Production of fuel from renewable feedstocks using a finishing reactor
AssigneeUop LLC
InventorsPeter Kokayeff, Terry L. Marker, John A. Petri
Life of this patent
Estimating the term…
Abstract
A process has been developed for producing fuel from renewable feedstocks such as plant and animal oils and greases. The process involves treating a first portion of a renewable feedstock by hydrogenating and deoxygenating in a first reaction zone and a second portion of a renewable feedstock by hydrogenating and deoxygenating in a second reaction zone and treating the effluents in a finishing reaction zone to provide a diesel boiling point range fuel hydrocarbon product. If desired, the hydrocarbon product can be isomerized to improve cold flow properties. A portion of the hydrocarbon product is recycled to the first reaction zone to increase the hydrogen solubility of the reaction mixture.
Claims19
A process for producing a hydrocarbon product comprising paraffins from at least a first and a second portion of renewable feedstock said process comprising;
- a) treating the first portion of renewable feedstock in a first reaction zone by hydrogenating and deoxygenating the first portion of feedstock at reaction conditions to provide a first effluent comprising paraffins;
- b) passing at least a portion of the first effluent to a second reaction zone and treating the second portion of renewable feedstock in the second reaction zone by hydrogenating and deoxygenating the second portion of renewable feedstock at reaction conditions to provide a second effluent comprising paraffins;
- c) passing the second effluent comprising paraffins to a separation zone to separate a gaseous phase from a liquid phase;
- d) passing the liquid phase to a finishing reaction zone and treating the liquid phase by hydrogenating and deoxygenating the liquid phase at reaction conditions to provide a finishing reaction zone effluent, wherein the temperature or pressure or both are higher in the finishing reaction zone than in either the first or the second reaction zones;
- and
- e) recycling a recycle stream comprising a portion of at least one of the reaction zone effluents or a portion of the finishing reaction zone effluent to the first reaction zone wherein the volume ratio of recycle stream to first portion of renewable feedstock is in the range of about 2:1 to about 8:1.
Dependencies are inferred from the claim text.