Process for making high purity salts
AssigneeMilliken & Company
InventorDarin L. Dotson
Life of this patent
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Abstract
A process for making a high purity salt comprises the steps of providing an organic compound, providing a metal salt, adding the metal salt and organic compound to an aqueous medium, heating the reaction mixture to react the organic compound and the metal salt to form an organic salt, collecting the organic salt, and directly contacting the collected organic salt with a heated gas stream while agitating the collected organic salt to reduce the moisture content of the dried organic salt to about 7% or less.
Claims23
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, metal carbonates, metal nitrates, metal chlorides, metal carboxylates, 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) directly contacting the collected organic salt with a heated gas stream while agitating the collected organic salt to reduce the moisture content of the dried organic salt to about 7% or less.
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 calcium salt;
- (c) adding the calcium 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) directly contacting the collected organic salt with a heated gas stream while agitating the collected organic salt to reduce the moisture content of the dried organic salt to about 7% or less.
Dependencies are inferred from the claim text.