Abstract: Anion exchange resins having improved anion capacity are prepared using an improved process whereby the reaction medium can be re-employed. The process comprises contacting a haloalkylated copolymer particle with a compound capable of displacing the halogen of the haloalkyl functionality (e.g., dimethylamine) in a reaction medium (e.g., water). Optionally, an ionizable electrolyte is incorporated into the reaction medium. After preparation of anion exchange resins, the reaction medium containing ionizable electrolyte is re-employed in preparing anion exchange resins.