Method to produce sodium citrate using electrodialysis

Details Method to produce sodium citrate using electrodialysis Method to produce sodium citrate using electrodialysis

1990-12-21

1993-03-16

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041825, 204301, B01D 6144, B01D 6300

Patent

active

051941309

ABSTRACT:
The present invention relates to a method and an apparatus of electodialytically treating an acid such as citric acid to produce a desired salt of the anion of the acid, such as sodium citrate. A cation can be introduced into a solution via a cheap donor salt solution such as NaCl or KCl, without significantly altering or degrading the purity of the final product. The apparatus comprises a three-compartment cell, which comprises at least two adjacent anion selective membranes to accomplish a cation substitution reaction exploiting the differential selectivities of the adjacent anion membranes employed.

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