Treating processes Hydrofining

Virgin naphtha hydrofining processing conditions have been standardized at 550°F, 4 V/hr/V, 300-400 psig and 400-500 SCF/B of 70% H treat gas. Such conditions will make a 4 ppm sulfur product of most stocks of interest. 

It should also be noted that this process does not alter the smoke point. Smoke point is a function of aromatics content and mild Hydrofining does not hydrogenate aromatics. To accomplish this, treating over a more active catalyst such as nickel tungstate at pressures of at least 800 psig is required. 

Benzoraffln A hydrofining process for treating naphtha fractions derived from coal. It is a fixed-bed, gas-phase process using a cobalt/molybdenum oxide catalyst. Developed jointly by BASF, Veba-Chemie, and Lurgi, Ground 1960. 

---