“Selective” Hydrotreating of Catalytic Naphtha Cuts

Abstract

To ensure a sulfur content on the level of 0.05–0.10 wt. % in catalytic naphthas, hydrotreating technology has been developed for hydrogenating primarily sulfur compounds and diolefin hydrocarbons. Monoolefinic hydrocarbons are converted to an insignificant degree, which preserves the high octane number of the naphtha obtained. The process is conducted at a pressure of 2–3 MPa, temperature of 250–350°C, and feedstock space velocity of 5–10 h⁻¹. The possibility of “selective” hydrotreating of mixed catalytic and thermal naphthas was demonstrated. The technology has been industrially tested with positive results.