Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta

Translated title of the contribution: Method of delignifying wood

Atte Mikkelson (Inventor), Juha Maijala (Inventor), Jaakko Hiltunen (Inventor)

Research output: PatentResearch

Abstract


A method of delignifying a lignocellulosic raw-material, which contains lignin with a benzylic ring structure. The method comprises carboxylating at least a part of the benzylic ring structure by contacting the raw material at anhydrous conditions withcarbon dioxide which is maintained in supercriticalconditionto formbenzylic carboxylates. The benzylic carboxylate are leached out in an aqueous medium to remove at least a part of the lignin. The present process can be used as a pre-treatment for producing fine mechanical pulp, or producing cellulose. The new method is environmentally-friendlyin the respect that no sulphur is used, water consumption is small and there might be a reduced need for use of bleaching chemicals.

WO2009083652A3

Method of delignifying wood | Request PDF. Available from: https://www.researchgate.net/publication/323413511_Method_of_delignifying_wood [accessed Sep 18 2018].
Original languageFinnish
Patent numberFI 122974 B
IPCD21C 3/00
Priority date28/12/07
Filing date28/12/07
Publication statusPublished - 29 Jun 2009
MoE publication typeNot Eligible

Fingerprint

raw materials
lignin
mechanical pulp
methodology
bleaching
sulfur
cellulose
pretreatment
water

Cite this

Mikkelson, A., Maijala, J., & Hiltunen, J. (2009). IPC No. D21C 3/00. Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta. (Patent No. FI 122974 B).
Mikkelson, Atte (Inventor) ; Maijala, Juha (Inventor) ; Hiltunen, Jaakko (Inventor). / Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta. IPC No.: D21C 3/00. Patent No.: FI 122974 B. Dec 28, 2007.
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abstract = "A method of delignifying a lignocellulosic raw-material, which contains lignin with a benzylic ring structure. The method comprises carboxylating at least a part of the benzylic ring structure by contacting the raw material at anhydrous conditions withcarbon dioxide which is maintained in supercriticalconditionto formbenzylic carboxylates. The benzylic carboxylate are leached out in an aqueous medium to remove at least a part of the lignin. The present process can be used as a pre-treatment for producing fine mechanical pulp, or producing cellulose. The new method is environmentally-friendlyin the respect that no sulphur is used, water consumption is small and there might be a reduced need for use of bleaching chemicals.WO2009083652A3 Method of delignifying wood | Request PDF. Available from: https://www.researchgate.net/publication/323413511_Method_of_delignifying_wood [accessed Sep 18 2018].",
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Mikkelson, A, Maijala, J & Hiltunen, J Dec. 28 2007, Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta, Patent No. FI 122974 B, IPC No. D21C 3/00.

Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta. / Mikkelson, Atte (Inventor); Maijala, Juha (Inventor); Hiltunen, Jaakko (Inventor).

IPC No.: D21C 3/00. Patent No.: FI 122974 B. Dec 28, 2007.

Research output: PatentResearch

TY - PAT

T1 - Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta

AU - Mikkelson, Atte

AU - Maijala, Juha

AU - Hiltunen, Jaakko

PY - 2009/6/29

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N2 - A method of delignifying a lignocellulosic raw-material, which contains lignin with a benzylic ring structure. The method comprises carboxylating at least a part of the benzylic ring structure by contacting the raw material at anhydrous conditions withcarbon dioxide which is maintained in supercriticalconditionto formbenzylic carboxylates. The benzylic carboxylate are leached out in an aqueous medium to remove at least a part of the lignin. The present process can be used as a pre-treatment for producing fine mechanical pulp, or producing cellulose. The new method is environmentally-friendlyin the respect that no sulphur is used, water consumption is small and there might be a reduced need for use of bleaching chemicals.WO2009083652A3 Method of delignifying wood | Request PDF. Available from: https://www.researchgate.net/publication/323413511_Method_of_delignifying_wood [accessed Sep 18 2018].

AB - A method of delignifying a lignocellulosic raw-material, which contains lignin with a benzylic ring structure. The method comprises carboxylating at least a part of the benzylic ring structure by contacting the raw material at anhydrous conditions withcarbon dioxide which is maintained in supercriticalconditionto formbenzylic carboxylates. The benzylic carboxylate are leached out in an aqueous medium to remove at least a part of the lignin. The present process can be used as a pre-treatment for producing fine mechanical pulp, or producing cellulose. The new method is environmentally-friendlyin the respect that no sulphur is used, water consumption is small and there might be a reduced need for use of bleaching chemicals.WO2009083652A3 Method of delignifying wood | Request PDF. Available from: https://www.researchgate.net/publication/323413511_Method_of_delignifying_wood [accessed Sep 18 2018].

M3 - Patent

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Y2 - 2007/12/28

ER -

Mikkelson A, Maijala J, Hiltunen J, inventors. Menetelmä ligniinin poistamiseksi lignoselluloosapitoisesta raaka-aineesta. D21C 3/00. 2009 Jun 29.