OptiTreating combines the use of commercially available catalysts with Process Associates' patented process design, proprietary know-how, advanced design methods and practical experience to arrive at the most cost effective and optimum process design for both grassroots and revamp hydrotreating applications. OptiTreating technology is available for a wide range of feeds and processing objectives. Severe hydrodesulfurization, hydrodenitrogenation, hydrogenation and metals and CCR removal of straight run and cracked medium and heavy feedstocks. Hydrofinishing of solvent extracted or raw paraffinic neutrals, bright stocks, naphthenic distillates, etc. Fresh liquid feed, makeup hydrogen and recycle gas are heated and contacted with one or more regenerable catalysts in a fixed-bed reactor.
Temperature rise in the reactor is controlled using gas or liquid quench.
Reactor effluent is cooled and separated. Hydrogen-rich gas is recycled. Liquid is stripped to remove light components and hydrogen sulfide, then fractionated into the desired products. Pressures range from 400 to 2,500 psi. Temperatures and space velocities are optimized to meet process objectives.