Concurrent production of citric acid and alkali citrates.

摘要

The known liming sulfuric acid process for the recovery of crystalline citric acid from a fermentation broth is modified by subjecting the mother liquor from the crystallization to extraction with a water-immiscible organic extraction that contains an amine. The resulting extract is neutralized with a recycled brine with alkali citrate and alkali citrate is crystallized from the concentrated brine obtained this way. <IMAGE>