Recovery of aprotic polar solvents from their saline aqueous sol

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

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2041825, B01D 6144, B01D 6154

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active

054587514

ABSTRACT:
The invention relates to recovery of an aprotic polar solvent from a saline aqueous solution of this solvent, by a process which consists in desalting the said solution by electrodialysis then in distilling the desalted solution.
To avoid precipitation of metal hydroxides during the electrodialysis, the brine is kept at an acidic pH.

REFERENCES:
patent: 4802965 (1989-02-01), Puetter et al.
patent: 5089102 (1992-02-01), Voss
patent: 5145569 (1992-09-01), Schneider et al.
Chemical Abstracts, vol. 88, 1978, p. 554, No. 88:152028v.

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