Separation of potassium salts

Details Separation of potassium salts Separation of potassium salts

1990-02-09

1990-12-11

Russel, Jeffrey E.

Chemistry of inorganic compounds

Halogen or compound thereof

Binary fluorine containing compound

210915, 544242, 546304, 546345, C01D 302, C07D21172

Patent

active

049769464

ABSTRACT:
The potassium salts in aqueous mixtures of potassium fluoride and potassium salts of organic acids are separated and separately recovered by adding a dipolar, aprotic solvent until two liquid phases are present and then separating the phases. The aqueous phase contains the potassium fluoride and the solvent phase contains the potassium salt of an organic acid. Potassium fluoride and potassium 3,5-dichloro-6-fluoro-2-pyridinate, for example, are separately recovered from aqueous mixtures containing both by adding N-methyl-2-pyrrolidinone.

REFERENCES:
patent: 3761486 (1973-09-01), McGregor et al.
patent: 3923822 (1975-12-01), Domenico
patent: 4542221 (1985-09-01), Jones
patent: 4713231 (1987-12-01), Campbell et al.
patent: 4746744 (1988-05-01), Wilson et al.
patent: 4822887 (1989-04-01), Little et al.

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