FI71779C - Foerfarande foer framstaellning av mekanisk raffinoermassa. - Google Patents

Foerfarande foer framstaellning av mekanisk raffinoermassa. Download PDF

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Publication number
FI71779C
FI71779C FI802654A FI802654A FI71779C FI 71779 C FI71779 C FI 71779C FI 802654 A FI802654 A FI 802654A FI 802654 A FI802654 A FI 802654A FI 71779 C FI71779 C FI 71779C
Authority
FI
Finland
Prior art keywords
pulp
treatment
mechanical
temperature
properties
Prior art date
Application number
FI802654A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI802654A (fi
FI71779B (fi
Inventor
Adrian John Barnet
Alan C Shaw
Charles Donald Logan
Original Assignee
Qns Paper
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 Qns Paper filed Critical Qns Paper
Publication of FI802654A publication Critical patent/FI802654A/fi
Publication of FI71779B publication Critical patent/FI71779B/fi
Application granted granted Critical
Publication of FI71779C publication Critical patent/FI71779C/fi

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
    • D21C3/04—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

  • Paper (AREA)
FI802654A 1979-12-17 1980-08-22 Foerfarande foer framstaellning av mekanisk raffinoermassa. FI71779C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10466879A 1979-12-17 1979-12-17
US10466879 1979-12-17

Publications (3)

Publication Number Publication Date
FI802654A FI802654A (fi) 1981-06-18
FI71779B FI71779B (fi) 1986-10-31
FI71779C true FI71779C (fi) 1987-02-09

Family

ID=22301732

Family Applications (1)

Application Number Title Priority Date Filing Date
FI802654A FI71779C (fi) 1979-12-17 1980-08-22 Foerfarande foer framstaellning av mekanisk raffinoermassa.

Country Status (9)

Country Link
EP (1) EP0030778B1 (xx)
JP (1) JPS5691093A (xx)
AU (1) AU531907B2 (xx)
BR (1) BR8005950A (xx)
CA (1) CA1145107A (xx)
DE (1) DE3064270D1 (xx)
FI (1) FI71779C (xx)
MX (1) MX156081A (xx)
NZ (1) NZ194407A (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502918A (en) * 1981-06-10 1985-03-05 Macmillan Bloedel Limited Two-stage chemical treatment of mechanical wood pulp with sodium sulfite
SE456430B (sv) * 1985-11-06 1988-10-03 Sunds Defibrator Sett for framstellning av mekanisk massa
US4718980A (en) * 1985-12-30 1988-01-12 Weyerhaeuser Company Interstage treatment of mechanical pulp
SE466060C (sv) 1990-02-13 1995-07-11 Moelnlycke Ab Absorberande kemitermomekanisk massa och framställning därav
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
WO1997022749A1 (en) * 1995-12-19 1997-06-26 Kvaerner Hymac Inc. Process for treating refiner pulp
CA2243228A1 (en) * 1997-07-17 1999-01-17 Donohue Inc. Preparation of mechanical wood pulps with reduced energy

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145246A (en) * 1976-07-19 1979-03-20 Crown Zellerbach Corporation Process for making high-strength, high-yield sulfite-modified thermomechanical pulp and a linerboard composition produced therefrom

Also Published As

Publication number Publication date
BR8005950A (pt) 1981-06-23
AU531907B2 (en) 1983-09-08
FI802654A (fi) 1981-06-18
DE3064270D1 (en) 1983-08-25
FI71779B (fi) 1986-10-31
JPS5691093A (en) 1981-07-23
MX156081A (es) 1988-06-30
EP0030778A1 (en) 1981-06-24
CA1145107A (en) 1983-04-26
NZ194407A (en) 1983-02-15
EP0030778B1 (en) 1983-07-20
AU6046080A (en) 1981-06-25

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: Q.N.S. PAPER COMPANY LIMITED