Title:
METHOD FOR PRODUCING LIGNIN FROM BIOMASS USING LIGNIN-DISSOLVING IONIC LIQUID, AND METHOD FOR PRODUCING LIGNIN, HEMICELLULOSE AND CELLULOSE
Document Type and Number:
WIPO Patent Application WO/2014/002674
Kind Code:
A1
Abstract:
An ionic liquid capable of dissolving lignin at a high level is developed, and a method for producing lignin from a biomass at low cost and safely using a simple apparatus is provided.
The present invention provides a method for producing lignin, which comprises the steps of: (1) mixing a lignin-dissolving ionic liquid represented by chemical formula (1) (wherein R1 and R3 may be the same as or different from each other and independently represent an alkyl group having 1 to 6 carbon atoms or an alkenyl group having 2 to 6 carbon atoms, R2 may be mono- or poly-substituted and represents a hydrogen atom, an amino group, a hydroxy group, a phenyl group, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms or an alkoxy group, Y represents CH2, O or S, n corresponds to the number of ring-constituting elements and is 1 or 2, and X represents an anion derived from an amino acid, wherein each of the alkyl group, the alkenyl group and the alkoxy group may have one or more atoms or groups independently selected from a halogen atom, an amino group, a phenyl group, a cycloalkyl group, an alkoxy group and a hydroxy group as a substituent or substituents) with a biomass at 20 to 80˚C to produce a mixed solution; (2) separating the mixed solution produced in the above-mentioned step (1) into an ionic liquid phase and a residue; and (3) adding a solvent to the ionic liquid phase produced in the above-mentioned step (2) to allow lignin to precipitate, and then separating and collecting lignin.
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Inventors:
ITOH TOSHIYUKI (JP)
Application Number:
PCT/JP2013/064885
Publication Date:
January 03, 2014
Filing Date:
May 29, 2013
Export Citation:
Assignee:
NAT UNIV CORP TOTTORI UNIV (JP)
International Classes:
C08H7/00; B27K5/00; C07D295/08; C07G1/00; C08B15/08; C08B37/14
Foreign References:
| JP2010084104A | 2010-04-15 | |||
| JP2012012568A | 2012-01-19 | |||
| JP2009189277A | 2009-08-27 | |||
| JP2010521155A | 2010-06-24 | |||
| JP2012144441A | 2012-08-02 |
Other References:
KAZUTAKA OHIRA ET AL.: "Design of Cellulose Dissolving Ionic Liquids Inspired by Nature", CHEMSUSCHEM, vol. 5, 2012, pages 388 - 391
NAWSHAD MUHAMMAD ET AL.: "Dissolution and Delignification of Bamboo Biomass Using Amino Acid-Based Ionic Liquid", APPL. BIOCHEM. BIOTECHNOL., vol. 165, 2011, pages 998 - 1009
YUKO HAMADA ET AL.: "Lignin Yokaisei o Yusuru Ion Ekitai no Kaihatsu", CSJ: THE CHEMICAL SOCIETY OF JAPAN KOEN YOKOSHU, vol. 93, no. 2, 2013, pages 231
KOHEI YOSHIDA ET AL.: "Mokushitsu Biomass kara Kankyo Chowagata Lignin Chushutsu no Tameno Ion Ekitai Yobai no Kaihatsu", CSJ: THE CHEMICAL SOCIETY OF JAPAN KOEN YOKOSHU, vol. 93, no. 2, 2013, pages 231
KAZUTAKA OHIRA ET AL.: "Amino Acid Ionic Liquid as an Efficient Cosolvent of Dimethyl Sulfoxide to Realize Cellulose Dissolution at Room Temperature", CHEM. LETT., vol. 41, 2012, pages 987 - 989
NAWSHAD MUHAMMAD ET AL.: "Dissolution and Delignification of Bamboo Biomass Using Amino Acid-Based Ionic Liquid", APPL. BIOCHEM. BIOTECHNOL., vol. 165, 2011, pages 998 - 1009
YUKO HAMADA ET AL.: "Lignin Yokaisei o Yusuru Ion Ekitai no Kaihatsu", CSJ: THE CHEMICAL SOCIETY OF JAPAN KOEN YOKOSHU, vol. 93, no. 2, 2013, pages 231
KOHEI YOSHIDA ET AL.: "Mokushitsu Biomass kara Kankyo Chowagata Lignin Chushutsu no Tameno Ion Ekitai Yobai no Kaihatsu", CSJ: THE CHEMICAL SOCIETY OF JAPAN KOEN YOKOSHU, vol. 93, no. 2, 2013, pages 231
KAZUTAKA OHIRA ET AL.: "Amino Acid Ionic Liquid as an Efficient Cosolvent of Dimethyl Sulfoxide to Realize Cellulose Dissolution at Room Temperature", CHEM. LETT., vol. 41, 2012, pages 987 - 989
Attorney, Agent or Firm:
SK INTELLECTUAL PROPERTY LAW FIRM et al. (JP)
SK patent business corporation (JP)
SK patent business corporation (JP)
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