Issue 10, 2021

Improvement of n-butanol Guerbet condensation: a reaction integration of n-butanol Guerbet condensation and 1,1-dibutoxybutane hydrolysis

Abstract

n-Butanol Guerbet condensation is a green route to 2-ethylhexanol (2EHO). The by-product water not only hinders the reaction progress and reduces the selectivity to 2EHO, but also causes catalyst deactivation. Therefore, simultaneous consumption of water is an effective way to improve n-butanol Guerbet condensation reaction performance. For this purpose, herein, 1,1-dibutoxybutane hydrolysis was incorporated to eliminate the adverse effect of water. Firstly, n-butanol Guerbet condensation and the reaction integration of n-butanol Guerbet condensation with 1,1-dibutoxybutane hydrolysis were thermodynamically analyzed. The results showed that the reaction integration is beneficial to the progress of n-butanol Guerbet condensation and the formation of 2EHO. Then, the appropriate reaction conditions for the reaction integration were determined by a single-factor experiment; the selectivity to 2EHO reached 73.3% at an n-butanol conversion of 70.5%. Finally, through the kinetic analysis of the two reaction systems, it is confirmed that the 1,1-dibutoxybutane hydrolysis reaction can reduce the activation energy of both the n-butanol dehydrogenation step and n-butanal aldol condensation step, effectively promoting the n-butanol Guerbet condensation reaction.

Graphical abstract: Improvement of n-butanol Guerbet condensation: a reaction integration of n-butanol Guerbet condensation and 1,1-dibutoxybutane hydrolysis

Supplementary files

Article information

Article type
Paper
Submitted
29 May 2021
Accepted
02 Jul 2021
First published
04 Jul 2021

React. Chem. Eng., 2021,6, 1845-1853

Improvement of n-butanol Guerbet condensation: a reaction integration of n-butanol Guerbet condensation and 1,1-dibutoxybutane hydrolysis

X. Han, S. Li, H. An, X. Zhao and Y. Wang, React. Chem. Eng., 2021, 6, 1845 DOI: 10.1039/D1RE00206F

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