Abstract: Carbonization method was adopted for purification of industrial lithium carbonate.The key influencing factors，such as carbonization temperature，carbonization time，and carbonization pressure，were experimentally studied and analyzed. The optimum reaction conditions were confirmed as follows：carbonization pressure was 6×105～6.5×105 Pa，carbonization time was 2～3 h，carbonization temperature was 30～40 ℃，brand of resin was D110，flow rate of mother liquor was 120～140 g/h，and mixing speed was over 30 r/s.Under such conditions the purity of prepared lithium carbonate could reach 99.991%.

Key words: carbonization method, high purity, lithium carbonate