WO2006048293A3 - Verfahren zur herstellung von natriumdithionit - Google Patents

Verfahren zur herstellung von natriumdithionit Download PDF

Info

Publication number
WO2006048293A3
WO2006048293A3 PCT/EP2005/011786 EP2005011786W WO2006048293A3 WO 2006048293 A3 WO2006048293 A3 WO 2006048293A3 EP 2005011786 W EP2005011786 W EP 2005011786W WO 2006048293 A3 WO2006048293 A3 WO 2006048293A3
Authority
WO
WIPO (PCT)
Prior art keywords
mother liquor
sodium dithionite
stream
sub
sodium
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.)
Ceased
Application number
PCT/EP2005/011786
Other languages
English (en)
French (fr)
Other versions
WO2006048293A2 (de
Inventor
Armin Diefenbacher
Hartwig Voss
Reinhard Schneider
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to US11/666,973 priority Critical patent/US7968076B2/en
Priority to EP05805323A priority patent/EP1809574A2/de
Publication of WO2006048293A2 publication Critical patent/WO2006048293A2/de
Publication of WO2006048293A3 publication Critical patent/WO2006048293A3/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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-)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Natriumdithionit mit den Schritten (a) Erstellen eines Syntheseansatzes aus Natriumformiat, Schwefeldioxid und einer alkalischen Natriumverbindung in wässrig-methanolischer Lösung unter Entstehen einer Natriumdithionit-Mutterlauge, (b) Abtrennen von Natriumdithionit aus der Natriumdithionit-Mutterlauge, wobei eine Rest-Mutterlauge anfällt, (c) Abtrennen von Methanol aus der Rest-Mutterlauge, (d) Trennen der Rest-Mutterlauge in einen thiosulfatreichen ersten Teilstrom und einen thiosulfatarmen, formiathaltigen zweiten Teilstrom mittels einer Nanofiltration, (e) Aufkonzentrieren von Natriumformiat in dem zweiten Teilstrom und (f) Rückführen des aufkonzentrierten zweiten Teilstromes in den Verfahrensschritt (a).
PCT/EP2005/011786 2004-11-03 2005-11-03 Verfahren zur herstellung von natriumdithionit Ceased WO2006048293A2 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/666,973 US7968076B2 (en) 2004-11-03 2005-11-03 Method for producing sodium dithionite
EP05805323A EP1809574A2 (de) 2004-11-03 2005-11-03 Verfahren zur herstellung von natriumdithionit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004053090A DE102004053090A1 (de) 2004-11-03 2004-11-03 Verfahren zur Herstellung von Natriumdithionit
DE102004053090.4 2004-11-03

Publications (2)

Publication Number Publication Date
WO2006048293A2 WO2006048293A2 (de) 2006-05-11
WO2006048293A3 true WO2006048293A3 (de) 2007-02-15

Family

ID=36143400

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/011786 Ceased WO2006048293A2 (de) 2004-11-03 2005-11-03 Verfahren zur herstellung von natriumdithionit

Country Status (5)

Country Link
US (1) US7968076B2 (de)
EP (1) EP1809574A2 (de)
CN (1) CN101056820A (de)
DE (1) DE102004053090A1 (de)
WO (1) WO2006048293A2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049568A1 (de) 2005-10-17 2007-04-19 Basf Ag Verfahren zur kontinuierlichen Hydrierung oder hydrierenden Aminierung
US8027479B2 (en) 2006-06-02 2011-09-27 Coding Technologies Ab Binaural multi-channel decoder in the context of non-energy conserving upmix rules
CN102050471B (zh) * 2010-11-05 2012-05-23 烟台大学 甲酸钠法保险粉废液中甲酸钠和亚硫酸钠的回收方法
JP7372130B2 (ja) * 2019-12-09 2023-10-31 日東電工株式会社 水素貯蔵方法、水素ガスの製造方法及び水素ガス製造システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2622952A1 (de) * 1975-05-21 1976-11-25 Mitsui Toatsu Chemicals Verfahren zur herstellung von wasserfreiem natriumdithionit
JPS52138090A (en) * 1976-04-26 1977-11-17 Mitsui Toatsu Chem Inc Treatment of mother liquor from production of anhydrous sodium dithionite
DE4437253A1 (de) * 1993-10-28 1995-05-04 Basf Ag Verfahren zur Herstellung von wasserfreiem Natriumdithionit
EP0930535A1 (de) * 1998-01-21 1999-07-21 Eastman Kodak Company Behandlungsverfahren für verbrauchte Stabilisierungsbäder,die in photographischen Verarbeitung verwendet werden
US6117315A (en) * 1998-01-22 2000-09-12 Eastman Kodak Company Process and device for recycling washing water in photographic processing

