Perfluorobutane-1,4-disulfonic acid potassium salt → 1,4-Butanedisulfonic acid, 1,1,2,2,3,3,4,4-octafluoro-

HRID 1354795Notes

Reaction equation

HRID 1354795 reaction equation
[K+].[K+].[F:3][C:4]([F:22])([S:18]([O-:21])(=[O:20])=[O:19])[C:5]([F:17])([F:16])[C:6]([F:15])([F:14])[C:7]([F:13])([F:12])[S:8]([O-:11])(=[O:10])=[O:9]>O>[F:13][C:7]([F:12])([S:8]([OH:11])(=[O:10])=[O:9])[C:6]([F:15])([F:14])[C:5]([F:16])([F:17])[C:4]([F:3])([F:22])[S:18]([OH:21])(=[O:19])=[O:20]

Participants

3

Reactant 1

HCID 14384439Perfluorobutane-1,4-disulfonic acid potassium salt

Product 1

HCID 138480021,4-Butanedisulfonic acid, 1,1,2,2,3,3,4,4-octafluoro-

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

Perfluorobutane-1,4-bis-sulphonate dipotassium salt (15 g, 34.2 mmol) was dissolved in hot water (100 ml). It was added to an ion exchange column of Amberlyst 15 resin, (40×4 cm) which had been previously washed with excess 6N HCl and rinsed with distilled water. The column was then washed slowly with distilled water, and the first 300 ml of aqueous solution collected. The solution was concentrated in vacuum and the residue was dried under reduced pressure at 80° C. to afford perfluorobutane-1,4-bis-sulphonic acid. (11.0 g, 30 mmol, 88%)

Workup

  1. additionIt was added to an ion exchange column of Amberlyst 15 resin, (40×4 cm) which
  2. washhad been previously washed with excess 6N HCl
  3. washrinsed with distilled water
  4. washThe column was then washed slowly with distilled water
  5. customthe first 300 ml of aqueous solution collected
  6. concentrationThe solution was concentrated in vacuum
  7. customthe residue was dried under reduced pressure at 80° C.

Sources & evidence

ORD record
ord-59b86a227bde4309b21e636100f1c6eb
Source dataset
uspto-grants-2007_05
Patent number
US07223891B2

Reaction notes

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