Biphasic phase-transfer catalysis : epoxidation of vegetable oils by surface active ionic liquids in water

Title data

Hegelmann, Markus ; Bohórquez, Wilson F. ; Luibl, Johannes ; Jess, Andreas ; Orjuela, Alvaro ; Cokoja, Mirza:
Biphasic phase-transfer catalysis : epoxidation of vegetable oils by surface active ionic liquids in water.
In: Reaction Chemistry & Engineering. Vol. 9 (2024) . - pp. 2710-2717.
ISSN 2058-9883
DOI: https://doi.org/10.1039/D4RE00215F

Official URL:

Abstract in another language

Vegetable oils (VOs) are an environmentally benign alternative and sustainable carbon feedstock for various industrially relevant compounds, e.g. epoxidized products (EVOs). The commercial production of EVOs is a heterogeneous liquid–liquid reaction with low reaction rates and a limited epoxide selectivity. Furthermore, the separation of the EVOs from the reaction mixture is very intricate, limiting large-scale applicability. In this work, we introduce surface-active imidazolium tungstate ionic liquids (SAILs) as sustainable catalysts for the epoxidation of VOs in water using hydrogen peroxide as a green oxidant. Micelle formation and substrate uptake into the aqueous phase depend on the nature of the cation of the SAIL catalyst, which was studied by dynamic light scattering (DLS), transmission electron microscopy (TEM) and cryo-TEM at various concentrations and temperatures. Recycling studies demonstrate that the catalyst remains in the aqueous phase and can be recovered completely. The absence of the catalyst and additive in the product phase is verified by inductively coupled plasma mass spectrometry (ICP-MS) and 31P-NMR spectroscopy.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Chemical Engineering Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 600 Technology 600 Technology, medicine, applied sciences > 620 Engineering 600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited:	26 Nov 2024 08:05
Last Modified:	26 Nov 2024 08:05
URI:	https://eref.uni-bayreuth.de/id/eprint/91248