Production of olefins
AssigneeFina Research, S.A.
InventorsJean-Pierre Dath, Walter Vermeiren
Life of this patent
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Abstract
A process for cracking an olefin-rich hydrocarbon feedstock which is selective towards propylene in the effluent, the process comprising contacting a hydrocarbon feedstock containing one or more olefinic components of C4 or greater with a crystalline silicate catalyst to produce an effluent having a second composition of one or more olefinic components of C3 or greater, the feedstock and the effluent having substantially the same olefin content by weight therein characterized in that ethylene is added to the feedstock before the feedstock contacts the catalyst.
Claims20
A process for cracking an olefin-rich hydrocarbon feedstock which is selective towards propylene in the effluent, the process comprising contacting a hydrocarbon feedstock containing one or more olefinic components of C4 or greater with a crystalline silicate catalyst to produce an effluent having a second composition of one or more olefinic components of C3 or greater, the feedstock and the effluent having substantially the same olefin content by weight therein whereby ethylene is added to the feedstock before the feedstock contacts the catalyst.
A process for cracking an olefin-rich hydrocarbon feedstock which is selective towards propylene in the effluent, the process comprising contacting a hydrocarbon feedstock containing one or more olefinic components of C4 or greater with a crystalline silicate catalyst having a silicon/aluminium atomic ratio of at least 180 at an inlet temperature of from 500 to 600° C., an olefin partial pressure of from 0.1 to 2 bar and an LHSV of from 10 to 30 h−1, to produce an effluent having a second composition of one or more olefinic components of C3 or greater, the feedstock and the effluent having substantially the same olefin content by weight therein and ethylene recycled from the effluent is added to the feedstock before the feedstock contacts the catalyst.
Dependencies are inferred from the claim text.