WO1993023477A1 - Production of a lignin solution or gel, of a binder and of a wood composite - Google Patents

Production of a lignin solution or gel, of a binder and of a wood composite Download PDF

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Publication number
WO1993023477A1
WO1993023477A1 PCT/DK1993/000167 DK9300167W WO9323477A1 WO 1993023477 A1 WO1993023477 A1 WO 1993023477A1 DK 9300167 W DK9300167 W DK 9300167W WO 9323477 A1 WO9323477 A1 WO 9323477A1
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WO
WIPO (PCT)
Prior art keywords
lignin
gel
binder
solution
production
Prior art date
Application number
PCT/DK1993/000167
Other languages
English (en)
French (fr)
Inventor
Birgitte Yde
Original Assignee
Novo Nordisk A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Novo Nordisk A/S filed Critical Novo Nordisk A/S
Publication of WO1993023477A1 publication Critical patent/WO1993023477A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J197/00—Adhesives based on lignin-containing materials
    • C09J197/005—Lignin

Definitions

  • This invention relates to a method of preparing a solution or gel of lignin at high concentration, to a method of preparing a binder using said solution or gel, and to a method of producing a wood composite using said binder.
  • the binder e.g. by spraying
  • the invention provides a method of preparing a solution or gel of lignin, characterized by comprising: a) treatment of the lignin above pH 8, followed by b) lowering the pH below 7. Further, the invention also provides a method for producing an active binder for wood products from lignin, characterized by comprising preparation of a lignin solution or gel according to any preceding claim, and treating said solution or gel with a phenol oxidizing enzyme system. Finally, the invention provides a method of producing a wood composite from wood fibre material, characterized by comprising production of a binder according to claim 6, coating the wood fibre material with said binder, followed by pressing and heating.
  • Lignin The invention is applicable to any quality of lignin , particularly non- sulfonated Ifgnin such as indulin which results in a strong binder when treated with a phenol-oxidizing system, but has a low solubility in water at weakly acidic to neutral pH where these enzymes are mostly active.
  • Step b) is conveniently conducted by holding at pH 5-7 for 5-30 minutes at 10-50°C.
  • a lignin solution can be obtained by conducting step a) at pH 8-9.5 for
  • a lignin gel can be obtained by conducting step a) at pH 9.5-10.5 for
  • pH tends to drop during step a) and to rise during step b).
  • the pH can be kept in the indicated ranges by continuous or repeated pH adjustment or by use of a buffer at a sufficiently high concentration (e.g. above 0.4 M).
  • Lignin can be used in an amount of 25-250 g/l, and solutions or gels containing above 100 g/l of lignin can be obtained.
  • the enzyme system used in the invention consists of a suitable oxidase together with 0 2 or a suitable peroxidase together with H 2 0 2 .
  • Suitable enzymes are those which oxidize and polymerize aromatic compounds such as phenols and lignin.
  • Suitable enzymes are catechol oxidase (EC 1.10.3.1), laccase (EC 1.10.3.2) and peroxidase (EC 1.11.1.7).
  • Some preferred enzymes are peroxidase derived from a strain of Coprinus, e.g. C. cinereus or C. macrorhiz ⁇ s, peroxidase from Bacillus, e.g. B. p ⁇ mil ⁇ s and laccase from Trametes, e.g. T. versicolor (previously called Polyporus). It may be preferable to use two different phenol oxidizing enzymes together.
  • the amount of enzyme should generally be in the range 10-10,000 PODU or laccase units per g of lignin solid (activity units defined below).
  • H 2 O z Molecular oxygen from the atmosphere will usually be present in sufficient quantity.
  • a suitable amount of H 2 O z will usually be in the range 0.01 -10 mM, particularly 1-10 mM.
  • Suitable conditions for the enzymatic treatment of lignin to produce binder are known in the art. Typical conditions are 20-60°C and pH 5-6 for laccase, and 20-60°C and pH 7-8 for peroxidase.
  • binder to wood fibre material and pressing under heat to produce a wood composite can be done by methods known in the art.
  • a typical example is production of particle board from wood particles.
  • the binder is applied by spraying in an amount of 40-100 g/kg of wood fibre material, and pressing is typically done by compressing for 2-4 minutes at a pressure of 20-40 kg/cm 2 (2-4 Pa) with temperature rising form 35 to 190°C in 20 seconds.
  • the samples pretreated at pH 8 and 9 were solutions from which undissolved lignin could be removed by centrifugation.
  • the samples pretreated at pH 10 were gels, and the results shown above are for the remaining solution after removal of gelled lignin by centrifugation. These gels were suitable as such for production of binder, reacting morte rapidly with peroxidase and giving a stronger binder than untreated lignin.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Biochemistry (AREA)
  • Wood Science & Technology (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
PCT/DK1993/000167 1992-05-18 1993-05-18 Production of a lignin solution or gel, of a binder and of a wood composite WO1993023477A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK63992A DK63992D0 (enrdf_load_stackoverflow) 1992-05-18 1992-05-18
DK639/92 1992-05-18

