Anti-caking composition for salt

Abstract

Aqueous anticaking agent solutions are prepared by mixing a ferrous source, a citrate source, a hydroxide source and water together. The ferrous source and the citrate source are present in a Fe to citrate molar ratio of from 0.5 to 1.5 and the hydroxide source is present in an amount to give a total hydroxide to citrate molar ratio of from (0.1+x) to (1.0+x), where x=the number of ionizable protons associated with the carboxylate sites on the citrate source. Alternatively, the hydroxide source is present in an amount such that the intermediate aqueous mixture has a pH at the time of mixing of at least 5. Salt is treated by applying the described aqueous anticaking agent solution in an amount effective to reduce caking of the salt.

Dependencies are inferred from the claim text.