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Title:
METHOD FOR PRODUCING ETHANOL USING CELLULOSIC BIOMASS AS STARTING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/046624
Kind Code:
A1
Abstract:
The purpose of the present invention is to control processing costs by collecting the volatile organic acid from a C5 saccharide liquid after saccharifying and dissolving the hemicellulose using the volatile organic acid as the catalyst and by reusing the volatile organic acid as the catalyst for saccharifying and dissolving the hemicellulose in a method for producing ethanol using cellulosic biomass as the starting material. In the present invention, it is possible to easily collect volatile organic acids (the volatile organic acid added in a slurry and the volatile organic acid created as a by-product) contained in a C5 saccharide liquid by adding a small amount of sulfuric acid in the C5 saccharide liquid and by subjecting the C5 saccharide liquid to air-stripping treatment after the volatile organic acid is added to a slurry as a catalyst and the hemicellulose is saccharified and dissolved. Moreover, it is possible to continuously improve the saccharification/dissolution rate when saccharifying and dissolving the hemicellulose into a C5 saccharide by means of the volatile organic acid by adding the collected volatile organic acid as a catalyst into another slurry of the cellulosic biomass.

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Inventors:
KUSUDA HIROMASA (JP)
IZUMI NORIAKI (JP)
TAJIRI HIRONORI (JP)
TSUJITA SHOJI (JP)
NISHINO TAKASHI (JP)
MASAMOTO MANABU (JP)
Application Number:
PCT/JP2012/006050
Publication Date:
April 04, 2013
Filing Date:
September 24, 2012
Export Citation:
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Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
C12P7/10
Foreign References:
JP2011032388A2011-02-17
JP2010279255A2010-12-16
JP2010253348A2010-11-11
JP2010166831A2010-08-05
JP2009195189A2009-09-03
JP2009022239A2009-02-05
JP2008043229A2008-02-28
JP2006075007A2006-03-23
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
Patent business corporation Owner old patent firm (JP)
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