ES368284A1 - Un metodo de deslignificar y blanquear una pasta de celulo-sa. - Google Patents

Un metodo de deslignificar y blanquear una pasta de celulo-sa.

Info

Publication number
ES368284A1
ES368284A1 ES368284A ES368284A ES368284A1 ES 368284 A1 ES368284 A1 ES 368284A1 ES 368284 A ES368284 A ES 368284A ES 368284 A ES368284 A ES 368284A ES 368284 A1 ES368284 A1 ES 368284A1
Authority
ES
Spain
Prior art keywords
magnesium
alkaline earth
earth metal
protector
hydroxide
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES368284A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOUTH AFRICAN PULP PAPER
Original Assignee
SOUTH AFRICAN PULP 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 SOUTH AFRICAN PULP PAPER filed Critical SOUTH AFRICAN PULP PAPER
Publication of ES368284A1 publication Critical patent/ES368284A1/es
Expired legal-status Critical Current

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)
ES368284A 1968-06-13 1969-06-12 Un metodo de deslignificar y blanquear una pasta de celulo-sa. Expired ES368284A1 (es)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
ES368284A1 true ES368284A1 (es) 1971-07-16

Family

ID=25561209

Family Applications (1)

Application Number Title Priority Date Filing Date
ES368284A Expired ES368284A1 (es) 1968-06-13 1969-06-12 Un metodo de deslignificar y blanquear una pasta de celulo-sa.

Country Status (8)

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

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 (de) * 1981-03-20 1984-10-04 Alfons K. 7513 Stutensee Herr Verfahren zur Herstellung eines asbestfreien Baumaterials
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 (fr) * 1963-09-19 1965-02-05 Air Liquide Délignification et blanchiment des pâtes cellulosiques chimiques et mi-chimiques
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
SE363138B (es) 1974-01-07
BR6909697D0 (pt) 1973-05-03
NO126630B (es) 1973-03-05
FI50551B (es) 1975-12-31
FR2010827A6 (es) 1970-02-20
OA136E (es) 1970-12-15
FI50551C (fi) 1976-04-12
US3657065A (en) 1972-04-18

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