Patent ID: 8194245
Filing Date: 2012-06-05
Classification: B01D,G01N

Abstract:
1. A method for measuring the concentrations of species present at least one point of a separation unit functioning in simulated moving bed mode (SMB), using an immersing probe located at one point in the unit or on one of the streams entering or leaving said unit (termed the measuring point), and a thermocouple located in the vicinity of said measuring point, in order to capture the temperature (T spl ), in which method: a) a monochromatic signal is sent through a first fibre optic connected to the immersing probe, originating from a laser source the wavelength of which is 785 nm plus or minus 1 nm; b) a signal corresponding to the Raman effect, termed the Raman signal, is captured through a second fibre optic which is also connected to the immersing probe, and sent to a spectrometer using filters defining a cutoff threshold; c) the Raman spectrum of the signal under consideration is recovered at the spectrometer outlet; d) the Raman spectrum obtained is processed using a mathematical method which accommodates the temperature (T in which: in which expression the integrated intensities P