| The present invention relates to a heterogenic rhenium containing catalyst suited particularly to the metathetic reactions of hydrocarbons. |
| The refractory metals include niobium, tantalum, molybdenum, tungsten, and rhenium. |
| General Electric, one of the world's biggest makers of jet engines, has spent years developing nickel-based superalloys to replace rhenium. |
| Its melting and boiling points are third highest among all elements after tungsten and rhenium. |
| It uses neural network modelling to predict the impact very expensive additives such as rhenium and platinum might have on the heat resistance of superalloys. |
| Finally, a relatively small amount of rhenium is used to make catalysts for the petroleum industry. |
