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NO174781C - Process and reactor for treating pulp with ozone - Google Patents

Process and reactor for treating pulp with ozone

Info

Publication number
NO174781C
NO174781C NO884128A NO884128A NO174781C NO 174781 C NO174781 C NO 174781C NO 884128 A NO884128 A NO 884128A NO 884128 A NO884128 A NO 884128A NO 174781 C NO174781 C NO 174781C
Authority
NO
Norway
Prior art keywords
ozone
carrier gas
reactor
moisture content
brought
Prior art date
Application number
NO884128A
Other languages
Norwegian (no)
Other versions
NO884128D0 (en
NO884128L (en
NO174781B (en
Inventor
Christian Coste
Pierre Jan
Original Assignee
Degremont
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 Degremont filed Critical Degremont
Publication of NO884128D0 publication Critical patent/NO884128D0/en
Publication of NO884128L publication Critical patent/NO884128L/en
Publication of NO174781B publication Critical patent/NO174781B/en
Publication of NO174781C publication Critical patent/NO174781C/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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Fertilizers (AREA)

Abstract

Process for the ozone treatment of lignocellulosic material, especially of paper pulp, according to which the material is brought to the desired moisture content beforehand in order that the ozonation reaction may take place under optimum conditions, characterised in that the material brought to the desired moisture content is reduced to a sufficient state of division to ensure an interface of maximum value between the ozone-carrier gas and the fibrous solid and in that the said material is then subjected to ozonation by means of a carrier gas in which the ozone concentration is between 4 and 10% on a mass basis in relation to the said carrier gas. <IMAGE>
NO884128A 1987-09-17 1988-09-16 Process and reactor for treating pulp with ozone NO174781C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8712890A FR2620744A1 (en) 1987-09-17 1987-09-17 PROCESS FOR THE OZONE TREATMENT OF LIGNO-CELLULOSIC MATERIALS, IN PARTICULAR PAPER PULP AND REACTOR FOR THE IMPLEMENTATION OF SAID METHOD

Publications (4)

Publication Number Publication Date
NO884128D0 NO884128D0 (en) 1988-09-16
NO884128L NO884128L (en) 1989-03-20
NO174781B NO174781B (en) 1994-03-28
NO174781C true NO174781C (en) 1994-07-06

Family

ID=9354988

Family Applications (1)

Application Number Title Priority Date Filing Date
NO884128A NO174781C (en) 1987-09-17 1988-09-16 Process and reactor for treating pulp with ozone

Country Status (10)

Country Link
EP (1) EP0308314B1 (en)
JP (1) JP2731822B2 (en)
AT (1) ATE82340T1 (en)
BR (1) BR8804806A (en)
CA (1) CA1314664C (en)
DE (2) DE3875893T2 (en)
ES (1) ES2035339T3 (en)
FI (1) FI93867C (en)
FR (1) FR2620744A1 (en)
NO (1) NO174781C (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
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
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
FI89516B (en) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande Foer blekning av cellulosamassa med Otson
AT395180B (en) * 1989-08-16 1992-10-12 Andritz Ag Maschf METHOD FOR CRUSHING MATERIALS AND SYSTEM FOR IMPLEMENTING IT
US5164044A (en) 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
US5164043A (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
AR245799A1 (en) * 1990-10-26 1994-02-28 Union Camp Patent Holding Pulp bleaching reactor and method
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
EP0492040A1 (en) * 1990-12-21 1992-07-01 Kamyr, Inc. Tumbling ozone reactor for paper pulp
EP0492039A1 (en) * 1990-12-27 1992-07-01 Kamyr, Inc. Pneumatic reactor ozone bleaching of paper pulp
US5087326A (en) * 1991-02-20 1992-02-11 Union Camp Patent Holding, Inc. Rotating pulp bleaching reactor having inner and outer shells and lifting means on the interior surface of the inner shell
US5411633A (en) * 1991-04-30 1995-05-02 Kamyr, Inc. Medium consistency pulp ozone bleaching
ES2106848T5 (en) * 1991-05-24 2001-09-01 Union Camp Patent Holding METHOD OF WHITENING WITH OZONE.
FI925558L (en) * 1992-04-22 1993-10-23 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER BLEKNING AV MASS
US5387317A (en) * 1993-01-28 1995-02-07 The Mead Corporation Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps
US5810973A (en) * 1993-09-21 1998-09-22 Beloit Technologies, Inc. Apparatus for producing small particles from high consistency wood pulp
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
JP2896812B2 (en) * 1994-08-11 1999-05-31 ベロイト・テクノロジーズ・インコーポレイテッド High concentration pulp transporter and transport method
US5944952A (en) * 1995-07-26 1999-08-31 Beloit Technologies, Inc. Method for bleaching high consistency pulp with a gaseous bleaching reagent
US6077396A (en) * 1997-05-16 2000-06-20 Lariviere; Christopher J. Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent
US6174409B1 (en) 1997-09-19 2001-01-16 American Air Liquide Inc. Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process
SE514416C2 (en) * 1999-06-10 2001-02-19 Valmet Fibertech Ab Method and system for gas-tight feed of pulp to an ozone bleaching reactor
FR2811320B1 (en) * 2000-07-06 2002-08-23 Adir NOVEL ALPHA CRYSTALLINE FORM OF TERT-BUTYLAMINE SALT OF PERINDOPRIL, PREPARATION METHOD THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE SAME

