Method for extracting bromine from chlorine-free brine

The invention discloses a method for extracting bromine from chlorine-free brine, and belongs to the technical field of bromine extraction, the method comprises the following steps: electrooxidation and gaseous membrane separation; according to the method disclosed by the invention, chlorine-free oxidation is realized in a mode of combining an electrooxidation method and a gaseous membrane separation method, relatively high extraction efficiency is still realized for low-grade bromine resources, an anode material used in electrooxidation is not easy to corrode, relatively high oxidation efficiency can still be realized under low electrode potential, and the method is suitable for industrial production. The gaseous membrane used in gaseous membrane separation is small in surface tension, good in wettability and good in durability, particularly good in acid and alkali resistance, and does not have the problem of surface material falling in use. 本发明公开了一种无氯卤水提溴的方法，属于提取溴素技术领域，所述方法由以下步骤组成：电氧化，气态膜分离；本发明通过电氧化法与气态膜分离法