The recent interest in using superheated water as a replacement for more polluting organic solvents began about 15 years ago and Tony Clifford and his colleagues, initially at the University of Leeds, and an institution in the USA were the first to study this. This gave rise to a patent (S. B. Hawthorne, D. J. Miller, A. J. M. Lagadec, P. J. Hammond, A. A. Clifford, “Method of manipulating the chemical properties of water to improve the effectiveness of a desired process”, US Patent 6352644, 2002). We have continued this research and developed processes using superheated water, which has given us a very useful background in knowing how it behaves in processes. Our customers tell us that we are unique position in superheated water technology.