Method of separating multivalent ions and lactate ions from...

Details Method of separating multivalent ions and lactate ions from... Method of separating multivalent ions and lactate ions from...

2007-05-15

2007-05-15

Phasge, Arun S. (Department: 1753)

Chemistry: electrical and wave energy

Processes and products

Electrophoresis or electro-osmosis processes and electrolyte...

C204S539000, C204S540000, C204S541000, C204S543000, C204S544000

Reexamination Certificate

active

10693922

ABSTRACT:
The invention pertains to a method of separating multivalent ions and lactate ions from a fermentation broth comprising a multivalent ion lactate salt by using an electrodialysis or electrolysis apparatus, comprising the steps of introducing the broth wherein the multivalent ion concentration is at least 0.1 mole/l, the lactate ion concentration is less than 300 g/l, and less than 10 mole % of the lactate ion are other negatively charged ions, into a first compartment of the electrodialysis or electrolysis apparatus, which compartment is limited by an anion-selective or non-selective membrane and a cathode, and wherein the multivalent ion is converted to obtain a residual stream comprising the hydroxide of the multivalent ion, and the lactate ion is transported through the anion-selective or non-selective membrane into a second compartment limited by the anion-selective or non-selective membrane and an anode, after which the lactate ion is neutralized to lactic acid.

REFERENCES:
patent: 5681728 (1997-10-01), Miao
patent: 5746920 (1998-05-01), Krischke et al.
patent: 6221225 (2001-04-01), Mani
patent: 6331236 (2001-12-01), Mani
patent: 6495013 (2002-12-01), Mazur et al.
patent: 2002/0005356 (2002-01-01), Mazur et al.

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