Production of high-quality catalytic reforming feed stock by deep hydrogenation of secondary-process gasolines

Conclusions

As a result of experiments on the deep hydrogenation of thermally cracked gasoline from the visbreaking and delayed coking of tar from high-sulfur Arlan crude on an industrial alumo-cobalt-molybdenum catalyst it was established that to obtain a high-quality feedstock for catalytic reforming from these gasolines the purification must be done in two stages.

With purification of the feedstock in Stages I and II it is recommended to maintain, correspondingly, the following parameters: pressure 50 and 30 atm, temperature 380–420 and 380–400°C, space velocity of feed of feed-stock 2 and 5–6 h⁻¹, circulation of hydrogen containing gas 500 and 100 liter/liter feedstock.

After two-stage purification, the catalytic reforming feedstock contains not more than 0.003 wt. % sulfur and 0.0002 wt. % nitrogen; the iodine number does not exceed l g I₂/100 g product.