DE3875893D1 - METHOD FOR TREATING OZONE OF LIGNOCELLULOSE MATERIALS, IN PARTICULAR PAPER DIMENSIONS, AND REACTOR FOR CARRYING OUT THE METHOD. - Google Patents

METHOD FOR TREATING OZONE OF LIGNOCELLULOSE MATERIALS, IN PARTICULAR PAPER DIMENSIONS, AND REACTOR FOR CARRYING OUT THE METHOD.

Info

Publication number
DE3875893D1
DE3875893D1 DE8888402296T DE3875893T DE3875893D1 DE 3875893 D1 DE3875893 D1 DE 3875893D1 DE 8888402296 T DE8888402296 T DE 8888402296T DE 3875893 T DE3875893 T DE 3875893T DE 3875893 D1 DE3875893 D1 DE 3875893D1
Authority
DE
Germany
Prior art keywords
ozone
carrier gas
reactor
carrying
particular paper
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 - Lifetime
Application number
DE8888402296T
Other languages
German (de)
Other versions
DE3875893T2 (en
Inventor
Christian Coste
Pierre Jan
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.)
Suez International SAS
Original Assignee
Degremont SA
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 SA filed Critical Degremont SA
Publication of DE3875893D1 publication Critical patent/DE3875893D1/en
Application granted granted Critical
Publication of DE3875893T2 publication Critical patent/DE3875893T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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>
DE8888402296T 1987-09-17 1988-09-12 METHOD FOR TREATING OZONE OF LIGNOCELLULOSE MATERIALS, IN PARTICULAR PAPER DIMENSIONS, AND REACTOR FOR CARRYING OUT THE METHOD. Expired - Fee Related DE3875893T2 (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 (2)

Publication Number Publication Date
DE3875893D1 true DE3875893D1 (en) 1992-12-17
DE3875893T2 DE3875893T2 (en) 1993-03-18

Family

ID=9354988

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8888402296T Expired - Fee Related DE3875893T2 (en) 1987-09-17 1988-09-12 METHOD FOR TREATING OZONE OF LIGNOCELLULOSE MATERIALS, IN PARTICULAR PAPER DIMENSIONS, AND REACTOR FOR CARRYING OUT THE METHOD.
DE198888402296T Pending DE308314T1 (en) 1987-09-17 1988-09-12 METHOD FOR TREATING OZONE OF LIGNOCELLULOSE MATERIALS, IN PARTICULAR PAPER DIMENSIONS, AND REACTOR FOR CARRYING OUT THE METHOD.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE198888402296T Pending DE308314T1 (en) 1987-09-17 1988-09-12 METHOD FOR TREATING OZONE OF LIGNOCELLULOSE MATERIALS, IN PARTICULAR PAPER DIMENSIONS, AND REACTOR FOR CARRYING OUT THE 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) DE3875893T2 (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
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
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
US5188708A (en) 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, 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
US5164043A (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
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
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
ATE156539T1 (en) * 1991-05-24 1997-08-15 Union Camp Patent Holding TWO-STAGE REACTOR FOR BLEACHING PULP AND METHOD FOR BLEACHING WITH OZONE
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
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
BR8804806A (en) 1989-04-25
ES2035339T3 (en) 1993-04-16
NO884128D0 (en) 1988-09-16
NO174781C (en) 1994-07-06
JP2731822B2 (en) 1998-03-25
FI93867B (en) 1995-02-28
EP0308314A1 (en) 1989-03-22
NO884128L (en) 1989-03-20
EP0308314B1 (en) 1992-11-11
FR2620744A1 (en) 1989-03-24
DE308314T1 (en) 1989-10-05
FI884267A (en) 1989-03-18
FI884267A0 (en) 1988-09-16
FI93867C (en) 1995-06-12
NO174781B (en) 1994-03-28
CA1314664C (en) 1993-03-23
DE3875893T2 (en) 1993-03-18
ATE82340T1 (en) 1992-11-15
JPH0197290A (en) 1989-04-14

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: GROSSE, BOCKHORNI, SCHUMACHER, 81476 MUENCHEN

8339 Ceased/non-payment of the annual fee