1.19 A mixture of ethylbenzene (EB) and the three isomers (ortho, meta, and para) of xylene are widely available in petroleum refîneries. (a) Based on the differences in normal boiling points, verify that the separation between meta-xylene (MX) and para- xylene (PX) by distillation is far more dificult than the separations between EB and PX, and MX and ortho- xylene (OX) (b) Prepare a list of properties for MX and PX similar to Table 1.11. From that list, which property differences might be the best ones to exploit to separate a mixture of these two xylenes. (c) Explain why melt crystallization and adsorption are used commercially to separate MX and PX.

Question
1.19 A mixture of ethylbenzene (EB) and the three isomers
(ortho, meta, and para) of xylene are widely available in
petroleum refîneries.
(a) Based on the differences in normal boiling points, verify
that the separation between meta-xylene (MX) and para-
xylene (PX) by distillation is far more dificult than the
separations between EB and PX, and MX and ortho-
xylene (OX)
(b) Prepare a list of properties for MX and PX similar to
Table 1.11. From that list, which property differences might
be the best ones to exploit to separate a mixture of these
two xylenes.
(c) Explain why melt crystallization and adsorption are used
commercially to separate MX and PX.
Expand
Transcribed Image Text

1.19 A mixture of ethylbenzene (EB) and the three isomers (ortho, meta, and para) of xylene are widely available in petroleum refîneries. (a) Based on the differences in normal boiling points, verify that the separation between meta-xylene (MX) and para- xylene (PX) by distillation is far more dificult than the separations between EB and PX, and MX and ortho- xylene (OX) (b) Prepare a list of properties for MX and PX similar to Table 1.11. From that list, which property differences might be the best ones to exploit to separate a mixture of these two xylenes. (c) Explain why melt crystallization and adsorption are used commercially to separate MX and PX.

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