Process and apparatus for purifying solid salt compositions

1. A method for purifying a solid salt composition, the method comprising:

separating the solid salt from an organic liquid containing epoxy resin and at least one of epihalohydrin and solvent to obtain a separated solid salt;

washing the separated solid salt with at least one solvent to reduce an amount of epoxy resin retained in the solid salt;

drying the washed salt at a temperature to reduce an amount of volatile components in the solid salt to obtain a solid salt having a reduced content of volatile components;

dissolving the solid salt having a reduced content of volatile components in water forming brine; and

removing insoluble material from the brine by filtration or dissolved air flotation and then removing soluble organic contaminants by carbon adsorption to form a purified brine wherein the insoluble material is a polymer byproduct or epoxy resin.

2. The method of claim 1 , wherein a filter aid is used to improve removal of insoluble material by filtration.

3. The method of claim 2 , wherein the filter aid is selected from diatomaceous earth, perlite and calcined rice hull.

4. The method of claim 1 , wherein the purified brine has a Total Organic Content of 10 ppm or less.

5. A method for purifying a solid salt composition comprising:

separating the solid salt from an organic liquid containing epoxy resin and at least one of epihalohydrin and solvent to obtain a separated solid salt;

washing the separated solid salt with at least one solvent to reduce an amount of epoxy resin retained in the solid salt;

dissolving the solid salt comprising reduced volatile components in water forming brine;

distilling the brine to remove the volatile organic components; and

removing at least one of insoluble material and then removing soluble organic contaminants from the brine to form a purified brine wherein the insoluble material is a polymer byproduct or epoxy resin.