초록 ▼

An asphalt-containing mineral oil can be deasphalted at temperatures above about 80°C. with methanol serving as the deasphalting solvent. Two liquid phases are produced, an asphalt-rich phase and a methanol-rich phase. By cooling the methanol-rich phase to a temperature below 80°C., two additional l

An asphalt-containing mineral oil can be deasphalted at temperatures above about 80°C. with methanol serving as the deasphalting solvent. Two liquid phases are produced, an asphalt-rich phase and a methanol-rich phase. By cooling the methanol-rich phase to a temperature below 80°C., two additional liquid phases are produced, an oil-rich phase and a methanol-rich phase.

대표청구항 ▼

A process for deasphalting an asphalt-containing mineral oil which comprises: (a) contacting an asphalt-containing mineral oil at an elevated pressure and a temperature greater than about 80°C. with an amount of methanol effective to form two liquid phases, a deasphalted oil phase comprising a major

A process for deasphalting an asphalt-containing mineral oil which comprises: (a) contacting an asphalt-containing mineral oil at an elevated pressure and a temperature greater than about 80°C. with an amount of methanol effective to form two liquid phases, a deasphalted oil phase comprising a major amount of the methanol and an asphalt phase comprising a minor amount of the methanol, said pressure and said temperature being effective to maintain the methanol in the liquid phase, (b) separating the two phases, and (c) maintaining the deasphalted oil phase at a pressure and a temperature less than about 80°C. for a period of time sufficient to form two liquid phases, a methanol phase and a second deasphalted oil phase comprising a minor amount of methanol, said pressure and said temperature being effective to maintain the methanol in the liquid phase.