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SE8200756L - SET TO MAKE CHEMICAL PAPER PAPER - Google Patents

SET TO MAKE CHEMICAL PAPER PAPER

Info

Publication number
SE8200756L
SE8200756L SE8200756A SE8200756A SE8200756L SE 8200756 L SE8200756 L SE 8200756L SE 8200756 A SE8200756 A SE 8200756A SE 8200756 A SE8200756 A SE 8200756A SE 8200756 L SE8200756 L SE 8200756L
Authority
SE
Sweden
Prior art keywords
chips
pulp
properties
paper
chemimechanical
Prior art date
Application number
SE8200756A
Other languages
Swedish (sv)
Inventor
Z C Prusas
Original Assignee
Mead Corp
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 Mead Corp filed Critical Mead Corp
Publication of SE8200756L publication Critical patent/SE8200756L/en

Links

Classifications

    • 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
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • 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
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

A process is provided for the production of chemimechanical pulp in the absence of silicate stabilizers. This chemimechanical pulp is characterized by (1) a pulp yield of at least 80% based on dry chips, (2) strength properties as shown by a combination of tear, burst and tensile properties which are superior to refiner mechanical pulp, and, (3) bleaching properties as shown by brightness properties which are superior to both refiner mechanical pulp and cold soda pulp. The chemimechanical pulp is prepared by impregnating hardwood chips with an alkaline peroxide liquor. The alkaline peroxide liquor is an aqueous solution containing about 0.5% to about 4% hydrogen peroxide and about 2.5% to about 10% sodium hydroxide based on dry chips. The impregnated chips have a pH greater than 7.5. The thus impregnated wood chips are then held for about 3 minutes to about 3 hours to soften and bleach the chips after which the chips are acidified to a pH of 7.5 or below by the addition of an acid material and thereafter defibrated by passing the acidified chips through refining apparatus operated at atmospheric pressure. The pulp produced by this defibration is recovered from the refining apparatus.
SE8200756A 1981-02-11 1982-02-10 SET TO MAKE CHEMICAL PAPER PAPER SE8200756L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23341581A 1981-02-11 1981-02-11

Publications (1)

Publication Number Publication Date
SE8200756L true SE8200756L (en) 1982-08-12

Family

ID=22877153

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8200756A SE8200756L (en) 1981-02-11 1982-02-10 SET TO MAKE CHEMICAL PAPER PAPER

Country Status (8)

Country Link
JP (1) JPS57149581A (en)
AU (1) AU545847B2 (en)
BR (1) BR8200512A (en)
CA (1) CA1173604A (en)
FI (1) FI820296A7 (en)
NO (1) NO820336L (en)
NZ (1) NZ199486A (en)
SE (1) SE8200756L (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8501246L (en) * 1985-03-13 1986-09-14 Eka Ab SET TO MANUFACTURE IN BLEACH, CHEMICAL MECHANICAL AND SEMI-CHEMICAL FIBER MASS USING ONE-STEP IMAGRATION
SE454186C (en) * 1985-03-13 1989-09-25 Eka Nobel Ab SET FOR PREPARATION OF CHEMICAL MECHANICAL
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
SE466060C (en) 1990-02-13 1995-09-11 Moelnlycke Ab Absorbent chemitermomechanical mass and preparation thereof
FR2675518B1 (en) * 1991-04-17 1996-10-18 Atochem PROCESS FOR THE PREPARATION OF HIGH YIELD AND BLEACHED PAPER PULP FROM WOOD CHIPS.
WO2003008703A1 (en) 2001-07-19 2003-01-30 Andritz Inc. Four stage alkaline peroxide mechanical pulping
US20040200586A1 (en) 2002-07-19 2004-10-14 Martin Herkel Four stage alkaline peroxide mechanical pulping
JP4501329B2 (en) * 2002-03-29 2010-07-14 日本製紙株式会社 Coated paper for gravure printing
CN104389214A (en) * 2014-10-28 2015-03-04 广西大学 Method for preparing APMP (Alkaline Peroxide Mechanical Pulp) by utilizing fresh bamboos

Also Published As

Publication number Publication date
CA1173604A (en) 1984-09-04
AU545847B2 (en) 1985-08-01
FI820296L (en) 1982-08-12
NZ199486A (en) 1984-12-14
BR8200512A (en) 1982-12-07
JPS57149581A (en) 1982-09-16
NO820336L (en) 1982-08-12
AU7947182A (en) 1982-08-19
FI820296A7 (en) 1982-08-12

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