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WO1982001568A1 - Utilisation de l'ethanol dans le pulpage alcalin - Google Patents

Utilisation de l'ethanol dans le pulpage alcalin Download PDF

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Publication number
WO1982001568A1
WO1982001568A1 PCT/US1980/001451 US8001451W WO8201568A1 WO 1982001568 A1 WO1982001568 A1 WO 1982001568A1 US 8001451 W US8001451 W US 8001451W WO 8201568 A1 WO8201568 A1 WO 8201568A1
Authority
WO
WIPO (PCT)
Prior art keywords
ethanol
pulping
wood
pulp
naoh
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US1980/001451
Other languages
English (en)
Inventor
Renata Marton
Stephen G Granzow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/US1980/001451 priority Critical patent/WO1982001568A1/fr
Priority to EP19810901196 priority patent/EP0063565A1/fr
Publication of WO1982001568A1 publication Critical patent/WO1982001568A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment

Definitions

  • This invention relates to wood pulping using chemical pulping media and more particularly relates to such media which result in superior wood pulps with a lower refining energy requirement.
  • a method for manufacturing wood pulp which comprises pulping wood with a mixture of ethanol and sodium hydroxide.
  • the invention also includes wood pulp manufactured in accordance with the method. DETAILED DESCRIPTION OF THE INVENTION
  • the pulping time in accordance with the preferred embodiment, is from about 1/2 to about 4 hours and the pulping temperature is from about 100 to about 200°C.
  • any wood can be pulped in accordance with the method of the invention to obtain a superior wood pulp than was obtained by commercially usuable prior arti chemical wood pulping methods.
  • Spruce chips are cooked in an electrically heated digester with mixtures of water and ethanol (1 :1 by volume), at a 5:1 liquor to wood ratio, 170°C for 2-1/2 hr.
  • cooks under the same conditions were carried out with the addition of 20% NaOH (calculated on wood), and with alkali alone.
  • Table 1 shows that ethanol plus NaOH (column 1) is more effective than either ingredient alone
  • the ethanol-NaOH process is especially significant in the area of high-yield pulping, because it allows a greater preservation of carbohydrates than NaOH alone. So, e.g., an ethanol-NaOH pulp of 81.6% yield (obtained with 5% NaOH, 170°C, 45 min.) has a Kappa number of 157, while a soda pulp (obtained with 20% NaOH) of 66% yield has a very similar (147) Kappa number. This is because in soda pulping only limited delignif ication can occur, thus low Kappa number pulps are obtained.

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  • Paper (AREA)

Abstract

Procede de fabrication de pulpe de bois comprenant la reduction en pulpe du bois au moyen d'un melange d'ethanol et d'hydroxyde de sodium et pulpe de bois obtenue conformement a ce procede.
PCT/US1980/001451 1980-10-29 1980-10-29 Utilisation de l'ethanol dans le pulpage alcalin Ceased WO1982001568A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US1980/001451 WO1982001568A1 (fr) 1980-10-29 1980-10-29 Utilisation de l'ethanol dans le pulpage alcalin
EP19810901196 EP0063565A1 (fr) 1980-10-29 1980-10-29 Utilisation de l'ethanol dans le pulpage alcalin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1980/001451 WO1982001568A1 (fr) 1980-10-29 1980-10-29 Utilisation de l'ethanol dans le pulpage alcalin
WOUS80/01451801029 1980-10-29

Publications (1)

Publication Number Publication Date
WO1982001568A1 true WO1982001568A1 (fr) 1982-05-13

Family

ID=22154626

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1980/001451 Ceased WO1982001568A1 (fr) 1980-10-29 1980-10-29 Utilisation de l'ethanol dans le pulpage alcalin

Country Status (2)

Country Link
EP (1) EP0063565A1 (fr)
WO (1) WO1982001568A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496426A (en) * 1982-04-06 1985-01-29 Md-Verwaltungesellschaft Nicolaus Gmbh & Co. Kg Process for the continuous extraction of vegetable-fiber material in two stages
WO2012027767A1 (fr) 2010-09-02 2012-03-08 Annikki Gmbh Procédé d'obtention de lignine
WO2013164234A1 (fr) 2012-05-03 2013-11-07 Annikki Gmbh Procédé de production de cellulose à faible teneur en lignine à partir d'un matériau lignocellulosique
WO2015075080A1 (fr) 2013-11-20 2015-05-28 Annikki Gmbh Procédé de fractionnement de matières lignocellulosiques

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166540A (en) * 1937-12-17 1939-07-18 Univ Minnesota Alcoholic treatment of ligneous cellulosic material
JPH05149905A (ja) * 1991-12-02 1993-06-15 Canon Inc 測定装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166540A (en) * 1937-12-17 1939-07-18 Univ Minnesota Alcoholic treatment of ligneous cellulosic material
JPH05149905A (ja) * 1991-12-02 1993-06-15 Canon Inc 測定装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496426A (en) * 1982-04-06 1985-01-29 Md-Verwaltungesellschaft Nicolaus Gmbh & Co. Kg Process for the continuous extraction of vegetable-fiber material in two stages
WO2012027767A1 (fr) 2010-09-02 2012-03-08 Annikki Gmbh Procédé d'obtention de lignine
US9487549B2 (en) 2010-09-02 2016-11-08 Annikki Gmbh Preparation of lignin
WO2013164234A1 (fr) 2012-05-03 2013-11-07 Annikki Gmbh Procédé de production de cellulose à faible teneur en lignine à partir d'un matériau lignocellulosique
WO2015075080A1 (fr) 2013-11-20 2015-05-28 Annikki Gmbh Procédé de fractionnement de matières lignocellulosiques

Also Published As

Publication number Publication date
EP0063565A1 (fr) 1982-11-03

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