Treatment process for preparing simple substance arsenic through arsenic trioxide wet reduction

• Main Authors: PENG GUOMIN, GUO YINGANG, LIAO ZHONGYI, WANG BOYI, PANG JIAGANG, XU MINGXIANG, XIONG LINGLING, TIAN JING, CUI YUTAO, GAO QIANGWEN
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a treatment process for preparing elemental arsenic by wet reduction of arsenic trioxide, and belongs to the technical field of nonferrous metallurgy and environmental governance, and the specific process is as follows: adding arsenic trioxide into a dissolving agent solution for dissolving; adding a pre-reducing agent into the dissolved feed liquid for pre-reduction, filtering after the pre-reduction reaction is finished, and finely filtering the obtained filtrate to obtain finely filtered liquid; transferring the obtained finely filtered liquid into a high-pressure reaction kettle, introducing protective gas under stirring to replace gas in the reaction kettle, introducing hydrogen, controlling the reaction temperature to be 180-260 DEG C, controlling the reaction pressure to be 2.0-4.5 MPa, continuously supplementing hydrogen in the reaction process, keeping the temperature constant, carrying out reduction reaction, judging the reaction endpoint according to the change condition of