Recovery method for used SCR denitration catalyst

摘要

The present invention proposes a method capable of realizing the re-preparation of a used SCR denitration catalyst and separating and recovering and purifying valuable components such as vanadium, tungsten, and molybdenum as required. First, a used SCR denitration catalyst is pretreated, and catalyst components such as impurities and activated vanadium tungsten molybdenum are removed and leached. Get. By simultaneously purifying valuable components in the leachate and adjusting the ratio of each substance content to prepare a mixture of catalyst components, a new catalyst can be prepared and re-prepared, and in the leachate The valuable elements in the leachate are processed into resources by the method of separating and refining each valuable element and preparing a different product. [Selection] Figure 1