Simultaneous Reaction-Separation in a Microchannel Reactor with the Aid of a Guideline Structure

A microchannel with two inlets and two outlets was tested as a potential reactor to carry out two-phase catalytic phase transfer reaction with phase separation at the exit of the microchannel. The catalytic phase transfer reaction between benzyl chloride and sodium sulfide was chosen as a model reaction. The effect of operational time on the conversion was studied. By utilizing a multiphase parallel flow inside the microchannel reactor with the aid of a guideline structure, the catalytic phase reaction followed by phase separation could be ensured. The organic phase could be separated completely from one exit and part of the aqueous phase was separated purely and could be reused with slightly affecting the catalytic phase transfer reaction.





References:
[1] A.I. Stankiewicz, and J.A Moulijn, "Process Intensification:
Transforming Chemical Engineering," Chem. Eng. Prog., vol. 96, pp.
22-34, Jan. 2000.
[2] S. Becht, R. Franke, A. Geibelmann, and H. Hahn, "An industrial view
of process intensification," Chem. Eng. and Processing, vol.48, pp.
329-332, 2009.
[3] M.M. Sharma, "Strategies of conducting reactions on a small scale.
Selectivity Engineering and process Intensification, "Pure Appl.
Chem., vol. 74, no. 12, pp. 2265-2269, 2002.
[4] J-C. Charpentier, "Process intensification by miniaturization," Chem.
Eng. Technol. vol. 28, no. 3, pp. 255-258, 2005.
[5] W. Ehrfeld, V. Hessel and H. Lowe, Microreactors: New Technology
for Modern Chemistry, Wiley-VCH, Weinheim, 2000.
[6] C. N. Baroud, and H. Willaime., "Multiphase Flows in Microfluidics,"
C.R. Physique, vol. 5, pp. 547-555, 2004.
[7] S. Aljbour, T. Tagawa, M. Matouq and H. Yamada,
"Surfactant-assisted two phase flow for a reaction separation system in
Microchannel Reactor," Front. Chem. Eng. China, vol. 3, no. 1, pp.
33-38, 2009.
[8] T. Tagawa, S. Aljbour, M. Matouq, and H. Yamada, "Micro-channel
reactor with guideline structure for organic aqueous binary system,"
Chem. Eng. Sci., vol. 62, pp. 5123-5126, 2007.
[9] V. Reddy, and J. D. Zahn, "Interfacial Stabilization of
Organic-Aqueous Two-phase microflows for a miniaturized DNA
extraction". J. of Colloid and interface Science, vol. 286, pp. 158-165,
2005.
[10] J.R. Burns, and C. Ramshaw; "The intensification of rapid reactions in
multiphase systems using slug flow in capillaries," Lap on a Chip,
vol.1, pp. 10-15, 2001.