WO2015181442A1 - Procédé de réduction de la teneur en phosphore dans un effluent provenant d'un processus de production de pulpe - Google Patents

Procédé de réduction de la teneur en phosphore dans un effluent provenant d'un processus de production de pulpe Download PDF

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Publication number
WO2015181442A1
WO2015181442A1 PCT/FI2015/050349 FI2015050349W WO2015181442A1 WO 2015181442 A1 WO2015181442 A1 WO 2015181442A1 FI 2015050349 W FI2015050349 W FI 2015050349W WO 2015181442 A1 WO2015181442 A1 WO 2015181442A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
chelating agent
lignocellulosic material
effluent
production process
Prior art date
Application number
PCT/FI2015/050349
Other languages
English (en)
Inventor
Ines ELUEN
Ernesto De Los Santos
Gastón CUBAS
Luciana COSTABEL
Original Assignee
Upm-Kymmene Corporation
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 Upm-Kymmene Corporation filed Critical Upm-Kymmene Corporation
Publication of WO2015181442A1 publication Critical patent/WO2015181442A1/fr

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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
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
    • 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
    • D21C3/226—Use of compounds avoiding scale formation
    • 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
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • 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

Definitions

  • the invention relates to a method for reduc ⁇ ing the phosphorus load in effluent from a pulp pro ⁇ duction process.
  • the invention further relates to uses of at least one chelating agent.
  • the inventors have recognized the need for a method to reduce the phosphorus load in the effluent coming from the pulp production process so that less phosphorus needs to be dealt with in e.g. a waste wa ⁇ ter treatment plant.
  • Fig. 1 is a flow chart illustration of a method for reducing the phosphorus load in effluent from a pulp production process.
  • the present invention relates to a method for reducing the phosphorus load in effluent from a pulp production process, which process comprises the steps of a) digesting lignocellulosic material for forming cooked pulp, b) washing the pulp, and c) bleaching the pulp, wherein digesting the lignocellulosic material in step a) is carried out in the presence of at least one chelating agent for preventing the formation of insoluble salt containing calcium and/or magnesium and phosphorus .
  • pulp should be understood in this specification, unless otherwise stated, as a lig ⁇ nocellulosic fibrous material prepared by chemically and/or mechanically separating cellulose fibres from a lignocellulosic material. So-called kraft or sulphate processes can be used for producing pulp.
  • lignocellulosic material should be understood in as any plant derived organic matter that includes cellulose, hemicellulose, and lignin. Lignocellulosic material can originate from virgin bi- omass from trees, bushes and grass or waste biomass from various sectors like straw, sugarcane bagasse, corn stover etc. from the agricultural sector as well as saw mill and paper mill discards from the forestry sector .
  • the lignocellulosic material comprises wood chips.
  • the wood chips comprise chips of at least one hardwood species.
  • the wood chips comprise chips of at least one eucalyptus species.
  • the present invention further relates to the use of at least one chelating agent in a pulp produc ⁇ tion process, which process comprises the steps of a) digesting lignocellulosic material for forming cooked pulp, b) washing the pulp, and c) bleaching the pulp, for preventing the formation of insoluble salt con- taining calcium and/or magnesium and phosphorus.
  • This formed precipitate is then carried fur- ther through the fiberline process until it is dis ⁇ solved under the acidic or neutral conditions used e.g. in the step of bleaching the pulp. As the phos ⁇ phorus is being dissolved during the bleaching step, it will end up in the effluent received from this step.
  • a chelating agent or a complexing agent is a substance capable of forming a complex compound with another material in solution. It was found out that when using at least one chelating agent in the step of digesting the lignocellulosic material the calcium and/or magnesium will be part of the complexes formed with the chelating agent instead of forming calcium and/or magnesium phosphates.
  • the chelating agent is selected from a group consist ⁇ ing of ethylenediaminetetraacetic acid (EDTA) , 2,3- dimercaptopropanesulfonic acid (DMPS), thiamine tetra- hydrofurfuryl disulfide (TTFD) , diethylene triamine pentaacetic acid (DTPA) , tri ( carboxymethyl ) amine (NT), and 2 , 3-dimercaptosuccinic acid (DMSA) .
  • a further amount of at least one chelating agent is add ⁇ ed before step c) , and preferably in step b) .
  • FIG. 1 illustrates a method according to one embodiment of the present invention for reducing the phosphorus load in effluent from a pulp production process.
  • the pulp production process comprises, in step a) , digesting or cooking lignocellulosic material for forming cooked pulp material.
  • Step a) of digesting the used lignocellulosic material is carried out in the presence of at least one chelating agent.
  • the use of the chelating agent in step a) prevents the for ⁇ mation of insoluble salt containing calcium and/or magnesium and phosphorus, such as calcium phosphate precipitate, during the cooking step.
  • the at least one chelating agent may be used e.g. in an amount of 0,5 - 15 kg/ADt.

