초록 ▼

Solvents comprising C3, C4, C5 and C6 aliphatic hydrocarbons (i.e. propane, propylene, butane, butylene, pentane, cyclopentane, pentene, hexane, cyclohexane, hexene and their isomers) and mixtures thereof, preferably C3 and C4 hydrocarbons and mixtures thereof are recovered from hydrocarbon oils in

Solvents comprising C3, C4, C5 and C6 aliphatic hydrocarbons (i.e. propane, propylene, butane, butylene, pentane, cyclopentane, pentene, hexane, cyclohexane, hexene and their isomers) and mixtures thereof, preferably C3 and C4 hydrocarbons and mixtures thereof are recovered from hydrocarbon oils in the liquid phase by the reverse osmosis permeation of said solvent through a polyimide reverse osmosis membrane at low temperature.

대표청구항 ▼

A method for recovering solvents selected from the group consisting of C3, C4, C5 and C6 aliphatic hydrocarbons and mixtures thereof from oil, said method comprising contacting the solvent containing oil with one side of a reverse osmosis membrane under reverse osmosis conditions and a temperature b

A method for recovering solvents selected from the group consisting of C3, C4, C5 and C6 aliphatic hydrocarbons and mixtures thereof from oil, said method comprising contacting the solvent containing oil with one side of a reverse osmosis membrane under reverse osmosis conditions and a temperature between about 20°C. and the cloud point of the oil feed to thereby selectively permeate the solvent through the membrane, and recovering the solvent as permeate for reuse.