1. (19) United States
(12) PatentApplication Publication (10) pub. NO.: US 201110129889A1
Inamdar et al. (43) Pub. Date: Jun. 2,2011
(54) PROCESS FOR PRODUCTION OF ETHANOL (86) PCT No.: PCT/IN09/00410
FROM LIGNOCELLULOSIC MATERIAL
(75) Inventors: ShashankNaravan Inamdar,
9 371 (c)(l),
(2),(4) Date: Jan. 20,2011
,
Maharashtra ('IN;; Venkata (30) Foreign Application Priority Data- - -
~amakrishnasbnti, Maharashtra
...........................(IN);Ravikumar Rao, Maharashtra Jul.21, 2008 (IN) 878/MUM/2008
...................(IN);Milind Shrikant Kulkarni, Jul.20, 2009 (IN) PCT/IN2009/000410
Maharashtra (IN); Prasad Rao,
Maharashtra (IN); Mohan Babu,
Maharashtra ON); Satyendra
Waman Joshi, Maharashtra (IN);
Anilkumar Subhash Lokare,
Maharashtra (IN); Prashant
Prakash Gokhale, Maharashtra
(IN);Ashvini Monish Shete,
Maharashtra (IN); Gunjan
Nabakumar Mukharjee,
Maharashtra (IN)
(73) Assignee: PRAJ INDUSTRIES LIMITED,
Maharashtra (IN)
(21) Appl.No.: 131055,119
(22) PCT Filed: Jul. 20,2009
Publication Classification
(51) Int. C1.
C12P 7/10 (2006.01)
(52) U.S. C1. ........................................................ 4351165
(57) ABSTRACT
This inventionrelates to a process for production of ethanol
fiom lignocellulosic material. Lignocellulosic material
treated with a dicarboxylicacid,preferably withoxalic acid,
separatingahemicellulosicfractiontofermentpentose sugar.
Theligninisdissolvedinalkali,preferablywithNaOH, sepa-
rating a cellulose fraction for further enzymatic treatment
with one or more than one cellulytic enzymes capable of
hydrolyzing cellulose. The enzyme hydrolyasate is further
subjectedto fermentationinthe presenceof ethanol-produc-
ing yeast, preferably Sacchoromyces cerevisiae. The fer-
mented broth is further subjected to distillationfollowedby
dehydrationto yield ethanol.
Process l k w dhgrrm for pmductioouf ethanol ImmL!+joorellmlcuicfedstock
Fuel ethanol
&