Solvent extraction refining of petroleum products

Solvent for refining of residues

Solvent recovery process for N-methyl-2-pyrrolidone in hydrocarb

Solvent refining of residues

Solvent refining process

Specific gravity responsive control of BMCI in aromatic extract

Stabilization of hydrocracked lube oils

Step-wise supercritical extraction of carbonaceous residua

Stripping steam recycle for solvent recovery processes

Supercritical extraction process

Supercritical process for producing deasphalted demetallized and

Supercritical selective extraction of hydrocarbons from asphalti

Thermal stabilization of N-methyl-2-pyrrolidone

Three phase removal of halides from liquid hydrocarbons

Three-stage process for deasphalting resid, removing fines from

Trace solvent recovery in selective solvent extraction

Treating of a crude containing natural gas

Treatment and separation of petroleums and related materials

Treatment of viscous crude oils

Treatment of viscous crude oils