Wax Oil Hydrocracking Method and System
First Claim
1. A wax oil hydrocracking method, comprising:
- (1) controlling wax oil as feedstock and a hydrogen-containing material flow to contact with a pre-hydrotreating catalyst under pre-hydrotreating conditions to obtain a pre-hydrotreated material flow;
(2) controlling the pre-hydrotreated material flow and a hydrogen-containing material flow to contact with a first hydrocracking catalyst to have a first hydrocracking reaction under first hydrocracking conditions to obtain a first hydrocracked material flow, and dividing the first hydrocracked material flow into two parts, i.e., a first hydrocracked material flow A and a first hydrocracked material flow B;
(3) controlling the first hydrocracked material flow B and a hydrogen-containing material flow to contact with a second hydrocracking catalyst to have a second hydrocracking reaction under second hydrocracking condition to obtain a second hydrocracked material flow, and then separating and fractionating the second hydrocracked material flow to obtain a hydrocracked tail oil product; and
(4) controlling the first hydrocracked material flow A, at least a part of the hydrocracked tail oil product, and a hydrogen-containing material flow to contact with a hydrogenation isocracking catalyst to have a hydrogenation isocracking reaction under hydrogenation isocracking conditions to obtain a hydrogenation isocracked material flow, and then separating and fractionating the hydrogenation isocracked material flow.
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Accused Products
Abstract
A method of wax oil hydrocracking includes the steps of pre-hydrotreating wax oil to obtain a pre-hydrotreated material flow; controlling the pre-hydrotreated material flow and a hydrogen-containing material flow to contact with a first hydrocracking catalyst to obtain a first hydrocracked material flow, and dividing the first hydrocracked material flow into a first hydrocracked material flow A and a first hydrocracked material flow B; controlling the flow B and a hydrogen-containing material flow to contact with a second hydrocracking catalyst to obtain a second hydrocracked material flow, and then separating and fractionating the second hydrocracked material flow to obtain a hydrocracked tail oil product; controlling the flow A, at least a part of the hydrocracked tail oil product, and a hydrogen-containing material flow to contact with a hydrogenation isocracking catalyst to obtain a hydrogenation isocracked material flow, and then separating and fractionating the obtained hydrogenation isocracked material flow.
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Citations
20 Claims
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1. A wax oil hydrocracking method, comprising:
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(1) controlling wax oil as feedstock and a hydrogen-containing material flow to contact with a pre-hydrotreating catalyst under pre-hydrotreating conditions to obtain a pre-hydrotreated material flow; (2) controlling the pre-hydrotreated material flow and a hydrogen-containing material flow to contact with a first hydrocracking catalyst to have a first hydrocracking reaction under first hydrocracking conditions to obtain a first hydrocracked material flow, and dividing the first hydrocracked material flow into two parts, i.e., a first hydrocracked material flow A and a first hydrocracked material flow B; (3) controlling the first hydrocracked material flow B and a hydrogen-containing material flow to contact with a second hydrocracking catalyst to have a second hydrocracking reaction under second hydrocracking condition to obtain a second hydrocracked material flow, and then separating and fractionating the second hydrocracked material flow to obtain a hydrocracked tail oil product; and (4) controlling the first hydrocracked material flow A, at least a part of the hydrocracked tail oil product, and a hydrogen-containing material flow to contact with a hydrogenation isocracking catalyst to have a hydrogenation isocracking reaction under hydrogenation isocracking conditions to obtain a hydrogenation isocracked material flow, and then separating and fractionating the hydrogenation isocracked material flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A wax oil hydrocracking system, comprising:
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a pre-hydrotreating unit (1); a first hydrocracking unit (2), in which a pre-hydrotreated material flow obtained from the pre-hydrotreating unit (1) is treated by first hydrocracking to obtain a first hydrocracked material flow; a second hydrocracking unit (3), in which a part of the first hydrocracked material flow is treated by second hydrocracking to obtain a second hydrocracked material flow; a hydrocracking separation unit, in which the second hydrocracked material flow is separated to obtain a hydrocracked hydrogen-rich gas, a hydrocracked gas product, and a hydrocracked liquid-phase material flow; a hydrocracking fractionation tower (5), in which the hydrocracked liquid-phase material flow is fractionated to obtain a hydrocracked tail oil product; a hydrogenation isocracking reactor (6), in which the remaining part of the first hydrocracked material flow and at least a part of the hydrocracked tail oil product are treated by hydrogenation isocracking to obtain a hydrogenation isocracked material flow; a hydrogenation isocracking separation unit, in which the hydrogenation isocracked material flow is separated to obtain a hydrogenation isocracked hydrogen-rich gas, a hydrogenation isocracked gas product, and a hydrogenation isocracked liquid-phase material flow; and a hydrogenation isocracking fractionation tower (8), in which the hydrogenation isocracked liquid-phase material flow is fractionated. - View Dependent Claims (17, 18, 19, 20)
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Specification