Patent ID: 7981388

Claim:
A method for treating lithium salt wherein the lithium salt comprises Li 2 B 12 F x H 12-x-y Z y where x+y is from 3 to 12, and x and y are independently from 0 to 12, and Z comprises at least one of Cl and Br; the method comprising at least one step selected from the group consisting of: step a) dissolving the lithium salt in an aprotic organic solvent to form a solution and passing said solution through an adsorbent column, step b) dissolving the lithium salt in a solvent to form a solution, and passing said solution through a cation exchange column in Li + form, step c) drying the lithium salt at greater than about 180° C. under vacuum or nitrogen purge, and step d) dissolving the lithium salt in an aprotic organic solvent to form a solution and passing said solution through a Li-substituted molecular sieve, then; recovering treated lithium salts.