ICGM, Univ Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
Heraeus Deutschland GmbH & Co. KG, Heraeusstr. 12-14, 63450 Hanau, Germany.
Molecules. 2021 Jan 28;26(3):684. doi: 10.3390/molecules26030684.
Precious metals, in particular Pd, have a wide range of applications in industry. Due to their scarcity, precious metals have to be recycled, preferably with green and energy-saving recycling processes. In this article, palladium extraction from an aluminosilicate-supported catalyst, containing about 2 wt% (weight%) of Pd (100% PdO), with supercritical CO (scCO) assisted by complexing polymers is described. Two polymers, p(FDA)SH homopolymer and p(FDA--DPPS) copolymer (FDA: 1,1,2,2-tetrahydroperfluorodecyl acrylate; DPPS: 4-(diphenylphosphino)styrene), were tested with regards to their ability to extract palladium. Both polymers showed relatively low extraction conversions of approximately 18% and 30%, respectively. However, the addition of piperidine as activator for p(FDA--DPPS) allowed for an increase in the extraction conversion of up to 60%.
贵金属，特别是钯，在工业中有广泛的应用。由于其稀缺性，贵金属必须进行回收，最好采用绿色、节能的回收工艺。本文描述了使用超临界 CO（scCO）辅助的配位聚合物从一种含有约 2 重量%（重量%）钯（100% PdO）的铝硅酸盐负载催化剂中提取钯。测试了两种聚合物，即 p(FDA)SH 均聚物和 p(FDA--DPPS)共聚物（FDA：1,1,2,2-四氢全氟代正丁基丙烯酸酯；DPPS：4-（二苯基膦基）苯乙烯），以评估它们提取钯的能力。两种聚合物的萃取转化率都相对较低，分别约为 18%和 30%。然而，向 p(FDA--DPPS)中添加哌啶作为活化剂，可将萃取转化率提高至 60%。
