restructuring
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What is the control range for the C5 content in reformed depentanized oil? What are the effects of a high pentane content (other than losses)? Will C5 have an impact on the selectivity for sulfolane? My process flow is: bottom of pentane removal tower --> reformate distillation tower --> overhead material goes to the extraction unit (sulfolane extraction distillation). Thank you
If the level of C5 is high, can’t the pressure in the carbon removal tower be controlled properly? This is because the saturated vapor pressure of C5 is much higher than that of C6; if C5 enters the extraction distillation tower, the entire tower becomes unstable
In our plant, during simulation, it is generally specified that the C5 mass fraction at the bottom of the pentane column should not exceed 1%; this value is even lower in the process package.
There seems to be no fixed criteria for this; the main function of the depentane tower is to separate components with carbon numbers 5 and below from those with carbon numbers 6 and above, with the top of the tower being used to ensure that the level of carbon number 6 components does not become too high. Of course, a high level of C5 in the components at the bottom of the tower has an adverse effect on both the subsequent carbon removal tower and the extraction tower.