Auto-Tandem Catalytic Reductive Hydroformylation in a CO<sub>2</sub>-Switchable Solvent System
Sebastian Püschel, Jan Sadowski, Thorsten Rösler, Kira R. Ehmann, Andreas J. Vorholt, Walter Leitner
Abstract
Upgradation of olefin-enriched Fischer–Tropsch cuts by the synthesis of alcohols leads to drop-in-capable biosynthetic fuels with low carbon emissions. As an alternative to the conventional two-step production of long-chain alcohols, tandem catalytic systems improve the energy and resource efficiency. Herein, we present an auto-tandem catalytic system for the production of alcohols from olefin–paraffin mixtures. By utilization of a tertiary alkanolamine as the ligand as well as the switchable component in the solvent system, a lean reaction system capable of catalyst recycling was developed. The system was characterized with regard to the switchable solvent separation approach and reaction parameters, resulting in alcohol yields of up to 99.5% and turnover frequencies of up to 764 h–1. By recycling the catalyst in 10 consecutive reactions, a total turnover number of 2810 was achieved.