Title:
METHOD FOR PRODUCING ETHANOL USING CELLULOSIC BIOMASS AS STARTING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/046623
Kind Code:
A1
Abstract:
This method for producing ethanol involves: a first saccharification/dissolution step for saccharifying and dissolving the hemicellulose contained in a cellulosic biomass into a C5 saccharide by subjecting a slurry of the cellulosic biomass, in which the pH is adjusted to a value between 1.0 and 3.5 by adding strong acid, to hot water treatment in a supercritical state or a subcritical state; a first solid-liquid separation step for separating the slurry after the first saccharification/dissolution step into solids and liquid; a second saccharification/dissolution step for saccharifying and dissolving the cellulose contained in the cellulosic biomass into a C6 saccharide by applying pressure to a dehydrated cake obtained by means of the first solid-liquid separation step in a hydraulic cylinder-type reaction vessel until the dehydrated cake reaches a supercritical state or a subcritical state; a second solid-liquid separation step for separating the slurry after the second saccharification/dissolution step into solids and liquid; a fermentation step for subjecting a saccharification liquid obtained by means of the first and second solid-liquid separation steps to alcohol fermentation; and a distillation step for concentrating ethanol by distilling the fermentation liquid obtained by means of the fermentation step.
Inventors:
KUSUDA HIROMASA (JP)
IZUMI NORIAKI (JP)
TAJIRI HIRONORI (JP)
TSUJITA SHOJI (JP)
NISHINO TAKASHI (JP)
IZUMI NORIAKI (JP)
TAJIRI HIRONORI (JP)
TSUJITA SHOJI (JP)
NISHINO TAKASHI (JP)
Application Number:
PCT/JP2012/006049
Publication Date:
April 04, 2013
Filing Date:
September 24, 2012
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
C12P7/10
Domestic Patent References:
| WO2011027389A1 | 2011-03-10 |
Foreign References:
| JP2011032388A | 2011-02-17 | |||
| JP2010279255A | 2010-12-16 | |||
| JP2010253348A | 2010-11-11 | |||
| JP2010166831A | 2010-08-05 | |||
| JP2009022239A | 2009-02-05 | |||
| JP2006075007A | 2006-03-23 | |||
| JP2002263465A | 2002-09-17 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)
Patent business corporation Owner old patent firm (JP)
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Claims: