EP0063565A1 - Utilisation de l'ethanol dans le pulpage alcalin - Google Patents

Utilisation de l'ethanol dans le pulpage alcalin

Info

Publication number
EP0063565A1
EP0063565A1 EP19810901196 EP81901196A EP0063565A1 EP 0063565 A1 EP0063565 A1 EP 0063565A1 EP 19810901196 EP19810901196 EP 19810901196 EP 81901196 A EP81901196 A EP 81901196A EP 0063565 A1 EP0063565 A1 EP 0063565A1
Authority
EP
European Patent Office
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.)
Withdrawn
Application number
EP19810901196
Other languages
German (de)
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
Publication of EP0063565A1 publication Critical patent/EP0063565A1/fr
Withdrawn legal-status Critical Current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.

Landscapes

  • 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.
EP19810901196 1980-10-29 1980-10-29 Utilisation de l'ethanol dans le pulpage alcalin Withdrawn EP0063565A1 (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP0063565A1 true EP0063565A1 (fr) 1982-11-03

Family

ID=22154626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810901196 Withdrawn EP0063565A1 (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)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212767A1 (de) * 1982-04-06 1983-10-06 Nicolaus Md Verwaltungsges Verfahren und reaktor zum kontinuierlichen aufschliessen von pflanzenfasermaterial
AT510346A1 (de) 2010-09-02 2012-03-15 Annikki Gmbh Ligningewinnung
AR091998A1 (es) 2012-05-03 2015-03-18 Annikki Gmbh Procedimiento de preparacion de celulosa con baja concentracion de lignina
HUE041549T2 (hu) 2013-11-20 2019-05-28 Annikki Gmbh Eljárás lignocellulózok frakcionálására
EP4722446A1 (fr) 2024-10-01 2026-04-08 Annikki GmbH Procédé de production de pâte à papier

Family Cites Families (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
JP3093387B2 (ja) * 1991-12-02 2000-10-03 キヤノン株式会社 測定装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8201568A1 *

Also Published As

Publication number Publication date
WO1982001568A1 (fr) 1982-05-13

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Legal Events

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Effective date: 19821227