Method for preparing gallium oxide by treating gallium nitride waste through acid process

• Main Authors: ZHANG KAI, XIONG YANHANG, ZHAO ZHUO, XU LIANG, HE JINDONG, XU MENGMENG, TIAN YONGPAN, ZHANG FUYUAN
• Format: Patent
• Language: Chinese; English
• Published: 19.11.2021
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; INORGANIC CHEMISTRY; METALLURGY

The invention discloses a method for preparing gallium oxide by treating gallium nitride waste through an acid process, and belongs to the technical field of non-ferrous metallurgy. Under the normal pressure condition, an oxidizing agent and a chlorine-containing salt are added into an acid system to conduct oxidizing leaching on the gallium nitride waste firstly, gallium is dissolved and enters a leaching solution, nitrogen is oxidized into environment-friendly N2 and enters a gas phase, and effective separation of the two elements of gallium and nitrogen is achieved; and then the gallium-containing leachate is neutralized to precipitate out gallium in the form of Ga(OH)3, and further calcining is performed to obtain the gallium oxide (beta-Ga2O3) product. According to the technical scheme, the stable gallium nitride waste can be effectively treated, the gallium oxide (beta-Ga2O3) product is finally obtained, high-temperature and high-pressure treatment is not involved in the whole process, the process is sh