Verfahren zur Uebersaettigungsmessung und Vorrichtung zur Durchfuehrung des Verfahrens

EP 1347288 A UPAB: 20031022 NOVELTY - A beam of IR, visible or UV light is introduced into the working zone of a crystallizer, and the occurrence of crystals is detected by measurement of beam scattering. DETAILED DESCRIPTION - Preferred Features: A number of processes can be used, including: the use of a quotient value calculated from measurements of both the primary and scattered beams; correction for crystal movement; differentiation of crystal size by use of different wavelengths; the use of fiber optic conductors; the use of lenses or mirrors to increase the measurement field; or the use of solvent permeable membranes, and pressure control, in the sample zone, to induce variations in concentration and hence crystal formation. USE - Used for the determination of the onset of crystallization within an enclosed sample zone of an industrial crystallizer. ADVANTAGE - The process uses a favorably priced, damage resistant, and effective system