种pH可控循环双浊点萃取镉的方法

• Format: Patent
• Language: Chinese
• Published: 11.01.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

本发明种pH可控循环双浊点萃取镉的方法，属于分析化学中痕量金属元素的分离富集和分析测定技术领域。该方法采用温敏性嵌段共聚物L31形成的胶团溶液进行浊点萃取，调节pH至碱性，加热到浊点温度后分成水相和胶团相两相，镉离子以氢氧化镉的形式富集于胶团相；然后用水作为溶液，调节胶团相的pH至酸性，再次浊点反萃，氢氧化镉解离，最后得到富集镉离子的水相溶液，并用火焰原子吸收法测定镉离子的含量。分离富集后的胶团相可以进行循环利用。本发明操作简单，萃取过程绿色环保，萃取效率高，为其他金属离子的分离富集提供了有效参考。