Block processing configurations for base stock production from deasphalted oil

A method for making lubricant base stock, comprising:

• performing solvent deasphalting using a C4+ solvent under effective solvent deasphalting conditions on a feedstock having a T5 boiling point of at least about 370° C., the effective solvent deasphalting conditions producing a yield of deasphalted oil of at least about 50 wt % of the feedstock;
• hydroprocessing at least a portion of the deasphalted oil under first effective hydroprocessing conditions comprising first hydrocracking conditions to form a hydroprocessed effluent, the at least a portion of the deasphalted oil having an aromatics content of at least about 50 wt %, the hydroprocessed effluent comprising a sulfur content of 300 wppm or less, a nitrogen content of 100 wppm or less, or a combination thereof;
• separating the hydroprocessed effluent to form at least a fuels boiling range fraction, a first fraction having a T5 distillation point of at least 370° C., and a second fraction having a T5 distillation point of at least 370° C., the second fraction having a higher kinematic viscosity at 100° C. than the first fraction;
• hydroprocessing at least a portion of the first fraction under second effective hydroprocessing conditions, the second effective hydroprocessing conditions comprising second aromatic saturation conditions and second catalytic dewaxing conditions, to form a first catalytically dewaxed effluent comprising a 370° C.+ portion having a first kinematic viscosity at 100° C., the at least a portion of the first fraction being exposed to the second aromatic saturation conditions prior to the second catalytic dewaxing conditions;
• and
• hydroprocessing at least a portion of the second fraction under third effective hydroprocessing conditions, the third effective hydroprocessing conditions comprising third aromatic saturation conditions and third catalytic dewaxing conditions, to form a second catalytically dewaxed effluent comprising a 370° C.+ portion having a second kinematic viscosity at 100° C. that is greater than the first kinematic viscosity at 100° C., the at least a portion of the second fraction being exposed to the third aromatic saturation conditions prior to the third catalytic dewaxing conditions,
• wherein the second effective hydroprocessing conditions are different from the third effective hydroprocessing conditions.

A method for making lubricant base stock, comprising:

• performing solvent deasphalting using a C4+ solvent under effective solvent deasphalting conditions on a feedstock having a T5 boiling point of at least about 370° C., the effective solvent deasphalting conditions producing a yield of deasphalted oil of at least about 50 wt % of the feedstock;
• hydroprocessing at least a portion of the deasphalted oil under first effective hydroprocessing conditions comprising first hydrocracking conditions to form a hydroprocessed effluent, the at least a portion of the deasphalted oil having an aromatics content of at least about 50 wt %;
• separating the hydroprocessed effluent to form at least a fuels boiling range fraction, a first fraction having a Ts distillation point of at least 370° C., and a second fraction having a Ts distillation point of at least 370° C., the second fraction having a higher kinematic viscosity at 100° C. than the first fraction;
• hydroprocessing at least a portion of the first fraction under second effective hydroprocessing conditions, the second effective hydroprocessing conditions comprising exposing the first fraction to a medium pore dewaxing catalyst to form a first catalytically dewaxed effluent comprising a 370° C.+ portion having a first kinematic viscosity at 100° C.;
• and
• hydroprocessing at least a portion of the second fraction under third effective hydroprocessing conditions, the third effective hydroprocessing conditions comprising exposing the second fraction to the medium pore dewaxing catalyst to form a second catalytically dewaxed effluent comprising a 370° C.+ portion having a second kinematic viscosity at 100° C. that is greater than the first kinematic viscosity at 100° C.,
• wherein the second effective hydroprocessing conditions are different from the third effective hydroprocessing conditions.