酚精制装置正序流程生产减五线蜡油试验分析

目前润滑油加氢装置加工的原料为减二线、减三线及减四线蜡油，减五线蜡油曾经生产过，但由于原料中的多环重芳烃等非理想组分含量较多，增加了润滑油加氢装置的反应苛刻度，降低了催化剂的使用寿命，为此，准备将减五线蜡油先通过酚精制去除里面的非理想组分，再作为润滑油加氢装置的原料，据此进行了本次工业试验。

Modeling of Mass Transfer in Nonideal Multicomponent Mixture with Maxwell-Stefan Approach

The Intalox metal tower packing was used to simulate an industrial relevant extractive distillation column for purifying azeotropic multicomponent mixture.In order to explain the inconsistencies in the modeling of transfer process in nonideal multicomponent distillation column,a method was developed with equilibrium stage models(EQ)and non-equilibrium model(NEQ)incorporated with Maxwell-Stefan diffusion equations in the framework of AspenONE simulator.Dortmund Modified UNIFAC(UNIFAC-DMD)thermodynamic model was employed to estimate activity coefficients.In addition,to understand the reason for the diffusion against driving force and the different results by EQ and NEQ models,explicit investigations were made on diffusion coefficients, component Murphree efficiency and mass transfer coefficients.The results provide valuable information for basic design and applications associated with extractive distillation.