Publications (1)

Publication Number Publication Date
WO1993023477A1 true WO1993023477A1 (en) 1993-11-25

Family

ID=8095865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1993/000167 WO1993023477A1 (en) 1992-05-18 1993-05-18 Production of a lignin solution or gel, of a binder and of a wood composite

Country Status (3)

Country Link
AU (1) AU4308893A (enrdf_load_stackoverflow)
DK (1) DK63992D0 (enrdf_load_stackoverflow)
WO (1) WO1993023477A1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998031728A1 (de) * 1997-01-14 1998-07-23 Stockhausen Gmbh & Co Kg Zwischenprodukt für die herstellung von ligninpolymerisaten und dessen verwendung für die herstellung von reagentien für herstellung von verbundwerkstoffen aus pflanzlichen fasern, wasserfesten papieren und pappen sowie duroplasten aus ligninderivaten
WO1998031761A1 (en) * 1997-01-14 1998-07-23 Neste Chemicals Oy Adhesives for fiber boards and a process for the preparation thereof
WO1998031762A1 (en) * 1997-01-14 1998-07-23 Neste Chemicals Oy A new adhesive for fiber boards
WO1998031729A1 (de) * 1997-01-14 1998-07-23 Pfleiderer Unternehmensverwaltung Gmbh & Co. Kg Zwischenprodukt für die herstellung von ligninpolymerisaten und dessen verwendung zur herstellung von holzwerkstoffen
US6072015A (en) * 1998-12-08 2000-06-06 Genencor International, Inc. Lignin based paint
US6217942B1 (en) 1998-12-08 2001-04-17 Genencor International, Inc. Lignin based coating
CN102817286A (zh) * 2012-05-24 2012-12-12 湖北工业大学 一种无甲醛秸秆纤维板的制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357454A (en) * 1980-09-02 1982-11-02 Eka Ab Binder
US4432921A (en) * 1980-10-08 1984-02-21 Gesellschaft Fur Biotechnologische Forschung Process for producing a binder for wood materials
DE3644397C1 (de) * 1986-12-24 1988-05-05 Pfleiderer Fa G A Emissionsarmes Bindemittel fuer holz- und cellulosehaltige Werkstoffe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357454A (en) * 1980-09-02 1982-11-02 Eka Ab Binder
US4432921A (en) * 1980-10-08 1984-02-21 Gesellschaft Fur Biotechnologische Forschung Process for producing a binder for wood materials
DE3644397C1 (de) * 1986-12-24 1988-05-05 Pfleiderer Fa G A Emissionsarmes Bindemittel fuer holz- und cellulosehaltige Werkstoffe

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998031728A1 (de) * 1997-01-14 1998-07-23 Stockhausen Gmbh & Co Kg Zwischenprodukt für die herstellung von ligninpolymerisaten und dessen verwendung für die herstellung von reagentien für herstellung von verbundwerkstoffen aus pflanzlichen fasern, wasserfesten papieren und pappen sowie duroplasten aus ligninderivaten
WO1998031761A1 (en) * 1997-01-14 1998-07-23 Neste Chemicals Oy Adhesives for fiber boards and a process for the preparation thereof
WO1998031762A1 (en) * 1997-01-14 1998-07-23 Neste Chemicals Oy A new adhesive for fiber boards
WO1998031729A1 (de) * 1997-01-14 1998-07-23 Pfleiderer Unternehmensverwaltung Gmbh & Co. Kg Zwischenprodukt für die herstellung von ligninpolymerisaten und dessen verwendung zur herstellung von holzwerkstoffen
AU731726B2 (en) * 1997-01-14 2001-04-05 Neste Chemicals Oy A new adhesive for fiber boards
AU735443B2 (en) * 1997-01-14 2001-07-05 Stockhausen Gmbh & Co. Kg Intermediate for the production of lignin polymers and their use in the production of reagents for the production of composite materials from plant fibers, waterproof papers and cardboards as well as duroplastics from lignin derivatives
US6287708B1 (en) 1997-01-14 2001-09-11 Neste Chemicals Oy Adhesive for fiber boards
US6072015A (en) * 1998-12-08 2000-06-06 Genencor International, Inc. Lignin based paint
US6217942B1 (en) 1998-12-08 2001-04-17 Genencor International, Inc. Lignin based coating
CN102817286A (zh) * 2012-05-24 2012-12-12 湖北工业大学 一种无甲醛秸秆纤维板的制造方法

Also Published As

Publication number Publication date
DK63992D0 (enrdf_load_stackoverflow) 1992-05-18
AU4308893A (en) 1993-12-13

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