The use of gas-liquid chromatography for selecting extractive solvents for liquid extraction processes

Abstract Gas-liquid chromatography is used for the selectivity determination of various solvents. The group selectivity of 28 solvents in the separation of cyclic and aliphatic sulfides from the hydrocarbons is investigated. The solvents containing —OH and —NH 2 groups were found to be the most selective in separating the cyclic sulfides and monocyclic aromatic hydrocarbons. The data obtained allowed an extractive solvent (phenol) to be chosen for separating the cyclic sulfides from the kerosene-gas-oil fractions. With the straight-run petroleum fraction 275–350° the possibility of obtaining the sulfide concentrates with the help of liquid extraction is experimentally confirmed.