Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment
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United States of America
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app pub date -
Mar 16, 2016
filing date -
Mar 16, 2016
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Abstract
Provided herein is a process for producing one or more products from a lignocellulosic feedstock. The process comprises treating the lignocellulosic feedstock by contacting the feedstock at least sulfur dioxide, sulfurous acid, or a combination thereof to produce a pretreated feedstock comprising one or more sulfonic acids. A process stream comprising one or more sulfonic acids is subsequently treated in a wet oxidation step to produce a stream comprising at least soluble oxidized phenolic compounds. The soluble oxidized phenolic compounds are then fed to an anaerobic digestion to produce methane. Optionally, hydrogen sulfide is produced during the anaerobic digestion. The hydrogen sulfide may then be converted to an acid selected from sulfur dioxide, sulfurous acid or a combination thereof in one or more steps. The acid may then be re-used in treatment as desired.
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International Classification(s)
- C01C:AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C05F:ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05....
- C08H:DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C07G:COMPOUNDS OF UNKNOWN CONSTITUTION
- C12P:FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESI....
- C05D:INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C....
- C05C:NITROGENOUS FERTILISERS
- C10L:FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYN....
- C12F:RECOVERY OF BY- PRODUCTS OF FERMENTED SOLUTIONS; D....
- C01D:COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, ....
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