2results about "Hydrogen bromide" patented technology

The application discloses a high-purity electronic-grade hydrogen bromide metal ion impurity control device and a control method. The device comprises an adsorption column, a bag-type dust collector and a rectifying tower. First impurity removal mechanisms are arranged at the upper end of the adsorption column and the top of the rectifying tower to remove gas-phase metal impurities. Second impurity removal mechanisms are arranged at the tower kettle of the rectifying tower to remove liquid-phase metal impurities. The bag-type dust collector comprises a flow channel, a keel frame and dust removal bags. Third impurity removal mechanisms are arranged on the flow channel. The dust collector device of metal ions is added to the existing process system, and the structure is designed to realize solid-liquid separation of liquid to intercept metal particles. The structures of the adsorption equipment and the rectifying equipment are designed to remove gas-phase metal impurities and liquid-phase metal impurities, thereby increasing the removal efficiency and effect of metal particles.

A process of hydrogen production comprising the following steps: i) providing an electrolysis unit (51) comprising one or more electrolytic cells (53) each comprising an anode (59), a cathode (55), and an ion-exchange membrane (57); ii) providing an anolyte (43) comprising hydrogen bromide at a concentration ranging from 0.5 to 12.5 M; and a catholyte (61); the catholyte comprising an aqueous solution of one or more strong acids selected from hydrochloric acid, nitric acid, sulfuric acid, perchloric acid, hydroiodic acid or any mixtures thereof, at a pH of at most 1.0; iii) performing an electrolysis to convert at least a part of the hydrogen bromide of the hydrogen bromide aqueous solution into bromine by operating the one or more electrolytic cells (53); and iv) recovering a liquid effluent (49) comprising bromine from the anode side and a gaseous effluent (47) comprising hydrogen at the cathode side.