FI94265B - Förfarande för blekning av ett lignocellulosamaterial genom syre- och enzymbehandling - Google Patents

Förfarande för blekning av ett lignocellulosamaterial genom syre- och enzymbehandling Download PDF

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Publication number
FI94265B
FI94265B FI900649A FI900649A FI94265B FI 94265 B FI94265 B FI 94265B FI 900649 A FI900649 A FI 900649A FI 900649 A FI900649 A FI 900649A FI 94265 B FI94265 B FI 94265B
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FI
Finland
Prior art keywords
xylanase
oxygen
treatment
pulp
lignocellulosic material
Prior art date
Application number
FI900649A
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English (en)
Finnish (fi)
Other versions
FI94265C (sv
FI900649A0 (sv
Inventor
Manoir John Richard Du
Paul Dubelsten
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Canadian Ind
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23194329&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI94265(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Canadian Ind filed Critical Canadian Ind
Publication of FI900649A0 publication Critical patent/FI900649A0/sv
Publication of FI94265B publication Critical patent/FI94265B/sv
Application granted granted Critical
Publication of FI94265C publication Critical patent/FI94265C/sv

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Y—ENZYMES
    • C12Y302/00—Hydrolases acting on glycosyl compounds, i.e. glycosylases (3.2)
    • C12Y302/01—Glycosidases, i.e. enzymes hydrolysing O- and S-glycosyl compounds (3.2.1)
    • C12Y302/01032—Xylan endo-1,3-beta-xylosidase (3.2.1.32), i.e. endo-1-3-beta-xylanase
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/14—Hydrolases (3)
    • C12N9/24—Hydrolases (3) acting on glycosyl compounds (3.2)
    • C12N9/2402—Hydrolases (3) acting on glycosyl compounds (3.2) hydrolysing O- and S- glycosyl compounds (3.2.1)
    • C12N9/2477—Hemicellulases not provided in a preceding group
    • C12N9/248—Xylanases
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Y—ENZYMES
    • C12Y302/00—Hydrolases acting on glycosyl compounds, i.e. glycosylases (3.2)
    • C12Y302/01—Glycosidases, i.e. enzymes hydrolysing O- and S-glycosyl compounds (3.2.1)
    • C12Y302/01008—Endo-1,4-beta-xylanase (3.2.1.8)
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Genetics & Genomics (AREA)
  • Biochemistry (AREA)
  • Zoology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Medicinal Chemistry (AREA)
  • Paper (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Claims (10)

