Multi component distillation

Perhaps the best-known example of this approach for multi-component distillation is the method of Wang and Henke (JL). 

Determining the number of stages and reflux ratio for multicomponent distillations is more complex than for binary mixtures. In multi-component distillation with the feed containing more than two components, it is often difficult to specify the complete composition of the top and bottoms products. The separation between the top and... 

The discussion in this chapter centers around multi-component distillation with conventional columns, that is, columns with a single feed and overhead and bottoms products. In general, such columns have a condenser and a reboiler, although the special cases of rectifiers and reboiled strippers are also considered. 

As will be shown later, the average relative volatility of a key component in the overhead or distillate product to that of a key component in the bottoms product can be used to estimate the minimum number of stages for a multi-component distillation. 

Holland, C. D., Unsteady State Processes with Applications in Multi-component Distillation, Prentice-Hall, Inc., Englewood CliflFs, N.J., 1966. 

A method for the exact calculation of the minimum plate number in a multi-component distillation is reported by Chien [175b]. An approximate method was developed, by Serov et al. [175a]. 

When you go to a refinery, if s 85% distillation. You are dealing with complex mixtures and we both thought that some research on multi-component distillation was in order. I had been thinking about this area for a long time and had worked out a theory in my head. Like with the modulus, two other people had rival ideas. When our paper was first published, it seemed too long and there were very few applications. I think it was ahead of its time. Later, when computers became available, our work proved very useful. 

Akashah, S., J.H. Erhar, and R.N. Maddox, Optimum feed plate location for multi component distillation separations. Chemical Engineering Communications, 1979, 3 (6) 461 468. 

F Shortcut Method for Minimum Reflux Ratio for Multi-component Distillation... 

Separation of Hydrogen Isotopes by Multi-component Distillation (3) 58 Pilot Plant Studies of the Low Temperature Distillation of Hydrogen Isotopes... 

Designing for Safety in Hydrogen Bubble Chambers (2) 336 Hydrogen Liquefaction Cycles (3) 1 Removal of Nitrogen from Hydrogen with Silica Gel at Low Temperatures (3) 11 Separation of Hydrogen Isotopes by Multi-component Distillation (3) 58 Beech Aircraft 6000 Liter Liquid Itydrogen Dewar (3) 232... 

TAY 69] Taylor D.L., Edmister W.C., General solution for multi-component distillation processes , Proceedings of the International Symposium on Distillation, Brighton, UK, 1969. 

Holland, C.D. Fundamentals and Modeling of Separation Processes, Englewood Chlfs, NJ, Prentice HaU, 1975. Holland, C.D. Fundamentals of Multi-component Distillation, New York, McGraw-HiU, 1981. 

Holland, C.D. Multi-component Distillation, Englewood Cliffs, NJ, Prentice HaU, 1963. 

The graphically based shortcut methods for binary batch distillation may be applied to multi-component distillation only when the separation is between two key components to produce one distillate product and the residue. In this case the calculations may be approximated by lumping the other components with either of the key components and treating the system as a pseudo-binary. 

Design and simulate multi-component distillation columns using rigorous and shortcut distillation methods (c, e, k). 

Svrcek, W. Y. and Morris, C. G. Dynamic simulation of multi-component distillation. Can. 

Key components in a multi-component distillation are those whose relative volatilities are such that they determine the component split into the vapor and hquid phases. These components tend to appear in both the vapor and hquid phases while other components wiU appear largely in either one phase or the other. The key component appearing mostly in the vapor phase is caUed the "light key," while the key component in the hquid phase is termed the "heavy key." All other components are termed "non-keys." For cmde stabilizers, it is convenient to use normal butane nC ) or iso-pentane (iCs) as the heavy key and propane (C3) or iso-butane (1C4) as the hght key. 

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