The production of diacetone alcohol with catalytic distillation: Part II: A rate-based catalytic distillation model for the reaction zone

The aldol condensation of acetone to diacetone alcohol (DAA) has been accomplished with catalytic distillation (CD). A steady-state, rate-based model for the reaction zone of the CD column is developed and fitted to the experimental data which were presented in Part I of this paper. This model is un...

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Bibliographic Details
Published inChemical engineering science Vol. 53; no. 5; pp. 1077 - 1088
Main Authors Podrebarac, G.G., Ng, F.T.T., Rempel, G.L.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.03.1998
Elsevier
Subjects
aldol condensation
Applied sciences
Catalysis
Catalytic distillation
Catalytic reactions
Chemical engineering
Chemistry
diacetone alcohol
Distillation
Exact sciences and technology
General and physical chemistry
mesityloxide
rate-based model
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
rate-based model
aldol condensation
diacetone alcohol
Catalytic distillation
mesityloxide
Catalytic reaction
Base catalysis
Anionic resin
Selectivity
Dehydration
Mass transfer
Aldol condensation
Heterogeneous catalysis
Kinetic model
Distillation with reaction
Simulation
Catalyst activity
Acetone
Successive reaction
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Summary:The aldol condensation of acetone to diacetone alcohol (DAA) has been accomplished with catalytic distillation (CD). A steady-state, rate-based model for the reaction zone of the CD column is developed and fitted to the experimental data which were presented in Part I of this paper. This model is unique in that it considers external mass transfer between the liquid phase and the catalyst surface. The main purpose of this model is to predict production rates and product selectivities. The formation of DAA proved to be an excellent system for the study of external mass transfer effects in catalytic distillation. The model fits the experimental data quite well, but could not be applied a priori due to the random nature of flow patterns in packed columns. However, it may be possible to predict the performance of larger diameter columns since liquid distributors improve the reproducibility of the flow pattern.
ISSN:0009-2509
1873-4405
DOI:10.1016/S0009-2509(97)00428-4