BR9915044A - Processo para a produção de polpa a partir dematerial contendo lignocelulose - Google Patents

Processo para a produção de polpa a partir dematerial contendo lignocelulose

Info

Publication number
BR9915044A
BR9915044A BR9915044-1A BR9915044A BR9915044A BR 9915044 A BR9915044 A BR 9915044A BR 9915044 A BR9915044 A BR 9915044A BR 9915044 A BR9915044 A BR 9915044A
Authority
BR
Brazil
Prior art keywords
pulp
production
material containing
containing lignocellulose
steam
Prior art date
Application number
BR9915044-1A
Other languages
English (en)
Inventor
Mikael Svedman
Thomas Fant
Seppo Martikainen
Original Assignee
Valmet Chemical Pulping 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 Valmet Chemical Pulping Oy filed Critical Valmet Chemical Pulping Oy
Publication of BR9915044A publication Critical patent/BR9915044A/pt

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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/222—Use of compounds accelerating the pulping processes

Abstract

"PROCESSO PARA A PRODUçãO DE POLPA A PARTIR DEMATERIAL CONTENDO LIGNOCELULOSE". Um processo para aprodução de polpa usando uma deslignificação alcalina érevelado, onde o material celulósico é inicialmente tratado comvapor, e um agente de quelação é acrescentado em conjunto como tratamento por vapor. O pH final do estágio de tratamento porvapor é abaixo de 5. Os licores contendo os quelados, os assimchamados compostos de não-processo não são reciclados noprocesso de formação de polpa, mas expelidos dele paraprocessamento posterior onde os compostos de não-processo sãoeliminados.
BR9915044-1A 1998-11-06 1999-10-27 Processo para a produção de polpa a partir dematerial contendo lignocelulose BR9915044A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI982411A FI122655B (fi) 1998-11-06 1998-11-06 Eräprosessi massan valmistamiseksi
PCT/FI1999/000901 WO2000028133A1 (en) 1998-11-06 1999-10-27 Treatment of cellulosic material with a chelating agent prior to alkaline delignification

Publications (1)

Publication Number Publication Date
BR9915044A true BR9915044A (pt) 2001-10-30

Family

ID=8552862

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9915044-1A BR9915044A (pt) 1998-11-06 1999-10-27 Processo para a produção de polpa a partir dematerial contendo lignocelulose

Country Status (6)

Country Link
US (1) US6413367B1 (pt)
JP (1) JP2002529618A (pt)
AT (1) AT412405B (pt)
BR (1) BR9915044A (pt)
FI (1) FI122655B (pt)
WO (1) WO2000028133A1 (pt)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6475338B1 (en) 1996-06-05 2002-11-05 Andritz Inc. Method of minimizing transition metal ions during chemical pulping in a digester by adding chelating agent to the digester
WO2002099184A2 (en) * 2001-06-06 2002-12-12 Solutia Inc. Method and aqueous composition for the production of improved pulp
SE520874E (sv) * 2001-11-30 2012-09-21 Stfi Packforsk Ab Avlägsnande av oorganiska grundämnen från träflis före kokning till massa
SE525065C2 (sv) * 2003-04-17 2004-11-23 Kvaerner Pulping Tech Förbehandling av flis med sur vätska vid ångbasning
FI122651B (fi) * 2004-11-19 2012-05-15 Metso Paper Inc Menetelmä ja laitteisto hakkeen käsittelemiseksi
EP3002365A1 (en) 2005-05-24 2016-04-06 International Paper Company Modified kraft fibers
US7520958B2 (en) * 2005-05-24 2009-04-21 International Paper Company Modified kraft fibers
US20070131363A1 (en) * 2005-10-24 2007-06-14 Andritz Inc. Fiberline systems, processes and methods
US7824521B2 (en) * 2006-12-18 2010-11-02 University Of Maine System Board Of Trustees Process of treating a lignocellulosic material with hemicellulose pre-extraction and hemicellulose adsorption
US7842161B2 (en) * 2006-12-18 2010-11-30 The University Of Maine System Board Of Trustees Pre-extraction and solvent pulping of lignocellulosic material
DE102007022754A1 (de) * 2007-05-11 2008-11-13 Voith Patent Gmbh Verfahren zum Verringern des Schwermetallgehalts von lignocellulosischem Rohstoff
SE539706C2 (en) * 2014-11-07 2017-11-07 Valmet Oy Method for recovering hydrolyzate
SE538454C2 (en) * 2014-11-27 2016-07-12 Valmet Oy Method for displacement in batch digesters

