Investigation of Oiling out phenomenon in different Industrial relevant processes

Authors

  • Salman R Naqvi

Keywords:

Oiling out, cooling crystallization

Abstract

Oiling out is a wanted effect during the cooling crystallization of complex molecules from solution: upon cooling, crystallization is preceded by the formation of a second liquid phase (Oiling out) which disturbs the crystallization process and often deteriorates the product properties. On the basis of the crystallization of 4,4' dihydroxydiphenylsulfone (DHDPS) from water/acetone, water/1-propanol and water/ethanol mixtures, respectively. This study proved the dependence of the oiling-out behavior on the solvent system. Attempts were made to model the oiling-out phenomenon using a thermodynamic equation of state here: (Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT)). Applying this model, an oiling-out behavior of the ternary system DHDPS/water/ethanol could be predicted qualitatively. Exchanging the water/acetone, water/1-propanol solvent mixtures by a mixture of water and ethanol led to a prevention of oiling out. This could be predicted by the calculations using PC-SAFT, as well as confirmed experimentally.
JPIChE

Downloads

Published

2011-02-15

How to Cite

Naqvi, S. R. (2011). Investigation of Oiling out phenomenon in different Industrial relevant processes. Journal of the Pakistan Institute of Chemical Engineers, 38(1), 55–62. Retrieved from http://piche.org.pk/journal/index.php/jpiche/article/view/24

Issue

Vol. 38 No. 1 (2010): Journal of the Pakistan Institute of Chemical Engineers

Section

Articles

License

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).