Method for converting a high-boiling hydrocarbon feedstock into lighter boiling hydrocarbon products
AssigneesSaudi Basic Industries Corporation, Sabic Global Technologies B.V.
InventorsArno Johannes Maria Oprins, Andrew Mark Ward, Ravichander Narayanaswamy
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Abstract
A process for converting high boiling hydrocarbon feedstock into lighter boiling hydrocarbon products in which the lighter boiling hydrocarbon products are suitable feedstock for petrochemical processes.
Claims10
A process for converting a high-boiling hydrocarbon feedstock into lighter-boiling hydrocarbon products, said lighter-hydrocarbon products being suitable as feedstocks for petrochemical processes, said converting process comprising:
- feeding a heavy hydrocarbon feedstock to a cascade of hydrocracking unit(s), wherein the cascade of hydrocracking units comprises at least two hydrocracking units, wherein on of the units is a last hydrocracking unit in said cascade of hydrocracking units;
- cracking said feedstock in the hydrocracking units;
- separating said cracked feedstock into at least a stream comprising a light-boiling hydrocarbon fraction and a bottom stream comprising a heavier hydrocarbon fraction than said light-boiling fraction;
- feeding said bottom stream of such a hydrocracking unit as a feedstock for a subsequent hydrocracking unit in said cascade of hydrocracking units, wherein process conditions in each hydrocracking unit are different from each other, in which temperature conditions from first to subsequent hydrocracking units increases, wherein a reactor type design of the last hydrocracking unit is of a slurry phase type;
- sending the light-boiling hydrocarbon fractions from each of said hydrocracking units to petrochemical processes, comprising at least a gas steam cracking unit, a propane dehydrogenation unit, and a butane dehydrogenation unit and one or more units chosen from a pentane dehydrogenation unit and a mixed propane-butane dehydrogenation unit;
- separating said light boiling hydrocarbon fractions into a stream comprising C2, a stream comprising C3 and a stream comprising C4;
- feeding said stream comprising C3 to the propane dehydrogenation unit;
- feeding said stream comprising C4 to the butane dehydrogenation unit;
- and
- feeding said stream comprising C2 to the gas steam cracker unit.
A process for converting a high-boiling hydrocarbon feedstock into lighter-boiling hydrocarbon products, said lighter-hydrocarbon products being suitable as feedstocks for petrochemical processes, said converting process comprising:
- feeding a heavy hydrocarbon feedstock to a cascade of hydrocracking unit(s),
- cracking said feedstock in the hydrocracking unit(s),
- separating said cracked feedstock into a stream comprising hydrogen, a stream comprising a light-boiling hydrocarbon fraction and a bottom stream comprising a heavier hydrocarbon fraction,
- feeding said bottom stream of such a hydrocracking unit as a feedstock for a subsequent hydrocracking unit in said cascade of hydrocracking units, wherein process conditions in each hydrocracking unit are different from each other, in which the hydrocracking conditions from the first to subsequent hydrocracking units increase from least severe to most severe, wherein a reactor type design of the last hydrocracking unit is of a slurry phase type, and
- sending the light-boiling hydrocarbon fractions from each of said hydrocracking units to petrochemical processes, comprising at least a gas steam cracking unit, a propane dehydrogenation unit, and a butane dehydrogenation unit and one or more units chosen from a pentane dehydrogenation unit and a mixed propane-butane dehydrogenation unit, wherein a catalyst is present in the cascade of hydrocracking units and a particle size of the catalyst present in the cascade of hydrocracking units decreases from the first hydrocracking unit to the subsequent hydrocracking unit.
Dependencies are inferred from the claim text.