FI128968B - Selluloosamassan peroksidivalkaisu - Google Patents

Selluloosamassan peroksidivalkaisu Download PDF

Info

Publication number
FI128968B
FI128968B FI20205329A FI20205329A FI128968B FI 128968 B FI128968 B FI 128968B FI 20205329 A FI20205329 A FI 20205329A FI 20205329 A FI20205329 A FI 20205329A FI 128968 B FI128968 B FI 128968B
Authority
FI
Finland
Prior art keywords
pulp
peroxide bleaching
cellulose pulp
chelating agent
peroxide
Prior art date
Application number
FI20205329A
Other languages
English (en)
Swedish (sv)
Other versions
FI20205329A1 (fi
Inventor
Maija Rouhiainen
Sirpa Peltola
Päivi Rousu
Original Assignee
Chempolis Oy
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 Chempolis Oy filed Critical Chempolis Oy
Priority to FI20205329A priority Critical patent/FI128968B/fi
Priority to EP21721966.6A priority patent/EP4127309A1/en
Priority to PCT/FI2021/050218 priority patent/WO2021198557A1/en
Application granted granted Critical
Publication of FI128968B publication Critical patent/FI128968B/fi
Publication of FI20205329A1 publication Critical patent/FI20205329A1/fi

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
    • 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
    • D21C9/001—Modification of pulp properties
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1052—Controlling the process
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties

Landscapes

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

Abstract

Menetelmä viskositeetin kontrolloimiseksi selluloosamassan peroksidivalkaisussa, joka menetelmä käsittää selluloosamassan käsittelemisen dinatrium-3,3’-((2-etyyliheksyyli)-atsaanidiyyli)dipropionaatilla kelatoivana aineena massassa olevien metallien kelatoimiseksi; selluloosamassan peroksidivalkaisun vähintään yhdessä vaiheessa pH:ssa noin 9,5 – noin 13.

Claims (7)

Patenttivaatimukset
1. Menetelmä viskositeetin kontrolloimiseksi selluloosamassan pero- ksidivalkaisussa, joka menetelmä käsittää - selluloosamassan käsittelemisen dinatrium-3,3'-((2-etyyliheksyyli)- atsaanidiyyli)dipropionaatilla kelatoivana aineena massassa olevien metallien kelatoimiseksi, - selluloosamassan peroksidivalkaisun vähintään yhdessä vaiheessa pH:ssa noin 9,5 - noin 13.
2. Patenttivaatimuksen 1 mukainen menetelmä, jolloin sellu- loosamassaan lisätyn kelatoivan aineen määrä vaihtelee alueella noin 0,006 paino-% - noin 1 paino-% laskettuna 100 %:sena puhtaana yhdisteenä kuivan sel- luloosamassan painosta laskettuna.
3. Patenttivaatimuksen 2 mukainen menetelmä, jolloin kelatoivan ain- een määrä on 0,012 paino-% laskettuna 100 %:sena puhtaana yhdisteenä kuivan selluloosamassan painosta laskettuna.
4. Jonkin edellä olevan patenttivaatimuksen mukainen menetelmä, jol- loin käsittely kelatoivalla aineella ja peroksidivalkaisu tehdään samanaikaisesti.
5. Jonkin patenttivaatimuksen 1-3 mukainen menetelmä, jolloin ke- latoivalla aineella käsiteltyä selluloosamassaa pestään alkalisella aineella kelatoi- tujen metallien poistamiseksi massasta, minkä jälkeen seuraa ensimmäinen pero- ksidivalkaisu pH:ssa noin 10,7 - noin 13.
6. Patenttivaatimuksen 5 mukainen menetelmä, joka käsittää lisää peroksidivalkaisuvaiheita.
7. Patenttivaatimuksen 5 tai 6 mukainen menetelmä, jolloin en- o simmäisen peroksidivalkaisuvaiheen jälkeen toinen peroksidivalkaisuvaihe O tehdään pH:ssa, joka on noin 9,5 — noin 13 ja jona aikana lisätään kupariyhdistet- — ta.
x a
Q
O
N
NN
FI20205329A 2020-03-31 2020-03-31 Selluloosamassan peroksidivalkaisu FI128968B (fi)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI20205329A FI128968B (fi) 2020-03-31 2020-03-31 Selluloosamassan peroksidivalkaisu
EP21721966.6A EP4127309A1 (en) 2020-03-31 2021-03-29 Peroxide bleaching of cellulose pulp
PCT/FI2021/050218 WO2021198557A1 (en) 2020-03-31 2021-03-29 Peroxide bleaching of cellulose pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20205329A FI128968B (fi) 2020-03-31 2020-03-31 Selluloosamassan peroksidivalkaisu

