At Critical Processes we specializes in clean separation processes to manufacture valuable products from various biomasses. The clean methods use solvents such as water, carbon dioxide and ethanol and therefore do not pollute the environment or leave undesirable solvent residues in the products. These are used in the pharmaceutical, nutraceutical, food-supplement and cosmetic industries.
Our manufacturing operations involve working on plant materials to obtain valuable products by extraction and separation. Clean methods are used such as water, superheated water and ethanol extraction and column separation using water, ethanol and ethyl acetate.
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
We carry out research for other larger companies into possible clean processes, who are looking for new products or cleaner production of old products. We have facilities for carrying out work with supercritical fluids, superheated water, column chromatography and analytical facilities for investigating the products.
OUR UNIQUE KNOWLEDGE
Our background knowledge was originally acquired from working in a research group in the University of Leeds in the area of clean technology. Since 1984 some 50 PhD students and 30 research assistants and post-doctoral fellows worked in the group. The main fields of study were supercritical fluids and superheated water. We were prominent in supercritical fluids and the first to study
EQUIPMENT DESIGN & ASSEMBLY
When contract research leads to a process that a company then wishes to do its own manufacture, or continue its own research, we make equipment for them. Below you see a piece of equipment for studying the absorption of carbon dioxide by cement and below that processing equipment for purifying PEG with superheated water.