Selective extraction using mixed solvent system

Selective removal and recovery of ammonia and hydrogen sulfide

Selective vaporization process

Selective vaporization process

Selective vaporization process and dynamic control thereof

Separating basic asphaltenes using Bronsted acid transition meta

Separating basic asphaltenes using transition metal oxide acid c

Sequential residue hydrodesulfurization and thermal cracking ope

Shale oil process

Simultaneous catalytic hydrocracking and hydrodewaxing of hydroc

Simultaneous catalytic hydrocracking and hydrodewaxing of hydroc

Simultaneous hydroprocessing of two feedstocks

Single-stage hydrotreating process

Single-stage hydrotreating process for converting pitch to conve

Slurry hydroconversion process

Slurry hydrogen treating processes

Slurry treatment of a gas oil or kerosene feed stock for a steam

Solvent extraction of lubricating oils

Steam cracking of hydrotreated and hydrogenated hydrocarbon...