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Enhanced hydroformylation of 1-octene in n-butane expanded solvents with Co-based complexes

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Abstract

The use of n-butane expanded liquids (BXLs) as reaction media to enhance Co-catalyzed hydroformylation of 1-octene has been successfully demonstrated. Both 1-octene as well as typical hydroformylation mixtures are volumetrically expanded by n-butane at typical hydroformylation conditions (∼50% expansion at 1.8 MPa of n-butane and 180 °C). By replacing up to 20% of the traditional solvent (toluene) in the reaction mixture with compressed n-butane, the TOF for Co-catalyzed 1-octene hydroformylation with triphenylphosphine ligand was enhanced by approximately 20% in the BXL system. The higher TOF in BXLs is attributed to the improved syngas availability in the pressure-tunable BXL phase compared to the traditional liquid phase. The main impediment to TOF enhancement is catalyst precipitation beyond a certain level of n-butane dissolution in the liquid phase. Hence, catalyst complexes that show improved solubility in the BXL phase are desirable to better harness the potential benefits offered by gas-expanded liquids.

Graphical abstract: Enhanced hydroformylation of 1-octene in n-butane expanded solvents with Co-based complexes

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Publication details

The article was received on 28 Feb 2018, accepted on 03 Apr 2018 and first published on 04 Apr 2018


Article type: Paper
DOI: 10.1039/C8RE00034D
Citation: React. Chem. Eng., 2018, Advance Article
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    Enhanced hydroformylation of 1-octene in n-butane expanded solvents with Co-based complexes

    D. Liu, Z. Xie, W. K. Snavely, R. Chaudhari and B. Subramaniam, React. Chem. Eng., 2018, Advance Article , DOI: 10.1039/C8RE00034D

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