GB929731A - Pulp bleaching - Google Patents

Pulp bleaching

Info

Publication number
GB929731A
GB929731A GB38149/59A GB3814959A GB929731A GB 929731 A GB929731 A GB 929731A GB 38149/59 A GB38149/59 A GB 38149/59A GB 3814959 A GB3814959 A GB 3814959A GB 929731 A GB929731 A GB 929731A
Authority
GB
United Kingdom
Prior art keywords
added
wood chips
refiner
refiners
chips
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
GB38149/59A
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.)
Bauer Brothers Co
Original Assignee
Bauer Brothers Co
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 Bauer Brothers Co filed Critical Bauer Brothers Co
Publication of GB929731A publication Critical patent/GB929731A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

In a process for producing bleached pulp in a pulp refining procedure, wood chips are passed in a fluid through a succession of refiners for staged reduction of the chips to a desired pulp consistency and bleaching agents, e.g. hydrogen peroxide, are added to the wood chips at selected refiners to effect simultaneous refining and bleaching of the wood chips. The wood chips in water may be passed through a series of four refiners of the disc mill type, a sequestering agent, e.g. sodium tripolyphosphate, being added to the chips in the first refiner, hydrogen peroxide solution containing magnesium sulphate being added to the third refiner and sodium silicate and sodium hydroxide solution which softens the wood chips, being added to the fourth refiner. Alternatively the wood chips may be passed through two refiners and a washer, the hydrogen peroxide being added to the first refiner and sodium hydroxide being added to the first or second refiner.ALSO:In a process for producing bleached pulp in a pulp refining procedure, wood chips are passed in a fluid through a succession of refiners for staged reduction of the chips to a desired pulp consistency and bleaching agents, e.g. hydrogen peroxide, are added to the wood chips at selected refiners to effect simultaneous refining and bleaching of the wood chips. The wood chips in water may be passed through a series of four refiners of the disc mill type, a sequestering agent, e.g. sodiumtripolyphosphate, being added to the chips in the first refined, hydrogen peroxide solution containing magnesium sulphate being added to the third refiner and sodium silicate and sodium hydroxide solution which softens the wood chips being added to the fourth refiner. Alternatively the wood chips may be passed through two refiners and a washer, the hydrogen peroxide being added to the first refiner and the sodium hydroxide being added to the first or second refiner.
GB38149/59A 1958-11-24 1959-11-10 Pulp bleaching Expired GB929731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US775838A US3023140A (en) 1958-11-24 1958-11-24 Pulp bleaching

Publications (1)

Publication Number Publication Date
GB929731A true GB929731A (en) 1963-06-26

Family

ID=25105670

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38149/59A Expired GB929731A (en) 1958-11-24 1959-11-10 Pulp bleaching

Country Status (2)

Country Link
US (1) US3023140A (en)
GB (1) GB929731A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497671A1 (en) * 1991-01-31 1992-08-05 Societe Francaise Hoechst Method of refining a paper pulp
CN110886119A (en) * 2019-11-14 2020-03-17 广西大学 Method for preparing high-whiteness paper pulp by taking eucommia ulmoides leaf forest mode branches as raw materials

