C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/95
C10G 11/16 (2006.01) B01J 29/06 (2006.01) B01J 29/90 (2006.01) C10G 11/18 (2006.01)
Patent
CA 1174998
-84- ADDITION OF MgC12 TO CATALYST Abstract A process for economically converting carbo-metallic oils to lighter products. The carbo-metallic oils contain 650°F and material which is characterized by a carbon resi- due on pyrolysis of at least about 1 and a Nickel Equiva- lents of heavy metals content of at least about 4 parts per million. This process comprises flowing the carbo-metallic oil together with particulate cracking catalyst through a progressive flow type reactor having an elongated reaction chamber, which is at least in part vertical or inclined, for a predetermined vapor riser residence time in the range of about 0.5 to about 10 seconds, at a 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 in the range of about 6 to about 14% by weight based on fresh feed, and lay- ins down coke on the catalyst in amounts in the range of about 0.3 to about 3% by weight. The spent, coke-laden cata- lyst from the stream of hydrocarbons formed by vaporized feed and resultant cracking products is separated and regenerated in one or more regeneration beds in one or more regeneration zones by burning the coke on the spent catalyst with oxygen. The bed density is in the range of about 25 to about 50 pounds per cubic foot and the bed or beds are sustained by fluidization gas containing combustion-supporting gas having a linear velocity in the range of about 0.2 to about 4 feet per second. MgC12 is added to the catalyst and is converted to MgO, which reduces sulfur oxide emissions, and a chlorine component, which reduces the CO2/CO ratio, thereby reducing the heat output of the regenerator. The catalyst particles are retained in the regeneration zone or zones in contact with the combustion-supporting gas for an average total residence time in said zone or zones of about 5 to about 30 minutes to reduce the level of carbon on the catalyst to -85- about 0.25% by weight or less. The regenerated catalyst is recycled to the reactor and contacted with fresh carbo- metallic oil.
398960
Ashland Oil Inc.
Gowling Lafleur Henderson Llp
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