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US 2020/0263107 A1Published application
Lubricant base stock production from recycled oil
AssigneeExxonMobil Technology and Engineering Company
InventorsRichard C. Dougherty, Kristin L. Sanfilippo, Christine A. Zielinski, Charles L. Baker, JR.
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Abstract
Systems and methods are provided for co-processing of used lubricant oils with a coker feedstock in a fluidized coking process to form lubricant base stocks. The fluidized coking process can remove contaminants and/or additives from used lubricant oils with modest conversion of the lubricant boiling range portion.
Claims28
A method for producing a lubricant base oil product, comprising:
- exposing, in a reactor, a feed comprising:
- a) 0.5 wt % to 40 wt % of a used lubricant oil comprising a viscosity index of 70 or more, and
- b) a coker feedstock comprising a T10 distillation point of 450° C. or more, to a fluidized bed comprising solid particles under fluidized coking reactor conditions including a temperature of at least 510° C. to form a coker effluent, the fluidized coking conditions comprising 10 wt % or more conversion of the feedstock relative to 450° C., the fluidized coking conditions being effective for depositing coke on the solid particles;
- passing at least a portion of the solid particles comprising deposited coke from the reactor to the coke combustion stage;
- removing from the coke combustion stage a first portion of the partially combusted solid particles, a rate of removal of the partially combusted solid particles comprising 1.5% or more on a weight basis of a rate of introduction of the feed into the reactor;
- separating at least a coker gas oil product from the coker effluent;
- hydroprocessing at least a portion of the separated coker gas oil product under effective hydroprocessing conditions to produce a hydroprocessed coker gas oil having a sulfur content of 100 wppm or less.
4 more elements
An integrated system for producing lubricant oils from a coker effluent, comprising:
- a fluidized bed coker comprising one or more coker feed inlets, a cold particle outlet, at least one hot particle inlet, and a coker product outlet;
- a coke combustion reactor comprising:
- a coke combustion inlet in fluid communication with the cold particle outlet,
- a coke combustion outlet in fluid communication with the at least one hot particle inlet via at least one hot particle conduit,
- at least one coke combustion gas inlet,
- a particle purge outlet, and
- a fuel gas outlet;
- a first separation stage comprising a first separation stage inlet in fluid communication with the coker product outlet, a first separation stage heavy product outlet and a first separation stage light product outlet;
- one or more hydroprocessing stages comprising a hydroprocessing inlet in fluid communication with the first separation stage heavy product outlet and a hydroprocessing outlet.
6 more elements
Dependencies are inferred from the claim text.