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Heterogeneously catalyzed conversion combined with solvent extraction: An inventive approach for isolating dilute constituents
Author(s) -
Grafschafter A.,
Painer D.,
Siebenhofer M.
Publication year - 2018
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201855375
Subject(s) - chemical technology , solvent extraction , chemical engineering , chemistry , engineering , extraction (chemistry) , manufacturing engineering , organic chemistry
For successful combination of a heterogeneously catalyzed conversion combined with solvent extraction impeded in a continuous process, appropriate requirements to apparatus design for three-phase operation are necessary. The Taylor-Couette Disc Contactor (TCDC) is expected to meet the requirements of intensive three-phase contact. The construction principle of the TCDC does not provide dead zones for accumulation of solids and crud, and it offers excellent mixing properties for solid/liquid/liquid contact. The rotating shaft does induce formation of stapled toroidal vortices with a hydrodynamic shear gap in between. Solid catalysts of higher density compared to the continuous phase collect in this shear gap, providing acceleration of heterogeneously catalyzed reactions. Low density solvents are dispersed and trapped in the vortices and may contribute to intensification of conversion by collecting the products. To gain design rules and for modeling purposes the effect of the hydraulic load, rotational speed and phase ratio on residence time distribution were investigated in detail. Analysis of the residence time distribution of the continuous phase suggests application of the tank-in-series model.