Title:
METHOD FOR CLEANING AQUEOUS GLYOXAL SOLUTIONS
Document Type and Number:
WIPO Patent Application WO/2010/076252
Kind Code:
A3
Abstract:
The invention relates to a method for cleaning an aqueous glyoxal solution comprising at least one acid by extractive acid separation, comprising the steps of: I) mixing an aqueous glyoxal solution with an ion exchanger solution, comprising 20 to 60 wt % of a tertiary amine and 80 to 40 wt % of an organic solvent immiscible with water at a dwell time of < 5 minutes and a temperature of 30 to 100°C, for producing a mixture, II) separating said mixture from step I) into an extracted, aqueous glyoxal solution and a charged ion exchanger solution and separating of the charged ion exchanger solution at temperatures from 30 to 100°C and III) separating the extracted, aqueous glyoxal solution into teriary amine and purified aqueous glyoxal solution and separation of the tertiary amine at temperatures < 30°C.
Inventors:
DECKERT PETRA (DE)
GROLL PETER (DE)
RUMPF BERND (DE)
HORN CHRISTIAN (DE)
GROLL PETER (DE)
RUMPF BERND (DE)
HORN CHRISTIAN (DE)
Application Number:
PCT/EP2009/067611
Publication Date:
September 16, 2010
Filing Date:
December 21, 2009
Export Citation:
Assignee:
BASF SE (DE)
DECKERT PETRA (DE)
GROLL PETER (DE)
RUMPF BERND (DE)
HORN CHRISTIAN (DE)
DECKERT PETRA (DE)
GROLL PETER (DE)
RUMPF BERND (DE)
HORN CHRISTIAN (DE)
International Classes:
C07C45/80; C07C47/127
Foreign References:
| DE3402733A1 | 1984-08-02 | |||
| EP0219045A2 | 1987-04-22 | |||
| US3860656A | 1975-01-14 |
Other References:
J. H. MCCAIN: "Deacidification of glyoxal by liquid ion exchange", IND. ENG. CHEM. PROCESS DES. DEV., vol. 19, 1980, pages 494 - 497, XP002588023
Attorney, Agent or Firm:
ISENBRUCK, Günter (Eastsite OneSeckenheimer Landstr. 4, Mannheim, DE)
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