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Chemical and Process Engineering Resources

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Category: Reactions and Processes
Question: How is citric acid produced on an industrial scale?
Keywords: v1i15,citric,acid,production,uses
Answer: It's not uncommon for people to immediately think that citric acid is produced as a byproduct from the many processes used to manufacture citric juices. In reality, only a very small percentage of citric acid comes from such processes.Rather, citric acid is typically manufactured by the aerobic fermentation of crude sugar or corn sugar by special strain of Aspergillus niger:C12H22O11 (sucrose) + H2O + 3O2 --> 2C6H8O7 (citric acid)+ 4H2O2C6H12O6 (detrose) + 3O2 --> C6H8O7 (citric acid) + 4H2OUses for citric acid include: acidulant in carbonated beverages, jams, and jelliesmedicinal citrates and effervescent saltsmanufacture of acetyl tributyl citrate (plasticizer for vinyl resins)
Links: More on Citric Acid Production





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