citric acid extraction

[dragonstar57]

how would one go about extracting citric acid from lemon juice, would distillation or Electrolysis work?

[UC]

Best bet would be to precipitate it as the calcium salt, isolate and wash, treat with aqueous sulfuric acid and filter the crude citric acid solution away from the solid calcium sulfate. Careful crystallization should then yield relatively pure citric acid.

[The Foot Tapper]

Yes you just react with calcium hydroxide and make up with a strong acid.

 

Reference:

http://gomestic.com/...-citrus-fruits/