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FI43032C - 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 - Google Patents

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

Info

Publication number
FI43032C
FI43032C FI641078A FI107864A FI43032C FI 43032 C FI43032 C FI 43032C FI 641078 A FI641078 A FI 641078A FI 107864 A FI107864 A FI 107864A FI 43032 C FI43032 C FI 43032C
Authority
FI
Finland
Prior art keywords
heating
making
elevated temperature
wood chips
steam atmosphere
Prior art date
Application number
FI641078A
Other languages
Finnish (fi)
Other versions
FI43032B (en
Inventor
Arne Johan Arthur Asplund
Karl Nicolaus Cederquist
Original Assignee
Defibrator Ab
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 Defibrator Ab filed Critical Defibrator Ab
Publication of FI43032B publication Critical patent/FI43032B/fi
Application granted granted Critical
Publication of FI43032C publication Critical patent/FI43032C/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
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
FI641078A 1963-05-21 1964-05-20 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 FI43032C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE563463 1963-05-21

Publications (2)

Publication Number Publication Date
FI43032B FI43032B (en) 1970-09-02
FI43032C true FI43032C (en) 1973-01-26

Family

ID=20266882

Family Applications (1)

Application Number Title Priority Date Filing Date
FI641078A FI43032C (en) 1963-05-21 1964-05-20 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

Country Status (8)

Country Link
US (1) US3558428A (en)
BE (1) BE648248A (en)
CH (1) CH430421A (en)
DE (1) DE1517169A1 (en)
FI (1) FI43032C (en)
FR (1) FR1395391A (en)
GB (1) GB1064567A (en)
NL (1) NL6405633A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4187141A (en) * 1975-02-24 1980-02-05 Alf Societe Anonyme Method of producing bleached mechanical pulp
CA1075857A (en) * 1976-02-20 1980-04-22 Price Company Limited (The) Chemical pretreatment of wood prior to making refiner groundwood
US4116758A (en) * 1976-05-14 1978-09-26 Canadian International Paper Co. Method of producing high yield chemimechanical pulps
US4211605A (en) * 1978-08-03 1980-07-08 Canadian International Paper Company High yield chemimechanical pulping processes
SE420742B (en) * 1980-03-14 1981-10-26 Sca Development Ab SET FOR TREATMENT OF WOOD TIP FOR MASS MANUFACTURING
US4486267A (en) * 1983-11-14 1984-12-04 Mead Corporation Chemithermomechanical pulping process employing separate alkali and sulfite treatments
US4995943A (en) * 1985-12-27 1991-02-26 Rehberg Karl H Pretreatment of cellulosic material with carbon dioxide
DE4307660C1 (en) * 1993-03-11 1994-08-04 Feldmuehle Ag Stora Manufacture of chemo-mechanical and / or chemo-thermo-mechanical wood materials

Also Published As

Publication number Publication date
CH430421A (en) 1967-02-15
FI43032B (en) 1970-09-02
NL6405633A (en) 1964-11-23
DE1517169A1 (en) 1969-10-09
BE648248A (en) 1964-09-16
US3558428A (en) 1971-01-26
GB1064567A (en) 1967-04-05
FR1395391A (en) 1965-04-09

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