| 摘要 |
<p>The invention relates to the production of catalyzers for converting SO2 into SO3 using worked-out vanadium catalyzers. The method consists of leaching active components in pulp, their separation from a solid sediment by filtration, the treatment of the filtrate and the sediment, its mixing with the active components of the filtrate the introduction of components of a fresh contact mass, and drying and forming. The aim is to increase the utilisation of the worked-out catalyzer while maintaining its high performance characteristics . To this end the sediment is treated after filtration with an alkali solution with a mole ratio SiO2(K2O+Na2O)-V2O5 of 2.5 to 29.8, with a subsequent co-precipitation of SiO2 and V2O5 with the help of the filtrate or sulphuric acid. V2O5 can be precipitated from the filtrate with the help of the alkali and then used for mixing with the active components. In the degree of extraction of SiO2 is equal to 1.0, the worked-out vanadium catalyzer can be used without being crushed.</p> |
