FI93867B - Process for treating pulp with ozone and reactor for use of the process - Google Patents

Process for treating pulp with ozone and reactor for use of the process

Info

Publication number
FI93867B
FI93867B FI884267A FI884267A FI93867B FI 93867 B FI93867 B FI 93867B FI 884267 A FI884267 A FI 884267A FI 884267 A FI884267 A FI 884267A FI 93867 B FI93867 B FI 93867B
Authority
FI
Finland
Prior art keywords
ozone
carrier gas
moisture content
brought
reactor
Prior art date
Application number
FI884267A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI884267A (en
FI884267A0 (en
FI93867C (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 FI884267A0 publication Critical patent/FI884267A0/en
Publication of FI884267A publication Critical patent/FI884267A/en
Application granted granted Critical
Publication of FI93867B publication Critical patent/FI93867B/en
Publication of FI93867C publication Critical patent/FI93867C/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

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>
FI884267A 1987-09-17 1988-09-16 A method for treating pulps with ozone and a reactor for applying this method FI93867C (en)

Applications Claiming Priority (2)

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
FR8712890 1987-09-17

Publications (4)

Publication Number Publication Date
FI884267A0 FI884267A0 (en) 1988-09-16
FI884267A FI884267A (en) 1989-03-18
FI93867B true FI93867B (en) 1995-02-28
FI93867C FI93867C (en) 1995-06-12

Family

ID=9354988

Family Applications (1)

Application Number Title Priority Date Filing Date
FI884267A FI93867C (en) 1987-09-17 1988-09-16 A method for treating pulps with ozone and a reactor for applying this method

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) DE308314T1 (en)
ES (1) ES2035339T3 (en)
FI (1) FI93867C (en)
FR (1) FR2620744A1 (en)
NO (1) NO174781C (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, 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
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
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
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
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of 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
FI922279A (en) * 1991-05-24 1992-11-25 Union Camp Patent Holding TVAOSTEGSREAKTOR FOER BLEKNING AV MASSA
FI925558A (en) * 1992-04-22 1993-10-23 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER BLEKNING AV MASSA
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
WO1996005365A1 (en) * 1994-08-11 1996-02-22 Beloit Technologies, Inc. Means for gas-sealingly conveying shredded pulp
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
ES2035339T3 (en) 1993-04-16
ATE82340T1 (en) 1992-11-15
DE3875893T2 (en) 1993-03-18
BR8804806A (en) 1989-04-25
FI884267A (en) 1989-03-18
JP2731822B2 (en) 1998-03-25
NO174781C (en) 1994-07-06
JPH0197290A (en) 1989-04-14
FI884267A0 (en) 1988-09-16
NO884128D0 (en) 1988-09-16
FR2620744A1 (en) 1989-03-24
FI93867C (en) 1995-06-12
EP0308314B1 (en) 1992-11-11
CA1314664C (en) 1993-03-23
NO884128L (en) 1989-03-20
DE3875893D1 (en) 1992-12-17
DE308314T1 (en) 1989-10-05
NO174781B (en) 1994-03-28
EP0308314A1 (en) 1989-03-22

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Legal Events

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BB Publication of examined application
MM Patent lapsed

Owner name: DEGREMONT