采用恒择性溶解工艺，解决了 Pt-Re 重整废催化剂再生利用过程中铂铼分离难的问题。经实验悁究，确定了废催化剂焙烧预处理的最佳条件为500℃下焙烧3 h，用20%硫酸溶解废催化剂，加入适量的硫酸恸铁抑制铂溶解，铼的溶解率可达98%，铂的溶解率为0.8%，渣率仅为7%，实现了铂和铼的分离，有利于铼的精炼提纯及铂的富集。
The hurdles of platinum-rhenium separation in the recovery process of spent Pt-Re reforming catalyst have been overcome by a selective dissolving technology. The technology involves roasting the spent catalyst at 500℃ for 3 hours, followed by dissolving Re in 20%sulfuric acid solution. Co-dissolution of Pt can be inhibited by addition of certain amount of ferrous sulfate. Under these conditions, effective separation of platinum from rhenium can be achieved. 98% of rhenium in spent Pt-Re reforming catalyst is converted into the solution and platinum dissolution is reduced to 0.8%, while the residue rate is only 7%.
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