By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Chemical Engineering. According to news reporting originating in Taipei, Taiwan, by VerticalNews journalists, research stated, "Semiconductor and pharmaceutical industries often produce waste alcohol mixtures. This study discusses a reactive distillation process of a mixed alcohol feed containing n-amyl alcohol and n-hexanol to react with acetic acid to produce useful esters."
The news reporters obtained a quote from the research from the National Taiwan University of Science and Technology, "In an earlier paper (Lee et al. Ind. Eng. Chem. Res. 2009 48, 7186-7204), optimal design of the same Type-III mixed-alcohol reactive distillation process containing n-butanol and n-amyl alcohol was developed. In that paper, the indirect sequence containing a reactive distillation column with heavier amyl acetate bottom product and a second column to produce butyl acetate gives the lowest total annual cost. In this study, with different mixed alcohol feed (although of the same reaction type), it is found that an alternative direct sequence design is much more economically favorable with 34% reduction in total annual cost as compared to the indirect sequence. The reason for the seemingly contradictory results can be explained by differences in relative volatilities of binary pairs in the stripping sections of the reactive distillation towers. Process intensification technology is also attempted to devise a thermally coupled reactive distillation configuration to further save 13% of the operating energy."
According to the news reporters, the research concluded: "The overall control strategy using tray temperatures is also proposed to maintain high-purity products despite various disturbances."
For more information on this research see: Design and Control of Thermally-Coupled Reactive Distillation System for Esterification of an Alcohol Mixture Containing n-Amyl Alcohol and n-Hexanol. Industrial & Engineering Chemistry Research, 2013;52(48):17184-17197. Industrial & Engineering Chemistry Research can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Industrial & Engineering Chemistry Research - www.pubs.acs.org/journal/iecred)
Our news correspondents report that additional information may be obtained by contacting Y.C. Wu, Natl Taiwan Univ Sci & Technol, Dept. of Chem Engn, Taipei 10607, Taiwan. Additional authors for this research include H.Y. Lee, C.H. Lee, H.P. Huang and I.L. Chien.
Keywords for this news article include: Asia, Taipei, Taiwan, Chemical Engineering
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