Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Question on minimization of start-up time of the extraction column N.F. GAKHRAMANOV, N.S. MAMEDOV, T.D. KULIEV The presented article has been dedicated to the problem of fixed hydrodynamic regime during a little time. The Different aspects of unfixed regimes (putting in operation) have been investigated. Key words: extraction, consumption of raw material, spesific load, sieved plates, column extractor, time minimization of process out put, system nonlinearity equation.