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1591070A (en) * 1925-02-27 1926-07-06 Robert B Wolf Bleaching apparatus
US2013115A (en) * 1931-09-21 1935-09-03 Thorne Carl Busch Process and apparatus for the refining of pulp
US2466633A (en) * 1948-05-26 1949-04-05 James M Daily Method of bleaching cellulosic pulp
FR1441787A (en) * 1965-04-30 1966-06-10 Progil Pulp bleaching process
NO137651C (en) * 1975-10-31 1978-03-29 Myrens Verksted As PROCEDURE AND APPARATUS FOR CONTINUOUS TREATMENT OF FINDEL FIBER MATERIAL OR CELLULOSIZED MASS WITH GAS WITHOUT COVER.
JPS5319404A (en) * 1976-04-19 1978-02-22 Toyo Pulp Co Ltd Process and apparatus for treating cellulose material
CA1090510A (en) * 1976-06-02 1980-12-02 Arthur W. Kempf Delignification and bleaching of a lignocellulosic pulp slurry with ozone
JPS5536313A (en) * 1978-08-30 1980-03-13 Hokusan Kk Production of mechanical pulp
US4363697A (en) * 1979-12-03 1982-12-14 The Black Clawson Company Method for medium consistency oxygen delignification of pulp
FR2474550A1 (en) * 1980-01-24 1981-07-31 Scott Paper Co Two stage pulp bleaching process - by ozone bleaching of acidified pulp at high consistency, diluting to lower consistency, and making alkaline for peroxy bleaching
FR2609067B1 (en) * 1986-12-31 1990-06-15 Beghin Say Sa PROCESS FOR THE OZONE TREATMENT OF A CELLULOSIC PASTE

Also Published As

Publication number Publication date
NO884128D0 (en) 1988-09-16
FI884267A0 (en) 1988-09-16
NO884128L (en) 1989-03-20
DE3875893T2 (en) 1993-03-18
JP2731822B2 (en) 1998-03-25
FI93867C (en) 1995-06-12
ATE82340T1 (en) 1992-11-15
JPH0197290A (en) 1989-04-14
CA1314664C (en) 1993-03-23
FR2620744A1 (en) 1989-03-24
FI93867B (en) 1995-02-28
NO174781B (en) 1994-03-28
EP0308314A1 (en) 1989-03-22
BR8804806A (en) 1989-04-25
DE308314T1 (en) 1989-10-05
FI884267L (en) 1989-03-18
DE3875893D1 (en) 1992-12-17
EP0308314B1 (en) 1992-11-11
ES2035339T3 (en) 1993-04-16

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