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一个可持续的水力金策略,有效地回收白金从废弃的石油催化剂改造

S Maryam Sadeghi¹, Helena M V M Soares²

¹LAQV/REQUIMTE, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade Do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.

Environmental science and pollution research international

|August 31, 2023

概括

这项研究提出了一种高效的水力金方法,可以从耗尽的催化剂中回收金. 该工艺使用微波辅助出和离子交换,以可持续的方式实现高纯度回收.

科学领域:

金工程金工程金工程
环境科学环境科学
可持续化学可持续化学

背景情况:

(Pt) 是一种重要的贵金属,广泛用于工业催化应用.
从使用过的催化剂中有效地回收对于资源保护和经济可行性至关重要.
现有的回收方法可能是复杂的,昂贵的,或环境负担.

研究的目的:

开发一种简化,经济和环境可持续的水力金战略,用于从废弃的石化催化剂中回收金.
为了优化一个两步过程,包括微波辅助浸出和离子交换净化.
用拟议的方法评估回收的的效率和纯度.

主要方法:

开发了一种两步的水电金工艺:微波辅助出,然后进行离子交换净化.
在优化条件下,使用盐酸 (HCl) 和过氧化 (H2O2) 混合物进行了浸出.
净化利用强的离子交换树脂 (PurogoldTM A194) 来选择性地将白金从其他金属如 (Al) 和铁 (Fe) 中分离出来.

主要成果:

完全溶解金,和铁的方法是使用微波辅助浸出25%的HCl和2%的H2O2在2个60秒的周期内完成.
离子交换树脂有效地分离了白金,产生了纯度为98.1%的化物.
在精炼中,以99.8%的纯度回收,这表明选择性分离成功.

结论:

拟议的简化水电金工艺有效地从已耗尽的石化催化剂中回收高质量的.
该方法具有经济性和环境可持续性,最大限度地降低了试剂消耗,水时间和能源使用.
这种方法有助于循环经济,使的再利用和副产品的回收成为可能.

关键词:

酸性氧化洗是一种酸性氧化洗.离子交换过程中的离子交换过程.微波辅助的洗过程中使用微波.金的回收是为了金的回收.

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