Insitu fluorination of catalyst beds - with control of fluorine proportion absorbed and temp. gradient (NL201076)

摘要

fluorination of catalysts in fixed beds with provision of a constant or variable fluorine displacement (SA= wt. % of added fluorine not absorbed by the bed), opt. in combination with a positive temp. gradient along the bed, in which (a) average value of SA is =10 wt.% (b) the opt. temp. gradient (G) is =30 degrees C., (c) the product of SA and G is =1000, (d) where SA is 40 wt.%, G is =300/SA, and (e) where SA is =40 but 50, G is =3/4 (50-SA). Used for activation of catalysts for catalytic conversion of hydrocarbon fractions at elevated temps. and pressures in presence of hydrogen. a more uniform distribution of fluorine through the catalyst is achieved, with ratio of F content at the end of the bed to that at the beginning of 0.5-1.5:1.