FR1404605A - Improvement in delignification of chemical cellulose pulps - Google Patents

Improvement in delignification of chemical cellulose pulps

Info

Publication number
FR1404605A
FR1404605A FR975380A FR975380A FR1404605A FR 1404605 A FR1404605 A FR 1404605A FR 975380 A FR975380 A FR 975380A FR 975380 A FR975380 A FR 975380A FR 1404605 A FR1404605 A FR 1404605A
Authority
FR
France
Prior art keywords
delignification
improvement
chemical cellulose
cellulose pulps
pulps
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
FR975380A
Other languages
French (fr)
Inventor
Paul Rerolle
Claude Richard
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to FR975380A priority Critical patent/FR1404605A/en
Priority to US455474A priority patent/US3423282A/en
Priority to SE6648/65A priority patent/SE319682B/xx
Application granted granted Critical
Publication of FR1404605A publication Critical patent/FR1404605A/en
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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FR975380A 1964-05-22 1964-05-22 Improvement in delignification of chemical cellulose pulps Expired FR1404605A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR975380A FR1404605A (en) 1964-05-22 1964-05-22 Improvement in delignification of chemical cellulose pulps
US455474A US3423282A (en) 1964-05-22 1965-05-13 Delignification of chemical cellulose pulps with oxygen and then chlorine
SE6648/65A SE319682B (en) 1964-05-22 1965-05-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR975380A FR1404605A (en) 1964-05-22 1964-05-22 Improvement in delignification of chemical cellulose pulps

Publications (1)

Publication Number Publication Date
FR1404605A true FR1404605A (en) 1965-07-02

Family

ID=8830574

Family Applications (1)

Application Number Title Priority Date Filing Date
FR975380A Expired FR1404605A (en) 1964-05-22 1964-05-22 Improvement in delignification of chemical cellulose pulps

Country Status (3)

Country Link
US (1) US3423282A (en)
FR (1) FR1404605A (en)
SE (1) SE319682B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071947A1 (en) * 1969-12-19 1971-09-24 Canadian Ind

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE334286B (en) * 1968-12-05 1971-04-19 Mo Och Domsjoe Ab
US3830688A (en) * 1970-10-23 1974-08-20 Skogsaegarnas Ind Ab Method of reducing the discharge of waste products from pulp mills
FI52877B (en) * 1972-11-16 1977-08-31 Ahlstroem Oy
US4081317A (en) * 1973-12-18 1978-03-28 Hooker Chemicals & Plastics Corporation Process for the reduction of effluent color from a cellulosic pulp bleaching sequence
FR2255418B1 (en) * 1973-12-21 1976-05-07 Europeen Cellulose
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5211811A (en) * 1989-02-15 1993-05-18 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5217574A (en) * 1989-02-15 1993-06-08 Union Camp Patent Holdings Inc. Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
SE466060C (en) 1990-02-13 1995-07-11 Moelnlycke Ab Absorbent chemitermomechanical mass and preparation thereof
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
NZ237019A (en) * 1990-02-19 1992-11-25 Amcor Ltd Bleaching paper pulp by initially treating with oxygen and/or hydrogen peroxide and subsequently treating with a bleaching agent without intervening washing steps
AU642971B2 (en) * 1990-02-19 1993-11-04 Paper Australia Pty Ltd Bleaching of paper pulp
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration
SE532370C2 (en) * 2008-02-28 2009-12-29 Metso Paper Inc Method of bleaching a pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA569029A (en) * 1959-01-13 L. Mitchell Reid Alkaline refining of wood pulp
US2147618A (en) * 1936-04-01 1939-02-14 West Virginia Pulp & Paper Com Method of bleaching pulp
FR1387853A (en) * 1963-09-19 1965-02-05 Air Liquide Delignification and bleaching of chemical and semi-chemical cellulose pulps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2071947A1 (en) * 1969-12-19 1971-09-24 Canadian Ind

Also Published As

Publication number Publication date
SE319682B (en) 1970-01-19
US3423282A (en) 1969-01-21

Similar Documents

Publication Publication Date Title
FR1404605A (en) Improvement in delignification of chemical cellulose pulps
OA00889A (en) Delignification and bleaching of chemical and michemical cellulose pulps.
FR1441787A (en) Pulp bleaching process
FR1375278A (en) Improvements in the manufacture of cellulose pulps
FR1372871A (en) Improvements in the production of pulp from cellulosic materials
FR1461003A (en) Process for bleaching low cellulose wood pulp
FR1443743A (en) Cellulose pulp bleaching process
FR1407286A (en) Cellulose pulp bleaching process
DK129952B (en) Process for bleaching fibrous material of natural cellulose.
FR1511478A (en) Pulp scrubber
FR1393492A (en) Pulp bleaching improvement
FR1465295A (en) Bleaching of crude fibrous cellulose pulp
FR93286E (en) Delignification and bleaching of chemical and semi-chemical cellulose pastes.
FR1201712A (en) Cellulose pulp bleaching improvements
FR1474833A (en) Pulp bleaching process
FR1414532A (en) Grape vat
FR1419841A (en) Semi-chemical pulps
FR1382834A (en) Improvements to the production of swollen yarns
FR1489262A (en) Bleaching of wood pulp
FR1437742A (en) Pulp press
FR1434436A (en) Continuous pulp production
FR1333675A (en) Improvements in the production of cellulosic filaments
FR1508780A (en) Pulp pounding process
CH462740A (en) Fabric containing cellulose fibers
FR1528174A (en) Obtaining sodium carbonate from cellulose treatment liquors