OA00889A - Delignification and bleaching of chemical and michemical cellulose pulps. - Google Patents

Delignification and bleaching of chemical and michemical cellulose pulps.

Info

Publication number
OA00889A
OA00889A OA50979A OA50979A OA00889A OA 00889 A OA00889 A OA 00889A OA 50979 A OA50979 A OA 50979A OA 50979 A OA50979 A OA 50979A OA 00889 A OA00889 A OA 00889A
Authority
OA
OAPI
Prior art keywords
michemical
delignification
bleaching
chemical
cellulose pulps
Prior art date
Application number
OA50979A
Other languages
French (fr)
Inventor
Andre Robert
Philippe Traynard
Odette Martin-Borret
Original Assignee
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 Air Liquide filed Critical Air Liquide
Publication of OA00889A publication Critical patent/OA00889A/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)
OA50979A 1963-09-19 1964-12-22 Delignification and bleaching of chemical and michemical cellulose pulps. OA00889A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR947956A FR1387853A (en) 1963-09-19 1963-09-19 Delignification and bleaching of chemical and semi-chemical cellulose pulps

Publications (1)

Publication Number Publication Date
OA00889A true OA00889A (en) 1968-03-22

Family

ID=8812657

Family Applications (1)

Application Number Title Priority Date Filing Date
OA50979A OA00889A (en) 1963-09-19 1964-12-22 Delignification and bleaching of chemical and michemical cellulose pulps.

Country Status (3)

Country Link
US (1) US3384533A (en)
FR (1) FR1387853A (en)
OA (1) OA00889A (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1404605A (en) * 1964-05-22 1965-07-02 Air Liquide Improvement in delignification of chemical cellulose pulps
FR1601408A (en) * 1967-06-20 1970-08-24
SE363138B (en) * 1968-06-13 1974-01-07 Air Liquide Sa Etude Exploit P
SE314581B (en) * 1968-10-29 1969-09-08 Mo Och Domsjoe Ab
SE335053B (en) * 1969-05-13 1971-05-10 Mo Och Domsjoe Ab
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
SE355614B (en) * 1970-05-13 1973-04-30 Mo Och Domsjoe Ab
US3716448A (en) * 1970-05-25 1973-02-13 Int Paper Co Single stage delignification and bleaching of chemical pulp with oxygen in the presence of a protector
FI52877B (en) * 1972-11-16 1977-08-31 Ahlstroem Oy
US3975232A (en) * 1973-11-19 1976-08-17 Westvaco Corporation Three stage process for pulping lignocellulosic materials including a cyanide ion containing first stage
US4338158A (en) * 1976-04-09 1982-07-06 Weyerhaeuser Company Pulping in the presence of a protector
CA1079457A (en) * 1976-09-13 1980-06-17 Robert C. Eckert Manganic ion bleaching process
US4288288A (en) * 1979-06-15 1981-09-08 Weyerhaeuser Company Apparatus for mixing chemicals into pulp at a refiner inlet
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
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
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
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
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
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
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
CA2157154A1 (en) * 1994-08-29 1996-03-01 Gordon Leary Bleaching of high-yield pulps with oxygen
FR3007044B1 (en) 2013-06-13 2016-01-15 Air Liquide PROCESS FOR TREATING CHEMICAL PAPER PASTES BY OZONE TREATMENT IN THE PRESENCE OF MAGNESIUM IONS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA553349A (en) * 1950-10-04 1958-02-18 C. Harris George Pulping process
US2811518A (en) * 1955-06-07 1957-10-29 Rayonier Inc Alkaline refining of wood pulp
CA632280A (en) * 1958-07-02 1961-12-05 Kimberly-Clark Corporation Manufacture of bleached cellulosic products resistant to brightness reversion

Also Published As

Publication number Publication date
US3384533A (en) 1968-05-21
FR1387853A (en) 1965-02-05

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