ES8504999A1 - Improved method and apparatus for oxygen delignification. - Google Patents

Improved method and apparatus for oxygen delignification.

Info

Publication number
ES8504999A1
ES8504999A1 ES526161A ES526161A ES8504999A1 ES 8504999 A1 ES8504999 A1 ES 8504999A1 ES 526161 A ES526161 A ES 526161A ES 526161 A ES526161 A ES 526161A ES 8504999 A1 ES8504999 A1 ES 8504999A1
Authority
ES
Spain
Prior art keywords
oxygen
materials
conduit
fibrous materials
steam
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
ES526161A
Other languages
Spanish (es)
Other versions
ES526161A0 (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.)
Air Products and Chemicals Inc
Black Clawson Co
Original Assignee
Air Products and Chemicals Inc
Black Clawson 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 Air Products and Chemicals Inc, Black Clawson Co filed Critical Air Products and Chemicals Inc
Publication of ES8504999A1 publication Critical patent/ES8504999A1/en
Publication of ES526161A0 publication Critical patent/ES526161A0/en
Granted 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
    • 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
    • D21C9/1068—Bleaching ; Apparatus therefor with O2

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Detergent Compositions (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

An oxygen delignification method and apparatus is disclosed of the type in which fibrous materials are pumped by a thick stock pump (12) through a conduit (14) to a substantially horizontal tubular reactor tube (18) in which the fibrous materials are mixed with oxygen, steam, and an alkaline solution is improved by the introduction of oxygen to the fibrous materials as they are pumped through the conduit (14) to the horizontal reactor tube (18) and the agitation of the fibrous materials within the conduit to mix the oxygen with the materials as they flow to the reactor tube, thereby initiating an oxygen delignification reaction within the conduit and accelerating the rate of oxygen delignification of the materials within the horizontal reactor tube (18). An alkaline solution and steam are also introduced to the fibrous materials within the conduit (14) and the materials are agitated to effect mixing of the steam and alkaline chemicals with the materials. The mixing of the fibrous materials with oxygen, alkaline solution or steam is effected by an in-line, motionless mixer (44).
ES526161A 1982-09-30 1983-09-30 PROCEDURE AND APPARATUS FOR THE CONTINUOUS DE-LIGNIFICATION BY OXYGEN OF FIBROUS MATERIALS Granted ES526161A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43148682A 1982-09-30 1982-09-30

Publications (2)

Publication Number Publication Date
ES8504999A1 true ES8504999A1 (en) 1985-05-01
ES526161A0 ES526161A0 (en) 1985-05-01

Family

ID=23712154

Family Applications (1)

Application Number Title Priority Date Filing Date
ES526161A Granted ES526161A0 (en) 1982-09-30 1983-09-30 PROCEDURE AND APPARATUS FOR THE CONTINUOUS DE-LIGNIFICATION BY OXYGEN OF FIBROUS MATERIALS

Country Status (9)

Country Link
EP (1) EP0106460A1 (en)
JP (1) JPS5982488A (en)
KR (1) KR840005846A (en)
BR (1) BR8305348A (en)
CA (1) CA1213104A (en)
ES (1) ES526161A0 (en)
FI (1) FI833514A (en)
NO (1) NO833033L (en)
ZA (1) ZA835925B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1262722A (en) * 1984-06-20 1989-11-07 Lawrence Marvin Litz Process for dispersing one fluid in another
JPS61137696U (en) * 1985-02-13 1986-08-27
AU595842B2 (en) * 1985-11-15 1990-04-12 Canadian Liquid Air Ltd. Pulp bleaching
CA1300322C (en) * 1987-06-08 1992-05-12 Derek Hornsey Method of bleaching or delignification of cellulose pulp with oxygen
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
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
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, Inc. Reactor for bleaching high consistency pulp with ozone
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
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency 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
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
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
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of bleaching high consistency pulp with ozone
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
FI922279A (en) * 1991-05-24 1992-11-25 Union Camp Patent Holding TVAOSTEGSREAKTOR FOER BLEKNING AV MASSA
SE469398B (en) * 1991-11-06 1993-06-28 Sunds Defibrator Ind Ab HEATING DEVICE FOR EXAMPLE OF CELLULOSAMASSA THEREOF APPLIED BY A MULTIPLE, SCRUBLED LOCATION, TAKEN IN A TRANSMISSION WALL
DE102008000256A1 (en) * 2008-02-08 2009-08-13 Voith Patent Gmbh Mixing and dilution arrangement
DE102008000258A1 (en) * 2008-02-08 2009-08-13 Voith Patent Gmbh mixing arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2000953A (en) * 1933-10-30 1935-05-14 Hooker Electrochemical Co Means for reacting semifluid materials
US4161421A (en) * 1977-09-13 1979-07-17 Kamyr, Inc. Method and apparatus for continuous oxygen bleaching of cellulosic pulp

Also Published As

Publication number Publication date
CA1213104A (en) 1986-10-28
FI833514A0 (en) 1983-09-29
EP0106460A1 (en) 1984-04-25
BR8305348A (en) 1984-05-08
FI833514A (en) 1984-03-31
NO833033L (en) 1984-04-02
ZA835925B (en) 1984-04-25
KR840005846A (en) 1984-11-19
ES526161A0 (en) 1985-05-01
JPS5982488A (en) 1984-05-12

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