Catalysts

Platinum - the best catalyst of reaction of oxidation of ammonia to a NO nitrogen oxide in one of the main processes of production of nitric acid. The catalyst appears in the form of a grid from a platinum wire with a diameter of 0,05 here... 0,09 mm. The rhodium additive is entered into material of grids (5... 10%). Use also a threefold alloy - 93% of Pt, 3% of Rh and 4% of Pd. The rhodium additive to platinum increases mechanical durability and increases grid service life, and palladium reduces the price of the catalyst and a little a little (on 1... 2%) its activity raises. Service life of platinum grids - a year and a half. After that old grids send to refinery on regeneration and establish new. Production of nitric acid consumes significant amounts of platinum.