosed for cracking a carbo-metallic oil feed containing high amounts of coke forming carbonaceous materials as characterized by a Conradson carbon value of more than 1 and containing a level of nickel and/or vanadium of greater than 5 ppm. The method includes contacting the feed with catalyst particles and liquid water containing hydrogen sulfide. At least a portion of the water may be recycled water from prior catalytic cracking of an oil feed containing sulfur.

대표청구항 ▼

A process for economically converting carbo-metallic oils to lighter products, comprising: I. providing a converter feed containing 650°F.+material, said 650°F.+material being characterized by a carbon residue on pyrolysis of at least about 1 and by containing at least about 5 parts per million of n

A process for economically converting carbo-metallic oils to lighter products, comprising: I. providing a converter feed containing 650°F.+material, said 650°F.+material being characterized by a carbon residue on pyrolysis of at least about 1 and by containing at least about 5 parts per million of nickel and vanadium combined; II. bringing said converter feed together with cracking catalyst having an equilibrium microactivity test conversion activity level of at least about 40 and bearing an accumulation of at least about 1,000 ppm combined of nickel and vanadium expressed as weight of metal(s) on regenerated equilibrium catalyst; III. bringing said converter feed together with liquid water in a weight ratio relative to feed in the range of about 0.04 to about 0.15, said liquid water containing at least 100 ppm hydrogen sulfide, less than 100 ppm sodium and less than 500 ppm each of calcium and magnesium; IV. forming a stream containing a mixture of said converter feed, said catalyst and steam resulting from the vaporization of said liquid water and causing the resultant stream to flow through a progressive flow type reactor having an elongated reaction chamber which is at least in part vertical or inclined for a vapor residence time in the range of about 0.5 to about 10 seconds at a reaction chamber outlet temperature of about 900°to about 1400°F. and under a pressure of about 10 to about 50 pounds per square inch absolute sufficient for causing a conversion per pass in the range of about 50% to about 90% while producing coke in amounts greater than about 6% by weight based on fresh feed, and laying down coke on the catalyst in amounts greater than about 0.3 percent by weight based on catalyst; V. separating said catalyst from the resultant cracking products; VI. stripping said separated catalyst; VII. regenerating said catalyst; and, VIII. recycling the regenerated catalyst to the reactor for contact with fresh feed.