Around the world, most of the benzene, toluene and xylene are produced in the catalytic reforming unit of the refinery. In China, almost all of the reforming units produce aromatics, and have aromatics extraction unit.

In aromatic extraction process and sulfolane is one of the best solvent, which has a high solubility and selectivity to aromatic hydrocarbons, the difference of the boiling points and the density between sulfolane and the raw oil or the aromatics in gasoline are big, Futhermore the latent heat of evaporation, specific heat, thermal stability and chemical stability of the sulfolance are good, so it can achieve a high yield of aromatic hydrocarbons, two-phase stratified and solvent recovery to reduce the consumption of energy and solvent.

However sulfolane in industrial will be gradually deteriorated that becomes a prominent issue and can not be avoid. The main problems are: dark color of sulfolane,, decreased pH, corrosion and scale of equipment, degradation of the extraction performance, These problems seriously affect the normal operation of the unit, and increase the solvent loss. Currently measures widely used in the domestic and abroad are: (1) Add mono ethanol amine to slow down the drop of pH and the corrosion of the equipment; (2) Control the temperature of the system to be below 180 °C; (3) Utilize a regeneration tower to remove the settle-able particles. However, the impact of these measures is not remarkable.

The products and services we provided include: sulfolane filtration and purification that. will remove suspended solids, acid and other pollutants from the sulfolane reagent. It can reduce corrosion and maintain a stable operation. This is the only way to keep the purity of sulfolane.