Publications (2)

Publication Number Publication Date
FI128968B true FI128968B (fi) 2021-04-15
FI20205329A1 FI20205329A1 (fi) 2021-04-15

Family

ID=75436694

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20205329A FI128968B (fi) 2020-03-31 2020-03-31 Selluloosamassan peroksidivalkaisu

Country Status (3)

Country Link
EP (1) EP4127309A1 (fi)
FI (1) FI128968B (fi)
WO (1) WO2021198557A1 (fi)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402335B2 (en) * 1989-06-06 2001-03-14 Eka Chemicals AB Process for bleaching lignocellulose-containing pulps
SE468355B (sv) 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon
SE501985C2 (sv) * 1993-11-05 1995-07-03 Sunds Defibrator Ind Ab Förfarande för avskiljning av metalljoner från massa i samband med blekning av massan
SE504340E (sv) 1995-05-22 1999-08-09 Mo Och Domsjoe Ab Förfarande för delignifiering/blekning av lignininnehållande cellulosamassa
US6706143B1 (en) 1996-03-19 2004-03-16 International Paper Company Minimizing chlorinated organics in pulp bleaching processes
FI105214B (fi) 1997-11-13 2000-06-30 Kemira Chemicals Oy Tehostettu kemiallisen massan valkaisumenetelmä
EP1375734A1 (en) * 2002-06-17 2004-01-02 SCA Hygiene Products GmbH Bleached, strong sulfite chemical pulp, a process for the production thereof and products derived therefrom
US20080110584A1 (en) * 2006-11-15 2008-05-15 Caifang Yin Bleaching process with at least one extraction stage

Also Published As

Publication number Publication date
EP4127309A1 (en) 2023-02-08
FI20205329A1 (fi) 2021-04-15
WO2021198557A1 (en) 2021-10-07

Similar Documents

Publication Publication Date Title
EP1095184B1 (en) Method of producing lignocellulosic pulp from non-woody species
JP4499280B2 (ja) 過酸による化学パルプの漂白
FI102301B (fi) Menetelmä selluloosamassojen käsittelemiseksi
CA2270524C (en) Method of producing pulp using single-stage cooking with formic acid and washing with performic acid
US4871423A (en) Enhanced dithionite bleaching
WO2005103135A1 (en) Methods to enhance brightness of pulp and optimize use of bleaching chemicals
US6413367B1 (en) Treatment of cellulosic material with a chelating agent prior to alkaline delignification
FI128968B (fi) Selluloosamassan peroksidivalkaisu
US5296100A (en) H2 O2 /alkaline bleaching of wood pulps
EP0250422B1 (en) Process for preparing bleached pulp from lignocellulosic raw material
RU2439232C2 (ru) Способ отбеливания бумажной целлюлозной массы путем конечной обработки озоном при высокой температуре
US20040026051A1 (en) Environmentally-friendly fiberline for producing bleached chemical pulp
AU2003216028B2 (en) Process for bleaching lignocellulose-containing non-wood pulp
EP0464110B1 (en) Bleaching process for the production of high bright pulps
EP0670929B2 (en) Process for bleaching of lignocellulose-containing pulp
CA1111607A (en) Pulping procedure
EP1996762B1 (en) Near-neutral chlorine dioxide bleaching of pulp
WO2019165324A1 (en) Novel dissolving wood pulps and methods of making and using the same
RU2097462C1 (ru) Способ делигнификации и отбеливания лигноцеллюлозосодержащей пульпы
WO2009069143A2 (en) Synergistic composition and a process for biobleaching of ligno cellulosic pulp
WO2021209586A1 (en) Delignification process
Quintana et al. New strategies to bleach dissolving pulps using enzymatic treatments

Legal Events

Date Code Title Description
FG Patent granted

Ref document number: 128968

Country of ref document: FI

Kind code of ref document: B