Purification method of chloride

• Main Authors: FU JIE, GE MIN, LI QINGNUAN, SHEN MIAO, WANG JIANQIANG, DOU QIANG, TANG RUI, LIU YANG, QIAN YUAN, ZHAO SUFANG
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2021
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY

The invention discloses a purification method of chloride. The method comprises the following steps: enabling a mixture of inert carrier gas and chloride gas to pass through chlorine-containing moltensalt, enabling gas escaping from the surface of the chlorine-containing molten salt to pass through a tower plate of a rectifying tower, and collecting purified chloride from the top of the rectifying tower, wherein the chloride is any one of AlCl3, ZrCl4, BeCl2, BiCl3 and ZnCl2, the chlorine-containing molten salt is molten salt containing one or more of NaCl, LiCl, KCl, CaCl2, CsCl, RbCl and MgCl2, the content of oxygen in the chlorine-containing molten salt is 400 ppm or below, and the temperature of the chlorine-containing molten salt is 290-800 DEG C and is higher than the melting pointof the chlorine-containing molten salt. The content of oxygen in the purified chloride can be controlled to be 96 ppm or below, the lowest content can be controlled to be 1 ppm or below, and the method can be used for preparin