Process for separating volatile substances from solid or liquid materials, in which the material which has to release the volatile substance is placed in contact, operating pressures of greater than 1 to 30 bars, with a dry or humid gas stream which may be introduced in the circuit....http://www.google.com.au/patents/US5113597?utm_source=gb-gplus-sharePatent US5113597 - Process for drying of plant or animal material