Landscapes

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

Abstract

L'invention concerne un procédé de réduction de la teneur en phosphore dans un effluent provenant d'un processus de production de pulpe, ledit processus comprenant les étapes suivantes : a) digestion de matériau lignocellulosique pour former une pulpe cuite ; b) lavage de la pulpe ; et c) blanchiment de la pulpe en conditions acides. La digestion de matériau lignocellulosique dans l'étape a) est réalisée en présence d'au moins un chélateur pour empêcher la formation de sel insoluble contenant du calcium et/ou du magnésium et du phosphore.
PCT/FI2015/050349 2014-05-27 2015-05-21 Procédé de réduction de la teneur en phosphore dans un effluent provenant d'un processus de production de pulpe WO2015181442A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20145479 2014-05-27
FI20145479A FI127900B (en) 2014-05-27 2014-05-27 A method for reducing phosphorus load from waste water from a pulp production process

Publications (1)

Publication Number Publication Date
WO2015181442A1 true WO2015181442A1 (fr) 2015-12-03

Family

ID=53366047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2015/050349 WO2015181442A1 (fr) 2014-05-27 2015-05-21 Procédé de réduction de la teneur en phosphore dans un effluent provenant d'un processus de production de pulpe

Country Status (3)

Country Link
FI (1) FI127900B (fr)
UY (1) UY36139A (fr)
WO (1) WO2015181442A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1529454A (en) * 1974-10-04 1978-10-18 Henkel Kgaa Process for washing textiles and compositions for carrying out same
WO1997030209A1 (fr) * 1996-02-19 1997-08-21 Kemira Chemicals Oy Procede de blanchiment de pate haut rendement
WO1997030207A1 (fr) * 1996-02-19 1997-08-21 Kemira Chemicals Oy Procede de blanchiment de pate chimique
WO2000024963A1 (fr) * 1998-10-22 2000-05-04 Ciba Specialty Chemicals Holding Inc. Enraiement du jaunissement de pulpe de papier et de papier a l'aide d'hydroxylamines et d'autres co-additifs
US20090008049A1 (en) * 2007-07-05 2009-01-08 Stantec Consulting Ltd. Non-scaling chip conditioning system for energy reduction in mechanical pulping
WO2010066026A1 (fr) * 2008-12-08 2010-06-17 Fpinnovations Rendement de mise en pâte alcaline accru pour bois de résineux avec des ions métalliques
WO2013033386A1 (fr) * 2011-08-30 2013-03-07 Cargill, Incorporated Procédés de réduction en pâte de cellulose
WO2014072584A1 (fr) * 2012-11-09 2014-05-15 Upm-Kymmene Corporation Procédé et système pour le traitement de flux liquides dans une usine de pâte chimique

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1529454A (en) * 1974-10-04 1978-10-18 Henkel Kgaa Process for washing textiles and compositions for carrying out same
WO1997030209A1 (fr) * 1996-02-19 1997-08-21 Kemira Chemicals Oy Procede de blanchiment de pate haut rendement
WO1997030207A1 (fr) * 1996-02-19 1997-08-21 Kemira Chemicals Oy Procede de blanchiment de pate chimique
WO2000024963A1 (fr) * 1998-10-22 2000-05-04 Ciba Specialty Chemicals Holding Inc. Enraiement du jaunissement de pulpe de papier et de papier a l'aide d'hydroxylamines et d'autres co-additifs
US20090008049A1 (en) * 2007-07-05 2009-01-08 Stantec Consulting Ltd. Non-scaling chip conditioning system for energy reduction in mechanical pulping
WO2010066026A1 (fr) * 2008-12-08 2010-06-17 Fpinnovations Rendement de mise en pâte alcaline accru pour bois de résineux avec des ions métalliques
WO2013033386A1 (fr) * 2011-08-30 2013-03-07 Cargill, Incorporated Procédés de réduction en pâte de cellulose
WO2014072584A1 (fr) * 2012-11-09 2014-05-15 Upm-Kymmene Corporation Procédé et système pour le traitement de flux liquides dans une usine de pâte chimique

Also Published As

Publication number Publication date
FI20145479A (fi) 2015-11-28
FI127900B (en) 2019-05-15
UY36139A (es) 2015-11-30

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