Processes for converting biomass to BTX with low sulfur, nitrogen and olefin content via a catalytic fast pyrolysis process
AssigneeAnellotech, Inc.
InventorsCharles M. Sorensen, Jr., Ruozhi Song, Terry J. Mazanec
Life of this patent
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Abstract
Methods of separating and purifying products from the catalytic fast pyrolysis of biomass are described. In a preferred method, a portion of the products from a pyrolysis reactor are recovered and purified using a hydrotreating step that reduces the content of sulfur, nitrogen, and oxygen components, and hydrogenates olefins to produce aromatic products that meet commercial quality specifications.
Claims18
A method for producing aromatic chemicals from a product stream from a catalytic pyrolysis process, comprising:
- pyrolyzing solid biomass in the catalytic pyrolysis process to form a product stream;
- quenching the product stream to form a quenched product stream;
- separating catalyst, minerals, or char from the product stream and forming a separated, quenched product stream;
- separating a first liquid phase and a first vapor phase from the separated, quenched product stream;
- condensing the first vapor phase to produce a second liquid phase and a second vapor phase;
- separating the second liquid phase and the second vapor phase;
- contacting the second vapor phase with a contacting solvent to produce a third liquid phase and a third vapor phase, wherein the contacting solvent comprises a liquid stream recovered from the catalytic pyrolysis process;
- recovering aromatics from the second liquid phase and the third liquid phase;
- and
- hydrotreating at least a portion of the recovered aromatics to produce a hydrotreated aromatic stream.
A method for producing aromatic chemicals from a product stream from a catalytic pyrolysis process, comprising:
- pyrolyzing solid biomass in the catalytic pyrolysis process to form a product stream;
- quenching the product stream to form a quenched product stream;
- separating catalyst, minerals, or char from the product stream and forming a separated, quenched product stream;
- separating a first liquid phase and a first vapor phase from the separated, quenched product stream;
- condensing the first vapor phase to produce a second liquid phase and a second vapor phase;
- contacting the second liquid phase and the second vapor phase with a contacting solvent to produce a third liquid phase and a third vapor phase, wherein the contacting solvent comprises a liquid stream recovered from the catalytic pyrolysis process;
- recovering aromatics from the third liquid phase;
- and
- hydrotreating at least a portion of the recovered aromatics to produce a hydrotreated aromatic stream.
Dependencies are inferred from the claim text.