PROCESS FOR RECOVERY AND RECYCLING OF MATERIALS CONSTITUTING MEMBRANES FOR SEPARATION OF HYDROGEN

摘要

A process for recovery and recycling of materials constituting membranes for separation of hydrogen envisages a leaching stage where the tubular-membrane module is leached in an acid solvent for maximum dissolution of silver and palladium, which constitute the selective barrier of the module, reducing to a minimum deterioration of the steel substrate of the module itself, and then a treatment of the leaching liquor to obtain calcium nitrate after removal of both the palladium and the silver leached during the hydrometallurgical treatment. The purpose is to reduce the cost of the modules as a whole through a process of recovery and recycling of the various components.