US 9,809,867 B2
Carbon purification of concentrated sugar streams derived from pretreated biomass
Sarad Parekh, Pittsford, NY (US); and Carl P. Felice, Churchville, NY (US)
Assigned to SWEETWATER ENERGY, INC., Rochester, NY (US)
Appl. No. 14/776,411
Filed by SWEETWATER ENERGY, INC., Rochester, NY (US)
PCT Filed Mar. 14, 2014, PCT No. PCT/US2014/027850
§ 371(c)(1), (2) Date Sep. 14, 2015,
PCT Pub. No. WO2014/143753, PCT Pub. Date Sep. 18, 2014.
Claims priority of provisional application 61/800,001, filed on Mar. 15, 2013.
Prior Publication US 2016/0032414 A1, Feb. 4, 2016
Int. Cl. C13K 1/04 (2006.01); C13K 13/00 (2006.01); C12P 19/02 (2006.01)
CPC C13K 1/04 (2013.01) [C12P 19/02 (2013.01); C13K 13/002 (2013.01); C13K 13/007 (2013.01); C12P 2203/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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.