Stephen Tallon

Stephen Tallon

Team Leader, Principal Chemical Engineer


Supercritical fluid processing for natural products

I'm the Team Leader and Principal Chemical Engineer in the Process Engineering team at Callaghan Innovation. My expertise lies in the field of Biotechnologies, specifically focusing on Industrial processing of natural products, solvent extraction, and supercritical fluid processing.

As a seasoned professional with over 25 years of experience, I have been inspired by the many leaders in my field who have paved the way for groundbreaking advancements. I take immense pride in leading an engineering team that provides essential product development, scale-up, and pilot processing services. There is enormous potential for our industrial processing technologies to revolutionise industries and contribute to New Zealand’s sustainable future. 

Part of my work uses supercritical fluid processing to enable us to extract, convert, and separate natural products efficiently. The team is well known for this cutting-edge technology and I'm excited to be at the forefront of its application.

Areas of expertise
  • Industrial processing of natural products
  • Solvent extraction
  • Supercritical fluid processing
  • PhD Chemical Engineering, University of Auckland, 2001
Memberships and awards
  • Member AIChE
Selected publications
  • Tallon S, Moreno T 2015. Liquid–Liquid Extraction, chapter 20, in Chemical Processes for a sustainable future, edited by Trevor Letcher, Janet Scott, Darrell Alec Patterson, Pub. Royal Society of Chemistry.
  • Moreno, T., Montanes, F., Tallon, S.J., Fenton, T., King, J.W. Extraction of cannabinoids from hemp (Cannabis sativa L.) using high pressure solvents: An overview of different processing options, 2020, Journal of Supercritical Fluids, 161
  • Tallon, S., Davies, C.E., System and method for determining particle size in particulate solids, WO/2002/039091, 05/16/2002.
  • S Tallon, O Catchpole, Supercritical fluid processing of organic compounds, Chemistry in New Zealand, New Zealand Institute of Chemistry, invited article, October 2008
  • Tallon, S., Davies, C.E., Kirkegaard, M., (2003), “An acoustic method for in-line particle size measurement in flowing bulk solids”, Journal of Process mechanical engineering, ImechE, Vol 217, Part E, pp 33-39
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