Process for making high purity salts

A process for making a high purity salt, the process comprising the steps of:

• (a) providing an organic compound selected from the group consisting of cis-cyclohexane-1,2-dicarboxylic acid anhydride, cis-cyclohexane-1,2-dicarboxylic acid, and mixtures thereof;
• (b) providing a metal salt selected from the group consisting of metal hydroxides and metal carbonates, the metal salt comprising a metal selected from the group consisting of alkali metals and alkaline earth metals;
• (c) adding the metal salt and the organic compound to an aqueous medium to produce a reaction mixture;
• (d) heating the reaction mixture to a temperature of about 65° C. to about 80° C. to react the organic compound and the metal salt and form an organic salt;
• (e) collecting the organic salt from the aqueous medium;
• (f) exposing the collected organic salt to microwave radiation having a frequency of about 900 MHz to about 2,500 MHz to reduce the moisture content of the organic salt to about 20% or less;
• and
• (g) exposing the organic salt from step (f) to infrared radiation having a frequency of about 9.9×104 GHz to about 3×105 GHz to reduce the moisture content of the organic salt to about 7% or less.