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3130116A (en) * 1960-08-24 1964-04-21 Fmc Corp Process for grinding or pulping wood
US3186899A (en) * 1962-09-11 1965-06-01 Minnesota And Outario Paper Co Groundwood pulp
SE303088B (en) * 1963-05-31 1968-08-12 Defibrator Ab
US3284283A (en) * 1964-02-17 1966-11-08 Fmc Corp Production of wood pulps including treatment of cellulosic fibers with bisulfite ion followed by alkali metal borohydride
US3467574A (en) * 1966-06-14 1969-09-16 Crown Zellerbach Corp Refiner bleaching of high yield pulps
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
US3819470A (en) * 1971-06-18 1974-06-25 Scott Paper Co Modified cellulosic fibers and method for preparation thereof
BE792031A (en) * 1971-12-14 1973-03-16 Mo Och Domsjoe Ab PROCESS FOR THE PREPARATION OF MECHANICAL PULPS
US4022965A (en) * 1975-01-13 1977-05-10 Crown Zellerbach Corporation Process for producing reactive, homogeneous, self-bondable lignocellulose fibers
SE432118B (en) * 1975-02-26 1984-03-19 Moelnlycke Ab MECHANICAL FLUFF MASS AND SET FOR PREPARATION THEREOF
SE416481B (en) * 1977-05-02 1981-01-05 Mo Och Domsjoe Ab METHOD AND DEVICE FOR TREATMENT OF WOOD TIP FOR REMOVAL OF HEAVY METALS AND RESIN
US4410397A (en) * 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
SE456826B (en) * 1986-04-18 1988-11-07 Svenska Traeforskningsinst SET TO REDUCE ENERGY CONSUMPTION BY REFINING CELLULOSALLY MATERIAL
US4731161A (en) * 1986-07-31 1988-03-15 Union Camp Corporation Semibleaching liquor for Kraft paper products
US6159335A (en) * 1997-02-21 2000-12-12 Buckeye Technologies Inc. Method for treating pulp to reduce disintegration energy
US6899790B2 (en) * 2000-03-06 2005-05-31 Georgia-Pacific Corporation Method of providing papermaking fibers with durable curl
US6627041B2 (en) * 2000-03-06 2003-09-30 Georgia-Pacific Corporation Method of bleaching and providing papermaking fibers with durable curl
US7001484B2 (en) * 2000-05-04 2006-02-21 University Of New Brunswick Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent
US6881299B2 (en) * 2001-05-16 2005-04-19 North American Paper Corporation Refiner bleaching with magnesium oxide and hydrogen peroxide
US20040200586A1 (en) * 2002-07-19 2004-10-14 Martin Herkel Four stage alkaline peroxide mechanical pulping
WO2003008703A1 (en) * 2001-07-19 2003-01-30 Andritz Inc. Four stage alkaline peroxide mechanical pulping
US7384502B2 (en) * 2002-12-24 2008-06-10 Nippon Paper Industries Co., Ltd. Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness
US8282773B2 (en) * 2007-12-14 2012-10-09 Andritz Inc. Method and system to enhance fiber development by addition of treatment agent during mechanical pulping
CA2810920C (en) * 2010-09-17 2017-08-15 Titan Wood Limited Treatment of wood pieces

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1850832A (en) * 1925-06-13 1932-03-22 Insulite Co Process of separating wood fibers
US1775405A (en) * 1927-11-02 1930-09-09 Neumann John Art of paper making
US2125634A (en) * 1937-03-29 1938-08-02 Oxford Paper Co Method of bleaching pulp or paper webs
US2187016A (en) * 1939-04-19 1940-01-16 Paper Patents Co Process of treating ground wood
US2435566A (en) * 1944-10-16 1948-02-10 West Virginia Pulp & Paper Co Peroxide bleaching of ground wood
US2413583A (en) * 1945-08-11 1946-12-31 St Regis Paper Co Bleaching of groundwood
US2465738A (en) * 1945-12-22 1949-03-29 Buffalo Electro Chem Co Method of bleaching mechanical wood fibers
US2492047A (en) * 1946-03-30 1949-12-20 Du Pont Bleaching wood pulp
US2707144A (en) * 1951-08-08 1955-04-26 Scott Paper Co Method of bleaching mechanically disintegrated wood pulp
US2717195A (en) * 1954-08-02 1955-09-06 Jackson And Church Company Method for treating a fibrous material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497671A1 (en) * 1991-01-31 1992-08-05 Societe Francaise Hoechst Method of refining a paper pulp
FR2672315A1 (en) * 1991-01-31 1992-08-07 Hoechst France NEW PROCESS FOR REFINING PULP.
CN110886119A (en) * 2019-11-14 2020-03-17 广西大学 Method for preparing high-whiteness paper pulp by taking eucommia ulmoides leaf forest mode branches as raw materials

Also Published As

Publication number Publication date
US3023140A (en) 1962-02-27

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