Dr. Astrid Ina Rest

New sustainable processes towards biopolymers based on renewable resources are in focus of current developments in times of a global resource change. Especially oleochemicals from natural fats and oils are promising for the synthesis of biopolymers due to their characteristic structural properties. By means of homogeneous transition metal catalysis oleochemicals can be efficiently transferred to polymer pre-stages.

With regard to an ecological and economical application a downstream separation of product and catalyst is essential - on the one hand, to obtain the required product purity and on the other hand, to enable a recycling of the usually expensive precious metal catalysts. However, this separation is challenging and with established methods (e.g. distillation, extraction, nano-filtration) the desired separation efficiency is not achieved. Thus, in this work the potential of cooling crystallization for selective product separation is investigated and the suitability of this concept as a new catalyst recycling tool in homogeneous transition metal catalysis is verified.

Paper

• Astrid Ina Seifert, Hannes Wegener, Katharina Brühl, Thomas Seidensticker, Kerstin Wohlgemuth
  Polymer-Grade Bio-Monomers from Oleochemicals by Combining Homogeneous Catalysis and Selective Product Crystallization in an Integrated Process
  Processes 2023, 11 (10), 2861, doi.org/10.3390/pr11102861
   
• Astrid Ina Seifert, Anna Wehning, Jan Gutsch, Kerstin Wohlgemuth
  Focusing impurities during inert gassing crystallization of complex mixtures
  Organic Process Research & Development, 2023, 27 (8), 1485-1498, doi.org/10.1021/acs.oprd.3c00171
   
• Astrid Ina Seifert, Justin Simons, Jan Gutsch, Kerstin Wohlgemuth
  Inert gassing crystallization for improved product separation of oleo-chemicals towards an efficient circular economy
  Organic Process Research & Development (12/2022), doi.org/10.1021/acs.oprd.2c00312
   
• Johanna Vondran, Astrid Ina Seifert, Kevin Schäfer, André Laudanski, Tabea Deysenroth, Kerstin Wohlgemuth, Thomas Seidensticker
  Progressing the Crystal Way to Sustainability: Strategy for Developing an Integrated Recycling Process of Homogeneous Catalysts by Selective Product Crystallization
  Industrial & Engineering Chemistry Researc, 2022, 61 (27), 9621-9631, doi.org/10.1021/acs.iecr.2c00476
   
• Claas Steenweg, Astrid Ina Seifert, Gerhard Schembecker, Kerstin Wohlgemuth
  Characterization of a Modular Continuous Vacuum Screw Filter for Small-Scale Solid-Liquid Separation of Suspensions
  Org. Process Res. Dev. 2021, 25, 4, 926–940, doi.org/10.1021/acs.oprd.0c00550
   
• Claas Steenweg, Astrid Ina Seifert, Nils Böttger, Kerstin Wohlgemuth
  Process Intensification enabling Continuous Manufacturing Processes using Modular Continuous Vacuum Screw Filter
  Org. Process Res. Dev. 2021, 25 (11), 2525-2536, doi.org/10.1021/acs.oprd.1c00294

Poster presentations

• A. Seifert, J. Vondran, T. Seidensticker, K. Wohlgemuth
  Functionalization of oleo chemicals: Developing sustainable processes by integrated catalyst recycling
  11th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, Dortmund (2022)
   
• A. Seifert, J. Simons, K. Wohlgemuth
  Inert Gassing Crystallization for Selective Product Separation in an Integrated Catalyst Recycling Process
  Jahrestreffen der ProcessNet-Fachgruppe Kristallisation, Dortmund (2022)
   
• A. Seifert, A. Laudanski, J. Simons, T. Seidensticker, K. Wohlgemuth
  Towards product separation by cooling crystallization as part of an integrated catalyst recycling process
  21st ISIC - International Symposium on Industrial Crystallization, Virtual Meeting (2021)
   
• A. Seifert, A. Laudanski, K. Wohlgemuth
  Selective in situ product separation by cooling crystallization as a new recycling tool for homogeneous catalysts
  Jahrestreffen der ProcessNet-Fachgruppe Kristallisation, Virtual Meeting (2021)