FI20075317A - Förfarande för framställning av ditionit - Google Patents

Förfarande för framställning av ditionit Download PDF

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Publication number
FI20075317A
FI20075317A FI20075317A FI20075317A FI20075317A FI 20075317 A FI20075317 A FI 20075317A FI 20075317 A FI20075317 A FI 20075317A FI 20075317 A FI20075317 A FI 20075317A FI 20075317 A FI20075317 A FI 20075317A
Authority
FI
Finland
Prior art keywords
dithionite
solution
preparation
rise
prevented
Prior art date
Application number
FI20075317A
Other languages
English (en)
Finnish (fi)
Other versions
FI20075317A0 (sv
FI121114B (sv
Inventor
Risto Rahkola
Original Assignee
Kemira Oyj
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 Kemira Oyj filed Critical Kemira Oyj
Priority to FI20075317A priority Critical patent/FI121114B/sv
Publication of FI20075317A0 publication Critical patent/FI20075317A0/sv
Priority to CA2684688A priority patent/CA2684688C/en
Priority to EP08761628A priority patent/EP2150489B1/en
Priority to PCT/FI2008/050225 priority patent/WO2008135631A1/en
Priority to AT08761628T priority patent/ATE521571T1/de
Priority to US12/598,457 priority patent/US7993622B2/en
Priority to CL2008001252A priority patent/CL2008001252A1/es
Publication of FI20075317A publication Critical patent/FI20075317A/sv
Application granted granted Critical
Publication of FI121114B publication Critical patent/FI121114B/sv

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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • D21C9/1089—Bleaching ; Apparatus therefor with reducing compounds with dithionites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/64—Thiosulfates; Dithionites; Polythionates
    • C01B17/66—Dithionites or hydrosulfites (S2O42-)
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general
    • C01D7/07—Preparation from the hydroxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Saccharide Compounds (AREA)
  • Compounds Of Unknown Constitution (AREA)
FI20075317A 2007-05-04 2007-05-04 Förfarande för framställning av ditionit FI121114B (sv)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FI20075317A FI121114B (sv) 2007-05-04 2007-05-04 Förfarande för framställning av ditionit
CA2684688A CA2684688C (en) 2007-05-04 2008-04-25 Method for preparing dithionite
EP08761628A EP2150489B1 (en) 2007-05-04 2008-04-25 Method for preparing dithionite and use thereof
PCT/FI2008/050225 WO2008135631A1 (en) 2007-05-04 2008-04-25 Method for preparing dithionite
AT08761628T ATE521571T1 (de) 2007-05-04 2008-04-25 Verfahren zur herstellung von dithionit und seine verwendung
US12/598,457 US7993622B2 (en) 2007-05-04 2008-04-25 Method for preparing dithionite
CL2008001252A CL2008001252A1 (es) 2007-05-04 2008-04-30 Metodo para preparar una solucion de ditionita, donde bisulfito de sodio es reducido con una solucion de borohidruro de sodio, y se previene la elevacion del ph con dioxido de carbono.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20075317 2007-05-04
FI20075317A FI121114B (sv) 2007-05-04 2007-05-04 Förfarande för framställning av ditionit

Publications (3)

Publication Number Publication Date
FI20075317A0 FI20075317A0 (sv) 2007-05-04
FI20075317A true FI20075317A (sv) 2008-11-05
FI121114B FI121114B (sv) 2010-07-15

Family

ID=38069485

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20075317A FI121114B (sv) 2007-05-04 2007-05-04 Förfarande för framställning av ditionit

Country Status (7)

Country Link
US (1) US7993622B2 (sv)
EP (1) EP2150489B1 (sv)
AT (1) ATE521571T1 (sv)
CA (1) CA2684688C (sv)
CL (1) CL2008001252A1 (sv)
FI (1) FI121114B (sv)
WO (1) WO2008135631A1 (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121114B (sv) 2007-05-04 2010-07-15 Kemira Oyj Förfarande för framställning av ditionit
CN103485212B (zh) * 2013-09-04 2016-05-11 北京泛博化学股份有限公司 利用拔色剂拔色的方法
EP2924166A1 (de) * 2014-03-25 2015-09-30 Basf Se Verfahren zur Herstellung von gebleichtem Holzfaserstoff

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1472828A (en) * 1923-11-06 Apparatus fob making hydeosulphites
US791675A (en) * 1903-07-06 1905-06-06 Louis Descamps Process of making hydrosulfites.
EP0027369A1 (en) * 1979-10-12 1981-04-22 Thiokol Corporation Stable precursor solution for the generation of hydrosulfite and use thereof in bleaching wood pulp, brightening kaolin clay and reducing vat dyestuffs to their leuco form
US4788041A (en) 1986-12-22 1988-11-29 Morton Thiokol, Inc. Apparatus for the production of sodium hydrosulfite
SE457647B (sv) 1987-06-24 1989-01-16 Eka Nobel Ab Saett vid blekning av material med ditionitloesning
US5094833A (en) * 1989-01-05 1992-03-10 Morton International, Inc. High yield sodium hydrosulfite generation
US5098679A (en) 1990-12-21 1992-03-24 Olin Corporation Purification of alkali metal hydrosulfite solutions
SE468644B (sv) * 1991-05-24 1993-02-22 Sunds Defibrator Ind Ab Framstaellning av kemitermomekanisk massa samt impregneringsloesning innehaallande borhydrid och sulfit
GB9212926D0 (en) 1992-06-18 1992-07-29 Morton Int Inc Method of bleaching paper pulp
WO1997022749A1 (en) * 1995-12-19 1997-06-26 Kvaerner Hymac Inc. Process for treating refiner pulp
FI102911B (sv) * 1997-06-13 1999-03-15 Aga Ab Förfarande för stabilisering av pH i en massasuspension och för framst ällning av papper av den stabiliserade massan
CA2432459A1 (en) 2002-06-28 2003-12-28 Rohm And Haas Company Method for brightening pulp with hydrosulfite solutions
EP1418269B1 (en) * 2002-11-05 2009-02-11 Rohm And Haas Company Method for brightening virgin mechanical pulp
FI20030928A (sv) 2003-06-19 2004-12-20 Kvaerner Power Oy Förfarande för tillverkning av natriumditionit som används vid blekning av mekanisk massa
FI121114B (sv) 2007-05-04 2010-07-15 Kemira Oyj Förfarande för framställning av ditionit

Also Published As

Publication number Publication date
WO2008135631A1 (en) 2008-11-13
CL2008001252A1 (es) 2008-11-14
US7993622B2 (en) 2011-08-09
US20100181531A1 (en) 2010-07-22
ATE521571T1 (de) 2011-09-15
FI20075317A0 (sv) 2007-05-04
EP2150489B1 (en) 2011-08-24
CA2684688A1 (en) 2008-11-13
EP2150489A1 (en) 2010-02-10
FI121114B (sv) 2010-07-15
EP2150489A4 (en) 2010-06-30
CA2684688C (en) 2015-03-31

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