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US 9,809,867 B2Granted
Carbon purification of concentrated sugar streams derived from pretreated biomass
AssigneeSweetwater Energy, Inc.
InventorsSarad Parekh, Carl P. Felice
Life of this patent
Estimating the term…
Abstract
Provided are methods and compositions using activated carbon for optimizing purification and clarification of sugar streams produced from cellulosic or lignocellulosic biomass. Also provided are methods and compositions for decreasing one or more undesirable products during pretreatment.
Claims18
A method of refining a sugar stream, the method comprising:
- (a) acidifying the sugar stream to a pH of from about 1 to about 4 by adding an acid to produce an acidified sugar stream;
- (b) heating activated carbon to a temperature of from about 100°C. to about 300°C. to produce heat activated carbon;
- and
- (c) contacting the acidified sugar stream with the heat activated carbon for a sufficient time to produce a refined sugar stream.
1 more element
A method of refining a sugar stream, the method comprising:
- (a) heating activated carbon to a temperature of from about 100° C. to about 300° C. to produce heat activated carbon;
- (b) contacting the sugar stream with the heat activated carbon for a sufficient time to produce a refined sugar stream, wherein the heat activated carbon is at a temperature greater than the sugar stream.
Dependencies are inferred from the claim text.