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US 8,894,818 B2Granted
Process for generating a hydrocarbon feedstock lignin
AssigneeChevron U.S.A. Inc.
InventorsWilliam Lawrence Schinski, Alexander E. Kuperman, Jinyi Han, Douglas Gene Naae
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Abstract
The present invention discloses processes for generating a hydrocarbon feedstock for biofuels synthesis from lignin via hydroprocessing. Embodiments of the present invention can occur in a refinery setting or in a paper mill setting. Embodiments of the present invention can utilize the separated lignin or the entire black liquor solution.
Claims20
A refinery process comprising:
- hydroprocessing refinery residuals and a lignin-containing feedstock to yield a biofuels feedstock, wherein the lignin-containing feedstock comprises lignin with phenolic polymers separated from black liquor from a pulping process wherein the lignin is separated from the black liquor from the pulping process by gaseous carbon dioxide (CO2) injection, and wherein the biofuels feedstock has been reduced in oxygen content and average molecular weight relative to the lignin as a result of hydroprocessing of the lignin contained therein.
A refinery process comprising:
- hydroprocessing a lignin-containing feedstock to yield a biofuels feedstock, wherein the lignin-containing feedstock comprises spent cooking liquor with caustic salts and lignin with phenolic polymers, wherein the biofuels feedstock has been reduced in oxygen content and average molecular weight relative to the lignin as a result of hydroprocessing of the lignin contained therein, wherein the hydroprocessing efflux water contains the caustic salts from the spent cooking liquor, and wherein the lignin in the lignin-containing feedstock is not chemically modified prior to hydroprocessing.
A method of producing a reduced oxygen content biofuel feedstock from black liquor comprising:
- receiving black liquor comprising lignin with phenolic polymers and inorganic salts;
- separating the lignin from the inorganic salts;
- hydroprocessing the separated lignin with phenolic polymers in a hydroprocessor to yield a reduced oxygen content biofuel feedstock, wherein the separated lignin is not chemically modified prior to hydroprocessing;
- and
- introducing the biofuel feedstock into a refinery for biofuels synthesis, wherein the biofuels feedstock is introduced into the refinery in combination with other refinery streams.
2 more elements
Dependencies are inferred from the claim text.