förfarande for framställning av i ombildningskatalysator for kolväten samt enligt förfarandet framställd katalysator

摘要

Hydrocarbon reforming catalysts are made by calcining synthetcially prepared hydrous refractory inorganic oxide and then compositing with a platinum-group metallic component and chlorine in amounts so as to impart to the final catalyst between 0,75 and 1,75% by weight, calculated as elementary chlorine, of combined chloride and between 0,01 and 2% by weight of platinum-group metal, and oxidizing the fluoride-free composite containing chlorine as the sole halogen component at a temperature of 204-316 DEG C. for a period of at least one hour and until the volatile matter content thereof is decreased to a level below 5,0% by weight, the oxidizing temperature thereafter being increased to a level of 371-538 DEG C. and oxidizing the composite at the increased temperature for at least one hour and until the volatile matter content of the final catalyst is decreased to a level below 2,0% by weight. By platinum-group metal is meant Pt, Pd, Ir, Os, Rh and Ru. Examples are given of refractory oxides and include Al2O3, SiO2, ZrO2, MgO, B2O3, ThO2, TiO2, SrO2 and mixtures thereof. Specification 693,648 is referred to.