1. Förfarande för blekning av lignocellulosamate-rlal som har med xylanas hydrolyserbara xylocidiska bind- 5 ningar, kännetecknat därav, att nämnda ligno-cellulosamaterial behandlas (a) med syre eller en syrehaltig gas i en syrebe-handling vilken utförs i ett alkaliskt medium för att ästadkomma delignifiering och/eller blekning av nämnda 10 material ooh (b) med en tillräcklig mängd av väsentligen cellu-lasfri xylanas i en xylanasbehandling för att ästadkomma hydrolys av nämnda hydrolyserbara xylocidiska bindningar i nämnda material; 15 varvid ett blekt lignocellulosamaterial erhälls.
2. Förfarande enligt patentkrav 1, kännetecknat därav, att lignocellulosamaterialet behandlas i en vattensuspension med en konsistens av 3 - 35 vikt-% med syre eller en syrehaltig gas, varvid syrets 20 partialtryck är 207 - 1724 kN/m2 tryckenheter, vid 70 -170 °C i 10 - 90 minuter.
3. Förfarande enligt patentkrav 1 eller 2, kännetecknat därav, att lignocellulosamaterialet behandlas i en vattensuspension med en konsistens av 1 - 20 .. 25 vikt-% med 1 - 500 IU/ml xylanas vid 20 - 80 °C i 1 - 48 timmar.
4. Förfarande enligt nägot av patentkraven 1-3, kännetecknat därav, att lignocellulosamaterialet dessutom underkastas minst en av följande behand- 30 lingar; .· behandling i en vattenhaltig lösning med klor och/- eller klordioxid; behandling i en alkalisk lösning i närvaro av pero-xid; och 35 behandling i en vattenhaltig lösning med hypoklo- rit, ozon eller svaveldioxid. t 94265
5. Förfarande enligt nägot av patentkraven 1-4, kännetecknat därav, att det blekta lignocellu-losamaterialet underkastas extrahering eller oxlderande extrahering i en vattenhaltig lösning med en alkallbas. 5
6. Förfarande enligt patentkrav 4, känne- t e c k n a t därav, att lignocellulosamaterialet efter behandlingarna med xylanas och syre eller en syrehaltig gas behandlas i en vattenhaltig lösning med klor och/eller klordioxid, detta material underkastas extrahering eller 10 oxiderande extrahering i en vattenhaltig lösning med en aikaiibas och sedan behandlas i en vattenhaltig lösning med klordioxid.
7. Förfarande enligt patentkrav 4, känne-t e c k n a t därav, att lignocellulosamaterialet efter 15 behandlingarna med xylanas och syre eller en syrehaltig gas behandlas i en vattenhaltig lösning med klordioxid och sedan behandlas i en vattenhaltig alkalisk lösning med väteperoxid.
8. Förfarande enligt nägot av patentkraven 1-7, 20 kännetecknat därav, att ett tvättningssteg eller förtjockningssteg tillsätts efter xylanasbehandlin-gen för att erhälla ett sädant filtrat som innehäller res-terande aktiv xylanas och som kan äteranvändas genom att nämnda filtrat tillsätts i ett lignocellulosamaterial som .. 25 skall behandlas med xylanas.
9. Förfarande enligt nägot av patentkraven 1-8, kännetecknat därav, att nämnda xylanas är er-hällen frän en rekombinantmikroorganism som är producerad genom att föra hybridplasmiden Streptomyces lividans tili 30 en mutantvärdstam med en väsentligen cellulosanegativ ak-.· tivitet, varvid nämnda plasmid är framställd genom att foga en xylanas(xln)gen som erhällits frän Streptomyces lividans 66 -stam tili en vektorplasmid pIJ702.
10. Förfarande enligt patentkrav 9, känne-35 tecknat därav, att värdstammen är Streptomyces lividans 10-164 -dubbelmutantstam med en väsentligen xyla-nasnegativ aktivitet.
FI900649A 1989-02-10 1990-02-09 Förfarande för blekning av ett lignocellulosamaterial genom syre- och enzymbehandling FI94265C (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30852989 1989-02-10
US07/308,529 US5179021A (en) 1989-02-10 1989-02-10 Pulp bleaching process comprising oxygen delignification and xylanase enzyme treatment

Publications (3)

Publication Number Publication Date
FI900649A0 FI900649A0 (sv) 1990-02-09
FI94265B true FI94265B (sv) 1995-04-28
FI94265C FI94265C (sv) 1995-08-10

Family

ID=23194329

Family Applications (1)

Application Number Title Priority Date Filing Date
FI900649A FI94265C (sv) 1989-02-10 1990-02-09 Förfarande för blekning av ett lignocellulosamaterial genom syre- och enzymbehandling

Country Status (17)

Country Link
US (1) US5179021A (sv)
EP (1) EP0386888B1 (sv)
JP (1) JP2731617B2 (sv)
AR (1) AR244827A1 (sv)
AT (1) ATE104380T1 (sv)
AU (1) AU629294B2 (sv)
BR (1) BR9000589A (sv)
CA (1) CA1339504C (sv)
DE (1) DE69008010T2 (sv)
ES (1) ES2063254T3 (sv)
FI (1) FI94265C (sv)
MX (1) MX168244B (sv)
MY (1) MY106228A (sv)
NO (1) NO174900C (sv)
NZ (1) NZ232456A (sv)
PT (1) PT93103B (sv)
ZA (1) ZA90897B (sv)

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Also Published As

Publication number Publication date
EP0386888A2 (en) 1990-09-12
JPH02264087A (ja) 1990-10-26
NZ232456A (en) 1992-02-25
US5179021A (en) 1993-01-12
DE69008010T2 (de) 1994-08-04
MX168244B (es) 1993-05-13
ATE104380T1 (de) 1994-04-15
BR9000589A (pt) 1991-01-15
FI94265C (sv) 1995-08-10
JP2731617B2 (ja) 1998-03-25
ES2063254T3 (es) 1995-01-01
ZA90897B (en) 1990-11-28
PT93103B (pt) 2001-05-31
EP0386888A3 (en) 1991-01-16
EP0386888B1 (en) 1994-04-13
AR244827A1 (es) 1993-11-30
AU629294B2 (en) 1992-10-01
NO900631D0 (no) 1990-02-09
MY106228A (en) 1995-04-29
NO174900C (no) 1994-07-27
NO174900B (no) 1994-04-18
NO900631L (no) 1990-08-13
DE69008010D1 (de) 1994-05-19
PT93103A (pt) 1990-08-31
AU4932190A (en) 1990-08-16
CA1339504C (en) 1997-10-21
FI900649A0 (sv) 1990-02-09

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