Improvement of separation process of synthesizing MIBK by the isopropanol one-step method
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The separation process of synthesizing MIBK (methyl isobutyl ketone) by an isopropanol one-step method, in which the multi-component mixture contains AC (acetone), IPA (isopropanol), water, MIBK, MIBC (methyl isobutyl carbinol), DIBK (di-isobutyl ketone), etc., was studied. As a high-purity of MIBK over 99.5 wt% is required in industry, the development of an effective separation method is urgent. In this work, first, by means of VLE (vapor-liquid equilibrium) experiments and PROII simulation, the possible azeotropes formed in the investigated system were tested. Then, the separation process was simulated with the result that the calculated and designed values were in good agreement, which indicated that the calculated results were reliable. On this basis, the original separation process was improved. In the original separation process, the yield of MIBK for a concentration of MIBK over 99.5 wt% was small, only 32.5%. In the improved separation process (step two), two columns (one extractive distillation column and the other solvent recovery column) were added and some simplification was made so as to recycle MIBK. In this case the yield of MIBK was 91.7%. Moreover, about 27.6% water stream per kilogram MIBK product is saved.
Key wordsIsopropanol MIBK One-step Method Process Improvement Distillation
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- Chen, L. L.,Solvent handbook, Chemical Industry Press, Beijing (1997).Google Scholar
- Lei, Z. G., Li, C. Y. and Chen, B. H., “Comments on the paper ’simulation of the aromatic recovery process by extractive distillation’ (Ko, M., Na, S., Cho, J. and Kim, H.,Korean J. Chem. Eng., 19,996 (2002),” Korean J. Chem. Eng., 20,1077 (2003b).Google Scholar
- Lei, Z. G., Chen, B. H. and Ding, Z. W.,Special distillation processes, Elsevier, Amsterdam, 1 (2005).Google Scholar
- Liang, C., “Production and market analysis of methyl isobutyl ketone,”Mod. Chem. Ind. (China),19(9), 36 (1999).Google Scholar
- Mulas, G., Deledda, S. and Cocco, G., “The mechanochemical conversion of acetone to methyl isobutyl ketone over Cu-Mg based substrates,”Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process,267, 214(1999).Google Scholar
- Resa, J. M., Gonzalez, C., Betolaza, M. A. and Ruiz, A., “Behaviour of butyl ether as entrainer for the extractive distillation of the azeotropic mixture propanone+dissopropyl ether. isobaric VLE data of the azeotropic components with the entrainer,”Fluid Phase Equilib.,156, 89 (1999).CrossRefGoogle Scholar
- Wang, X. Q., “Production technology and application of methyl isobutyl ketone,”Petrochem. Technol. (China),31, 393 (2002).Google Scholar