本发明提供一种双极膜电渗析法制备氢溴酸的方法。所述双极膜电渗析装置的膜堆由双极膜、阳离子交换膜和阴离子交换膜交错组合而成，在膜堆两侧通直流电以后，H₂O在双极膜的中间层中被电解为H⁺和OH^‑，并且H⁺通过阳离子交换膜向阴极迁移，进入酸室，盐室中的Br^‑通过阴离子交换膜也进入酸室，由此在酸室中生成了HBr；OH^‑通过阴离子交换膜向阳极迁移，进入碱室，盐室中的Na⁺通过阳离子交换膜也进入碱室，由此在碱室中生成了NaOH。利用双极膜电渗析技术可以实现含溴卤水短流程制备附加值较高的氢溴酸以及氢氧化钠。

The invention provides a method for preparing hydrobromic acid by a bipolar membrane electrodialysis method. The membrane stack of the bipolar membrane electrodialysis device is composed of bipolar membranes, cation exchange membranes, and anion exchange membranes. After direct current is applied to both sides of the membrane stack, H₂O is electrolyzed into H⁺ in the middle layer of the bipolar membrane. And OH^-, and H⁺ migrates to the cathode through the cation exchange membrane and enters the acid chamber. Br- in the salt chamber also enters the acid chamber through the anion exchange membrane, thereby generating HBr in the acid chamber; OH^- passes through the anion exchange membrane to the acid chamber. The anode migrates and enters the alkali compartment, and the Na⁺ in the salt compartment also enters the alkali compartment through the cation exchange membrane, thereby generating NaOH in the alkali compartment. The use of bipolar membrane electrodialysis technology can realize the preparation of high value-added hydrobromic acid and sodium hydroxide from bromine-containing brine in a short process.