Page 239 - Distillation theory

P1: FCH/FFX P2: FCH/FFX QC: FCH/FFX T1: FCH
0521820928c06 CB644-Petlyuk-v1 June 11, 2004 20:17

References 213

set flow rate of entrainer – to determine the modes of minimum and maximum
reflux number (R min and R max ).

6.11. Questions

1. Let at sides 1-2 and 2-3 of the concentration triangle be a region of order of
components Reg 132 . Is it possible to use extractive distillation to separate this
ord
ternary mixture? Which component can be the entrainer? The top product?
2. Let at sides 1-2 and 2-3 of the concentration triangle be a region of order of
components Reg 231 . Which process can be used to separate this mixture? How
ord
should the components be distributed among the products? Which component
should be the entrainer?
3. In the concentration tetrahedron and its faces, there is a region of order of com-
ponents Reg 1234 . Which sharp extractive splits are feasible for this mixture?
ord
4. In the concentration tetrahedron and at its edges 1-2 and 3-4, there is a region of
order of components Reg 1234 . Is it possible to use a “Petlyuk column” to separate
ord
this mixture into components? What minimum number of sections should this
column have?

5. Write the trajectory of an extractive distillation column at separation of a four-
component mixture at minimum reflux, bottom feeding being the control one.
6. Write the trajectories of heteroazeotropic and heteroextractive distillation; indi-
cate the components present and absent in the product points and in trajectory
tear-off points.

References

Agrawal, R. (1996). Synthesis of Distillation Column Configurations for a Multi-
component Separation. Ind. Eng. Chem. Res., 35, 1059–71.
Agrawal, R. (1999). More Operable Fully Thermally Coupled Distillation Column
Configurations for Multicomponent Distillation. Trans IChemE., 77, Part A,
543–53.
Agrawal, R., & Fidkowski, Z. T. (1998). More Operable Arrangements of Fully
Thermally Coupled Distillation Columns. AIChE J., 44, 2565–81.
Agrawal, R., Woodward, D. W., & Modi, A. K. (1997). Coproduction of High Pu-
rity Products Using Thermally-Linked Columns. In Distillation and Absorption
Conference. Maastricht, pp. 511–520.
Amminudin, K. A., Smith, R., Thong, D. Y.-C., & Towler, G. P. (2001). Design
and Optimization of Fully Thermally Coupled Distillation Columns. Part 1:
Preliminary Design and Optimization Methodology. Trans. IChemE., 79, Part
A, 701–15.
Barnes, F. G., Hanson, D. N., & King, C. J. (1972). Calculation of Minimum Reflux
for Distillation Columns with Multiple Feeds. Ind. Eng. Chem. Process Des.
Dev., 11, 136–47.
Bauer, M. H., & Stichlmair, J. (1995). Synthesis and Optimization of Distillation
Sequences for the Separation of Azeotropic Mixtures. Comput. Chem. Eng., 19,
515–20.