Citric acid

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Offline Futhark

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Citric acid
« on: 26/04/2006 19:17:32 »

I would very much like to know how citric acid is produced by the industry. I know that sugar and some kind of bacteria is involved, but I need much more information for my chemistry rapport. [:)]

Hope you can help.




Offline Hadrian

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Re: Citric acid
« Reply #1 on: 30/04/2006 18:36:19 »

In this production technique, which is still the major industrial route to citric acid used today, cultures of Aspergillus niger are fed on sucrose to produce citric acid. After the mold is filtered out of the resulting solution, citric acid is isolated by precipitating it with lime (calcium hydroxide) to yield calcium citrate salt, from which citric acid is regenerated by treatment with sulfuric acid.

Alternatively, citric acid is sometimes isolated from the fermentation broth by extraction with a hydrocarbon solution of the organic base trilaurylamine, followed by re-extraction from the organic solution by water


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