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2442418B2 (de) * 1974-09-05 1980-04-17 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von Natriumdithionit
JPS51136596A (en) * 1975-05-21 1976-11-26 Mitsui Toatsu Chem Inc Method for processing mot her liquid in the production of sodium dithionite
JPS51136597A (en) * 1975-05-21 1976-11-26 Mitsui Toatsu Chem Inc Method for processing mother solution of sodium dithionite anhydride production
DE2646825A1 (de) * 1976-10-16 1978-04-20 Basf Ag Verfahren zur kontinuierlichen herstellung von natriumdithionitloesungen durch kathodische reduktion
JPS5350090A (en) * 1976-10-20 1978-05-08 Mitsui Toatsu Chem Inc Production of anhydrous sodium dithionite
DE2651418C2 (de) 1976-11-11 1986-01-09 Basf Ag, 6700 Ludwigshafen Verfahren zur Aufarbeitung der bei der Herstellung von Natriumdithionit nach dem Natriumformiatverfahren anfallenden Mutterlaugen
DE2716032C2 (de) 1977-04-09 1985-11-14 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von Natriumdithionit
CA2016353A1 (en) * 1989-05-23 1990-11-23 Charles E. Winslow, Jr. Method for re-use of aqueous co-product from manufacture of sodium dithionite
US5792441A (en) * 1996-10-11 1998-08-11 Pulp And Paper Research Institute Of Canada Fixed-resin bed technologies for the treatment of the chlorine dioxide generator effluent and feeds stream
DE19954299A1 (de) * 1999-11-11 2001-05-17 Eilenburger Elektrolyse & Umwelttechnik Gmbh Verfahren zur gleichzeitigen elektrochemischen Herstellung von Natriumdithionit und Natriumperoxodisulfat
JP2001270844A (ja) 2000-03-23 2001-10-02 Mitsubishi Gas Chem Co Inc ハイドロサルファイト製造廃液からのギ酸ナトリウムの回収方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2622952A1 (de) * 1975-05-21 1976-11-25 Mitsui Toatsu Chemicals Verfahren zur herstellung von wasserfreiem natriumdithionit
JPS52138090A (en) * 1976-04-26 1977-11-17 Mitsui Toatsu Chem Inc Treatment of mother liquor from production of anhydrous sodium dithionite
DE4437253A1 (de) * 1993-10-28 1995-05-04 Basf Ag Verfahren zur Herstellung von wasserfreiem Natriumdithionit
EP0930535A1 (de) * 1998-01-21 1999-07-21 Eastman Kodak Company Behandlungsverfahren für verbrauchte Stabilisierungsbäder,die in photographischen Verarbeitung verwendet werden
US6117315A (en) * 1998-01-22 2000-09-12 Eastman Kodak Company Process and device for recycling washing water in photographic processing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197801, Derwent World Patents Index; AN 1978-01138A, XP002406002 *

Also Published As

Publication number Publication date
WO2006048293A2 (de) 2006-05-11
DE102004053090A1 (de) 2006-05-04
US7968076B2 (en) 2011-06-28
CN101056820A (zh) 2007-10-17
US20080187484A1 (en) 2008-08-07
EP1809574A2 (de) 2007-07-25

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