Filter cake washing: Partial dissolution of organic particles and real-time monitoring based on Raman spectroscopy

Marjatta Louhi-Kultanen*, Haiyan Qu, Nina Salmela, Juha Kallas, Lars Nyström

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

6 Sitaatiot (Scopus)

Abstrakti

The partial dissolution of crystalline material during filter cake washing can affect greatly on the cake permeability in separation and purification processes. Besides decreasing the cake thickness, the dissolving may cause changes in the cake structure as it may alter the particle size distribution based on the fact that different sized particles have different dissolution rates. This is especially the case if the cake consists of particles having a wide particle size distribution. The present work introduces a model based on mass transfer to predict the dissolution rates of crystalline material having different solubility in various washing liquors. The filtration system studied experimentally was ground sucrose filtered from ethanol solution. In addition, inline monitoring of the filtration and cake washing with a Raman spectrometer immersion probe was carried out. The studied impurity was cyclohexane. The measuring method allowed measuring of the ternary compound system: the impurity, the concentrations of the mother liquor and the solid in the filter cake.

AlkuperäiskieliEnglanti
Sivut270-276
Sivumäärä7
JulkaisuSeparation and Purification Technology
Vuosikerta59
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 1 maaliskuuta 2008
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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