DK67394A - Process for the recovery of strong acids from aqueous solutions - Google Patents

Process for the recovery of strong acids from aqueous solutions

Info

Publication number
DK67394A
DK67394A DK067394A DK67394A DK67394A DK 67394 A DK67394 A DK 67394A DK 067394 A DK067394 A DK 067394A DK 67394 A DK67394 A DK 67394A DK 67394 A DK67394 A DK 67394A
Authority
DK
Denmark
Prior art keywords
acid
salt
hydrate
recovery
aqueous solutions
Prior art date
Application number
DK067394A
Other languages
Danish (da)
Other versions
DK173113B1 (en
Inventor
Sven Ivar Hommeltoft
Original Assignee
Haldor Topsoe As
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 Haldor Topsoe As filed Critical Haldor Topsoe As
Priority to DK199400673A priority Critical patent/DK173113B1/en
Priority to EP95108171A priority patent/EP0687658B1/en
Priority to DE69501483T priority patent/DE69501483T2/en
Priority to RU95109864A priority patent/RU2147575C1/en
Priority to JP14491095A priority patent/JP3698459B2/en
Priority to CN95106560A priority patent/CN1065226C/en
Publication of DK67394A publication Critical patent/DK67394A/en
Application granted granted Critical
Publication of DK173113B1 publication Critical patent/DK173113B1/en

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

Method for recovery of a perfluorated sulphonic acid in anhydrous form from an aqueous solution containing the acid in hydrate-form, the method being characterized in that a weak base in the form of a soluble salt of the acid is added to the acidic solution; the solution containing acid hydrate and salt of the acid is concentrated into a substantially anhydrous acid hydrate salt mixture; and finally the acid is recovered in anhydrous form by distilling from the mixture as well as possibly recirculating remaining amounts of the acid-hydrate-salt mixture from the distillation step to the salt addition step.
DK199400673A 1994-06-13 1994-06-13 Method for recovery of a perfluorated sulphonic acid in anhydrous form from an aqueous solution as well of use of the method DK173113B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK199400673A DK173113B1 (en) 1994-06-13 1994-06-13 Method for recovery of a perfluorated sulphonic acid in anhydrous form from an aqueous solution as well of use of the method
EP95108171A EP0687658B1 (en) 1994-06-13 1995-05-29 Process for the recovery of a strong acid from an aqueous solution
DE69501483T DE69501483T2 (en) 1994-06-13 1995-05-29 Process for the recovery of a strong acid from an aqueous solution
RU95109864A RU2147575C1 (en) 1994-06-13 1995-06-09 Method of regeneration of perfluorinated sulfoacid as anhydrous form from aqueous solution
JP14491095A JP3698459B2 (en) 1994-06-13 1995-06-12 Method for recovering strong acid from aqueous solution
CN95106560A CN1065226C (en) 1994-06-13 1995-06-13 Process for the recovery of a strong acid from an aqueous solution

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK67394 1994-06-13
DK199400673A DK173113B1 (en) 1994-06-13 1994-06-13 Method for recovery of a perfluorated sulphonic acid in anhydrous form from an aqueous solution as well of use of the method

Publications (2)

Publication Number Publication Date
DK67394A true DK67394A (en) 1995-12-14
DK173113B1 DK173113B1 (en) 2000-01-31

Family

ID=8096232

Family Applications (1)

Application Number Title Priority Date Filing Date
DK199400673A DK173113B1 (en) 1994-06-13 1994-06-13 Method for recovery of a perfluorated sulphonic acid in anhydrous form from an aqueous solution as well of use of the method

Country Status (2)

Country Link
DK (1) DK173113B1 (en)
RU (1) RU2147575C1 (en)

Also Published As

Publication number Publication date
RU2147575C1 (en) 2000-04-20
DK173113B1 (en) 2000-01-31
RU95109864A (en) 1997-05-10

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PBP Patent lapsed

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