Continuous gas-phase hydroformylation of but-1-ene in a membrane reactor by supported liquid-phase (SLP) catalysis

Morten Logemann, Jakob Maximilian Marinkovic, Markus Schoerner, Eduardo Jose Garcia-Suarez, Corinna Hecht, Robert Franke, Matthias Wessling, Anders Riisager, Rasmus Fehrmann, Marco Haumann*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Process intensification is a cornerstone to achieve a significant reduction in energy consumption and CO(2)emissions in the chemical industry. In this context, a monolithic membrane reactor combining homogeneous catalytic gas-phase hydroformylation of but-1-ene within situproduct removal is here presented. The homogeneous supported ionic liquid-phase (SILP) catalyst consists of a Rh-biphephos complex dissolved in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C(2)C(1)Im][NTf2] and immobilized on a mesoporous silicon carbide monolith. The resulting monolith is catalytically active and selective towards linear aldehyde formation, but the accumulation of aldehyde products and high boilers in the ionic liquid leads to slow catalyst deactivation. This accumulation is suppressed when bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate is used as alternative solvent, where only marginal aldehyde accumulation and aldol formation occur. A polydimethylsiloxane (PDMS) membrane coating of the monolith increases the aldehyde-alkene ratio by an enrichment factor of 2.2 in the permeate gas compared to the retentate gas from the reactor simplifying further downstream processing. The monolithic membrane reactor loaded with SILP or SLP catalysts presents a scalable, versatile platform to achieve process intensification for diverse hydroformylation reactions as well as related gas-phase reactions.

Original languageEnglish
JournalGreen Chemistry
Volume22
Issue number17
Pages (from-to)5691-5700
ISSN1463-9262
DOIs
Publication statusPublished - 2020

Keywords

  • SILP CATALYSIS
  • PERMEATION
  • SEPARATION
  • PERFORMANCE
  • TRANSPORT
  • PURE

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