G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/49 (2006.01) B01J 13/00 (2006.01) G01N 1/38 (2006.01) G01N 15/00 (2006.01) G01N 35/00 (2006.01)
Patent
CA 2567452
A device is developed that is capable of automatically and continuously extracting fluid from a polymer-containing vessel and mixing this with a solvent such that the final fluid is dilute enough that single particle light scattering, spectrophotometric and other measurements can be made on it. Whereas many sampling and dilution devices exist, the novelty of this invention consists in its ability to deal with very high viscosities, including those laden with bubbles, and to introduce only a short delay time between sampling and measurement. The device is ideally suited for situations where the viscosity of the polymer-containing vessel changes over a wide range during the course of a reaction; e.g. polymerization, polymer degradation, aggregation, and others. Furthermore, provision is made for modular conditioning stages, such as changing solvent conditions, evaporating monomer, filtering, etc. The amount of sample actually withdrawn for measurement is very low, normally on the order of 0.25ml to 5ml per hour. The device can also vary the dilution factor either automatically or manually during operation.
L'invention porte sur un dispositif d'extraction automatique et continuelle de fluide d'un récipient contenant un polymère et de mélange dudit fluide à un solvant de manière à ce que le fluide final soit suffisament dilué pour effectuer des mesures telles que la diffusion de la lumière des particules isolées, la spectrophotométrie ou autres. Face aux nombreux dispositifs d'échantillonnage et de dilution existants, la nouveauté de l'invention consiste en sa capacité de traiter des viscosités très élevées dont celles chargées de bulles, et à raccourcir le temps séparant l'échantillonnage de la mesure. De plus, le dispositif s'adapte idéalement à des situations où la viscosité à l'intérieur du récipient varie pendant une réaction (polymérisation, dégradation du polymère, agrégation et autres). Il s'adapte en outre, aux étapes modulaires de conditionnement, telles les modifications d'état des solvants, l'évaporation des monomères, le filtrage, etc. la quantité d'échantillon extraite est très faible, de l'ordre de 0,25 ml à 5 ml à l'heure. Il est également possible de faire varier le facteur de dilution, soit automatiquement, soit manuellement, en cours d'opération.
Norton Rose Or S.e.n.c.r.l.,s.r.l./llp
The Administrators Of The Tulane Educational Fund
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