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US 2022/0267150 A1Published application
Modified sulfuric acid and uses thereof
AssigneeSixring Inc.
InventorsClay PURDY, Markus WEISSENBERGER, Markus PAGELS, Kyle G. WYNNYK
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Abstract
An aqueous composition comprising: sulfuric acid; a modifying agent comprising an amine group; and a peroxide. Said composition being capable of delignifying biomass under milder conditions than conditions under which kraft pulping takes place.
Claims20
An aqueous acidic composition comprising:
- sulfuric acid;
- a modifying agent comprising a compound containing an amine group and
- a peroxide.
An aqueous composition for use in the processing and depolymerisation of cellulose from a plant source, wherein said composition comprises:
- sulfuric acid present in an amount ranging from 20-80 wt % of the total weight of the composition;
- a modifying agent comprising a compound containing an amine group;
- and
- a peroxide;
- wherein the sulfuric acid and the compound containing an amine group are present in a mole ratio ranging from 2:1 to 28:1.
2 more elements
A one-pot process to separate lignin from a lignocellulosic feedstock, said process comprising the steps of:
- providing a vessel;
- providing said lignocellulosic feedstock;
- providing a composition comprising;
- an acid;
- a modifying agent comprising a compound containing an amine group;
- and
- a peroxide;
- exposing said lignocellulosic feedstock to said composition in said vessel for a period of time sufficient to remove at least 80% of the lignin present said lignocellulosic feedstock;
- optionally, separating and removing a liquid phase comprising dissolved lignin fragments from a solid phase comprising cellulose fibres.
6 more elements
Dependencies are inferred from the claim text.