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Conceptual Design of a Separation Process for Higher Alcohols Made by Catalytic Condensation of Ethanol | OMICS International | Abstract
ISSN: 2090-4568

Journal of Advanced Chemical Engineering
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Research Article

Conceptual Design of a Separation Process for Higher Alcohols Made by Catalytic Condensation of Ethanol

Venkat K. Rajendran, Andreas Menne and Axel Kraft*

Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, Germany

Corresponding Author:
Axel Kraft
Fraunhofer Institute for Environmental
Safety and Energy Technology UMSICHT
Osterfelder Str. 3, D-46047 Oberhausen, Germany
Tel: 49-208-8598-14
E-mail: [email protected]

Received date: May 22, 2012; Accepted date: June 18, 2012; Published date: June 25, 2012

Citation: Rajendran VK, Menne A, Kraft A (2012) Conceptual Design of a Separation Process for Higher Alcohols Made by Catalytic Condensation of Ethanol. J Adv Chem Eng 5:134. doi:10.4172/2090-4568.1000134

Copyright: © 2012 Rajendran VK, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


A downstream process for the separation of n-butanol from a product mixture containing unreacted ethanol, higher alcohols, aldehydes, water and traces of other chemical species was studied and therewith a conceptual design for the separation train has been devised. A novel approach and a newly developed catalyst were introduced to produce n-butanol (or iso-butanol) from ethanol as a raw material through an alternative path. The product stream from the reactor outlet consists of various chemical species ranging from saturated alcohol mixture, to aldehydes, to traces of aromatics and high boilers, and is ought to be separated into individual components based on their commercial/industrial applicability. Nine azeotropes of which one being ternary and the remaining eight binary azeotropes were identified between the various product components. Due to the chemical complexity, a multicolumn downstream separation unit is needed therefore the schema containing several distillation units is likely to be energy intensive. The goal of this work was primarily to assess the technical and commercial feasibility of such separation technology; further process intensification however, is a subject for later studies.


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