Novel extraction method for preparing high-purity aluminum chloride

• Main Authors: SHANG JIGUANG, HAN JIXUN, SUN GUOXIN
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention discloses a novel extraction method for preparing high-purity aluminum chloride. According to the novel extraction method disclosed by the invention, iron impurities in an aluminum chloride solution are extracted by utilizing an extracting agent N,N,N',N'-tetraoctyl-3-oxa-pentanediamide, and the extraction effect is good; the novel extraction method can be used for extracting high-content iron and trace iron impurities in the aluminum chloride solution, and the extraction is approximately complete; the extraction efficiency on Ca<2+> and Zn<2+> in the aluminum chloride solution is good; reverse extraction and recycling are carried out on organic phase after extraction, and reutilization of the extracting agent can be realized. 本发明公开了种制备高纯氯化铝的萃取新方法。该方法为利用萃取剂N,N,N'N'-四辛基-3-氧戊二酰胺萃取氯化铝溶液中的铁杂质，萃取效果良好。可以用于萃取氯化铝溶液中的高含量的铁和痕量铁杂质，接近萃取完全。并且对氯化铝溶液中的Ca、Zn萃取效果良好。对萃取后的有机相进行反萃回收利用，可实现萃取剂的重复利用。