Back extraction method for molybdenum-containing organic phase

• Main Authors: ZHOU ZHIQUAN, ZHI MEIFENG, ZHAO FENGQI, SHU ZUJUN, ZHANG YONGMING
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2017
• 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 provides a back extraction method for a molybdenum-containing organic phase. The method employs a multi-stage mixing and clarification tank for counter-current back extraction, and the multi-stage mixing and clarification tank comprises a back extraction section and multiple washing sections; the molybdenum-containing organic phase and a back extraction agent are added in the primary-stage back extraction section, a washing agent is added in the final-stage terminal washing section, and a flow ratio of the primary-stage molybdenum-containing organic phase to the final-stage washing agent is 1 to 100; the addition amount of the back extraction agent allows the pH value of back extraction liquid flowing out from the back extraction section to be in a range of 8 to 11; the back extraction agent is liquefied ammonia or ammonia gas; and the washing agent is pure water. The method improves phase-splitting effect and mutual entrainment of two phases by increasing the difference between densities of two