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US 2023/0382852 A1Published application
Modified sulfuric acid and uses thereof
AssigneeSixring Inc.
InventorsClay PURDY, Markus WEISSENBERGER, Kyle G. WYNNYK, Karl W. DAWSON
Life of this patent
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Abstract
An aqueous composition comprising: sulfuric acid; a compound comprising an amine moiety; a compound comprising a sulfonic acid moiety; and a peroxide. Said composition being capable of delignifying biomass.
Claims15
1-16. (canceled)
A method of delignifying plant material, said method comprising:
- providing said plant material comprising cellulose fibers and lignin;
- exposing said plant material to a composition comprising:
- sulfuric acid;
- a compound comprising an amine moiety;
- a compound comprising a sulfonic acid moiety;
- and
- a peroxide;
- wherein said composition has a pH of less than, and
- wherein said sulfuric acid, said compound comprising an amine moiety, and said compound comprising a sulfonic acid moiety are present in the composition in a molar ratio ranging from 28:1:1 to 2:1:1,
- for a period of time sufficient to remove substantially all lignin present on said plant material.
7 more elements
20-21. (canceled)
Dependencies are inferred from the claim text.