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TWO STAGE HYDROCRACKING PROCESS AND APPARATUS FOR MULTIPLE GRADE LUBE OIL BASE FEEDSTOCK PRODUCTION
TWO STAGE HYDROCRACKING PROCESS AND APPARATUS FOR MULTIPLE GRADE LUBE OIL BASE FEEDSTOCK PRODUCTION
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机译:两级加氢裂化工艺和装置,用于多级润滑油基础油的生产
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摘要
Multiple grades of lube oil base feedstock are produced within a two-stage hydrocracking unit. Effluent from a first hydrocracking zone is sent to a separation zone, which includes multiple separation vessels, and a heavy liquid stream enters one cell of a dual cell fractionator charge heater and is flashed in the distillation zone of a divided wall fractionation column. A portion of the bottom stream from one side of the divided wall column is sent to the second hydrocracking zone. Feed to a second cell of the dual cell fractionation column is derived from the effluent of this second hydrocracking zone. A different lube oil base feedstocks is derived from each of the cells of the dual cell fractionation column.
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