Resid deasphalting with liquefied gas

Butanes and pentanes used as solvents in deasphalting processes have the advantage of the possibility of adjusting their extraction properties and thus obtain deasphalted oils which are suitable for feedstocks or catalytic cracking. This work aims at establishing the basic relationships governing the deasphalting process in heavy liquified petroleum gas in the example of isobutane. The results indicate that the highest quality deasphalted oil can be obtained if the process is carried out at a dilution ratio above the extreme and at the highest possible temperature.