FI954231A0 - Process for the preparation of chemomechanical and / or chemothermomechanical wood pulp - Google Patents

Process for the preparation of chemomechanical and / or chemothermomechanical wood pulp

Info

Publication number
FI954231A0
FI954231A0 FI954231A FI954231A FI954231A0 FI 954231 A0 FI954231 A0 FI 954231A0 FI 954231 A FI954231 A FI 954231A FI 954231 A FI954231 A FI 954231A FI 954231 A0 FI954231 A0 FI 954231A0
Authority
FI
Finland
Prior art keywords
raw materials
chemomechanical
wood
preparation
chemothermomechanical
Prior art date
Application number
FI954231A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI954231A (en
Inventor
Rudolf Patt
Jens Neumann
Original Assignee
Feldmuehle Ag Stora
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 Feldmuehle Ag Stora filed Critical Feldmuehle Ag Stora
Publication of FI954231A0 publication Critical patent/FI954231A0/en
Publication of FI954231A publication Critical patent/FI954231A/en

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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • 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
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Processing Of Solid Wastes (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

A process is disclosed for producing chemomechanical and/or chemothermomechanical wood products from lignocellulosic raw materials, such as wood chips. The raw materials are impregnated with a SO2-containing solution and then subjected to a sulfonating reaction in a gaseous or vapour phase at a pH value equal to 2 or less. When the sulfonating reaction is finished, the raw materials or wood chips are defibrated in a defibrating unit known per se and are crushed down to a preselected fineness degree. The wood product thus obtained is characterized by remarkable solidity and by requiring a reduced specific crushing energy.
FI954231A 1993-03-11 1995-09-08 Process for the preparation of chemomechanical and / or chemothermomechanical wood pulp FI954231A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4307660A DE4307660C1 (en) 1993-03-11 1993-03-11 Manufacture of chemo-mechanical and / or chemo-thermo-mechanical wood materials
PCT/EP1994/000627 WO1994020670A1 (en) 1993-03-11 1994-03-03 Process for producing chemomechanical and/or chemothermomechanical wood products

Publications (2)

Publication Number Publication Date
FI954231A0 true FI954231A0 (en) 1995-09-08
FI954231A FI954231A (en) 1995-09-08

Family

ID=6482482

Family Applications (1)

Application Number Title Priority Date Filing Date
FI954231A FI954231A (en) 1993-03-11 1995-09-08 Process for the preparation of chemomechanical and / or chemothermomechanical wood pulp

Country Status (10)

Country Link
EP (1) EP0688373B1 (en)
JP (1) JPH08507333A (en)
AT (1) ATE144011T1 (en)
CA (1) CA2157886A1 (en)
DE (2) DE4307660C1 (en)
DK (1) DK0688373T3 (en)
ES (1) ES2095755T3 (en)
FI (1) FI954231A (en)
NO (1) NO953389D0 (en)
WO (1) WO1994020670A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057208A1 (en) * 2009-11-27 2011-06-01 Technische Universität Dresden Process for the production of lignocellulosic paper pulps and papers, cartons and boards derived therefrom

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI43032C (en) * 1963-05-21 1973-01-26 Defibrator Ab A method of making chemimechanical pulps by heating and grinding wood chips impregnated with sulphite solutions in a steam atmosphere and at an elevated temperature
DE2445523A1 (en) * 1974-09-24 1976-04-01 Waldhof Aschaffenburg Papier METHOD FOR MANUFACTURING PULP
SE404044B (en) * 1975-11-13 1978-09-18 Mo Och Domsjoe Ab LIGHT ABSORBING LIGNIRIK HOGUTYTESCELLULOSAMASSA AND PROCEDURES FOR THE PREPARATION OF THIS
US4211605A (en) * 1978-08-03 1980-07-08 Canadian International Paper Company High yield chemimechanical pulping processes
US4634499A (en) * 1983-05-02 1987-01-06 The Procter & Gamble Company Sulfite process for making pulp having a tactile softness from hardwood chips
DE3932347A1 (en) * 1989-09-28 1991-04-11 Feldmuehle Ag PRODUCTION OF CHEMO-MECHANICAL AND / OR CHEMO-THERMO-MECHANICAL WOODEN MATERIALS
SE9002039D0 (en) * 1990-06-07 1990-06-07 Svenska Traeforskningsinst SAVE TO PREPARE

Also Published As

Publication number Publication date
EP0688373B1 (en) 1996-10-09
WO1994020670A1 (en) 1994-09-15
NO953389L (en) 1995-08-29
FI954231A (en) 1995-09-08
ES2095755T3 (en) 1997-02-16
DK0688373T3 (en) 1997-03-24
NO953389D0 (en) 1995-08-29
DE4307660C1 (en) 1994-08-04
JPH08507333A (en) 1996-08-06
EP0688373A1 (en) 1995-12-27
DE59400830D1 (en) 1996-11-14
CA2157886A1 (en) 1994-09-15
ATE144011T1 (en) 1996-10-15

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