FI50551B - - Google Patents

Info

Publication number
FI50551B
FI50551B FI1739/69A FI173969A FI50551B FI 50551 B FI50551 B FI 50551B FI 1739/69 A FI1739/69 A FI 1739/69A FI 173969 A FI173969 A FI 173969A FI 50551 B FI50551 B FI 50551B
Authority
FI
Finland
Application number
FI1739/69A
Other languages
Finnish (fi)
Other versions
FI50551C (en
Inventor
Leon Smith
David William Calvert
Andre Robert
Andre Viallet
Original Assignee
South African Pulp Paper
Air Liquide
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 South African Pulp Paper, Air Liquide filed Critical South African Pulp Paper
Publication of FI50551B publication Critical patent/FI50551B/fi
Application granted granted Critical
Publication of FI50551C publication Critical patent/FI50551C/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI691739A 1968-06-13 1969-06-11 Method for removing lignin from cellulose and bleaching cellulose FI50551C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA683771 1968-06-13

Publications (2)

Publication Number Publication Date
FI50551B true FI50551B (en) 1975-12-31
FI50551C FI50551C (en) 1976-04-12

Family

ID=25561209

Family Applications (1)

Application Number Title Priority Date Filing Date
FI691739A FI50551C (en) 1968-06-13 1969-06-11 Method for removing lignin from cellulose and bleaching cellulose

Country Status (8)

Country Link
US (1) US3657065A (en)
BR (1) BR6909697D0 (en)
ES (1) ES368284A1 (en)
FI (1) FI50551C (en)
FR (1) FR2010827A6 (en)
NO (1) NO126630B (en)
OA (1) OA136E (en)
SE (1) SE363138B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716447A (en) * 1969-12-15 1973-02-13 Dow Chemical Co Delignification and bleaching of cellulose pulp with oxygen and alkali in the presence of magnesium chloride inhibitor
US4338158A (en) * 1976-04-09 1982-07-06 Weyerhaeuser Company Pulping in the presence of a protector
US4331507A (en) * 1979-12-10 1982-05-25 Dorr-Oliver Incorporated Desilication in alkaline pulp processes
DE3110864C2 (en) * 1981-03-20 1984-10-04 Alfons K. 7513 Stutensee Herr Process for the production of an asbestos-free building material
US5302248A (en) * 1992-08-28 1994-04-12 The United States Of America As Represented By The Secretary Of Agriculture Delignification of wood pulp by vanadium-substituted polyoxometalates
US5549789A (en) * 1992-08-28 1996-08-27 The United States Of America As Represented By The Secretary Of Agriculture Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp
US20030024664A1 (en) * 2001-02-27 2003-02-06 Gibson Aileen Reyes Eop & Ep process for bleaching of chemical pulp
US7976676B2 (en) * 2006-12-18 2011-07-12 International Paper Company Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base
US7976677B2 (en) * 2006-12-18 2011-07-12 International Paper Company Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887863A (en) * 1929-11-15 1932-11-15 Arthur D Little Ind Corp Process for making pulp
US2169473A (en) * 1935-02-08 1939-08-15 Cellulose Res Corp Method of producing cellulose pulp
FR1387853A (en) * 1963-09-19 1965-02-05 Air Liquide Delignification and bleaching of chemical and semi-chemical cellulose pulps
US3382149A (en) * 1964-10-29 1968-05-07 Du Pont Bleaching of hardwood sulfite pulp with hydrogen peroxide, including pretreatment with alkali

Also Published As

Publication number Publication date
US3657065A (en) 1972-04-18
OA136E (en) 1970-12-15
ES368284A1 (en) 1971-07-16
NO126630B (en) 1973-03-05
FR2010827A6 (en) 1970-02-20
FI50551C (en) 1976-04-12
SE363138B (en) 1974-01-07
BR6909697D0 (en) 1973-05-03

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