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE416481B (sv) 1977-05-02 1981-01-05 Mo Och Domsjoe Ab Fofarande och anordning for behandling av vedflis for avlegsnande av tungmetaller och harts
US4826567A (en) 1985-08-05 1989-05-02 Interox (Societe Anonyme) Process for the delignification of cellulosic substances by pretreating with a complexing agent followed by hydrogen peroxide
US5002635A (en) * 1985-09-20 1991-03-26 Scott Paper Company Method for producing pulp using pre-treatment with stabilizers and refining
SE502667C2 (sv) 1993-07-12 1995-12-04 Kvaerner Pulping Tech Behandling av fibermaterial med komplexbildare före kokning
US5339643A (en) 1993-07-12 1994-08-23 Venturedyne Limited Method for defrosting a laboratory freezer door

Also Published As

Publication number Publication date
FI982411A0 (fi) 1998-11-06
AT412405B (de) 2005-02-25
US6413367B1 (en) 2002-07-02
ATA911199A (de) 2004-07-15
FI982411A (fi) 2000-05-07
FI122655B (fi) 2012-05-15
JP2002529618A (ja) 2002-09-10
WO2000028133A1 (en) 2000-05-18

Similar Documents

Publication Publication Date Title
RU2388441C2 (ru) Улучшенные крафтцеллюлозные волокна
BR9915044A (pt) Processo para a produção de polpa a partir dematerial contendo lignocelulose
BR9402395A (pt) Processo para a preparação de polpa a partir de material celulósico contendo lignina
BR0008237A (pt) Processo substancialmente livre de enxofre para a produção de polpa quìmica a partir de material lignocelulósico e a recuperação de substâncias quìmicas usadas no citado processo
MX9201966A (es) Proceso para blanqueo de pasta que contiene lignocelulosa.
SE7902901L (sv) Sett for blekning av oxygendelignifierad, cellulosahaltig massa med ozon
BR9007533A (pt) Processo para fabricacao de polpa alvejada e para deslignificar e alvejar um material lignoscelulosico
SE9503595D0 (sv) Method of treating cellulose pulps
ES2080427T3 (es) Procedimiento para el blanqueo de material que contiene lignocelulosa.
BR9103650A (pt) Metodo e aparelho para transformar continuamente material fibroso celulosico fragmentado em polpa kraft
FI942639A0 (fi) Menetelmä ja entsyymivalmiste selluloosamassojen käsittelemiseksi
ES554937A0 (es) Procedimiento de disgregacion con sulfito para la preparacion de celulosa a partir de materiales que contienen lignocelulosa con recuperacion de los productos quimicos de disgregacion
SE9903344D0 (sv) Pulp cooking with particular alkali profiles
BR0208115A (pt) Processo para a produçaõ de polpa
SE9401769D0 (sv) Flisinpregnering vid pappersmassakokning med sulfidiskt alkali
ZA200205752B (en) Pulping process.
ZA959830B (en) Process for reducing contamination of cellulosic liquors
SE9202338L (sv) Anvaendning av tvaettpress foer tillfoerande av alkali i en massaprocess
EP0540091A1 (en) Wash press modification for oxygen delignification process
SE9203366D0 (sv) Foerfarande vid delignifiering och/eller blekning av cellulosamassa
NO975038L (no) Behandling av masse med chelateringsmiddel og påfölgende bleking ved en pH-verdi over 9
ATE284994T1 (de) Bleichen und delignifizierung von zellstoff durch caroate/carosche säure und herstellung derselben
SE0101828D0 (sv) Method and apparatus for treating pulp

Legal Events

Date Code Title Description
B25F Entry of change of name and/or headquarter and transfer of application, patent and certif. of addition of invention: change of name on requirement
B25L Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: publication cancelled
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 7A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1888 DE 13/03/2007.