Investigation on Intensification of Distillation With Additives Rich in Aromatics

Abstract

The effects of the additives rich in aromatics on the intensification of vacuum distillation were investigated with the viscosity measurement, a simulated distillation analyzer, a Kjeldahl vacuum distillation unit and a True Boiling Point distillation unit. The temperature of liquid phase could influence the effects of additives. The hot-stage microscope was adopted to study qualitatively the intensification mechanism of the additives. When the temperature was lower than 320'C, it was found that the additives could help the lighter fractions going out which had been adsorbed by the core and constituted the outer layers of the colloidal particles. Nevertheless, when the temperature was high (above 380'C), the colloidal particles in the atmospheric residue almost disappeared and the distillation yield could not be increased obviously by the additives.

Characterization of Petroleum Residues with Varying Cutting Depth and Corresponding Vacuum Distillates Derived from Laboratory Deep-Vacuum Fractionation of Unconventional Heavy Oil for an Instructive Utilization Guideline

“…The viscosity changing tendency of feedstocks illustrates that even refineries used to process heavy oil might suffer from the significant property differences between the VNHO and conventional heavy oil, and implies that the escape of relatively light distillates from the feedstock in distillation units would very probably be thwarted by the strong "cage effect" resulting from the adhesion force between polar functional groups. 30 3.2. Characterization of Petroleum Residues and Corresponding Vacuum Distillates.…”

“…When the cut temperature reaches 500 °C, the viscosity of the residue (58530 mm 2 /s) is more than 40 times that of the Gudao residue (1403 mm 2 /s). The viscosity changing tendency of feedstocks illustrates that even refineries used to process heavy oil might suffer from the significant property differences between the VNHO and conventional heavy oil, and implies that the escape of relatively light distillates from the feedstock in distillation units would very probably be thwarted by the strong “cage effect” resulting from the adhesion force between polar functional groups …”

A destilação simulada na indústria do petróleo

“…Na indústria do petróleo, a destilação é o processo de separação mais utilizado. O conhecimento dos dados de distribuição dos pontos de ebulição dos componentes de óleos crus e de produtos do processo de refino do petróleo é essencial para o controle desse processo e a garantia da qualidade do mesmo [2][3][4] . Os primeiros procedimentos de destilação, padronizados pela "American Society for Testing and Materials" (ASTM), datam de 1926 5 .…”

Viscosity measurement of industrial oils using the droplet quartz crystal microbalance

“…Viscosity is an important parameter for analytical research and process engineering, covering the range 10 −4 Pa s (organic solvents) to 10 12 Pa s (cooling silicate glass). It is used extensively to characterize polymers [1][2][3], for physicochemical analysis [4], to establish the pumping characteristics of waste slurries [5], in food research [6,7], liquid crystal research [8,9], in biochemistry [10], for the investigation of low temperature phenomena [11], in fuel oil research [12,13], paper technology [14], glass technology [15], blood analysis [16], crystal growth [17] and in steel processing [18].…”