G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/28 (2006.01) G01N 13/00 (2006.01) G01N 25/14 (2006.01) G01N 30/00 (2006.01) G01N 30/90 (2006.01)
Patent
CA 2213983
A test apparatus for use in determining the concentration of oils or other soluble contaminants in a petroleum hydrocarbon solvent. The apparatus includes a positioner for a two-layer fibrous sheet, or two separate sheets, in either case providing an upper layer of material that is sorptive to polar materials and a lower layer that is absorptive to non-polar hydrocarbon liquids. When the contaminated liquid evaporates either, as by being heated, a characteristic stain indicative of contaminant level remains on the lower layer. The method includes applying contaminated solvent, separating particulates in the upper fibrous level, and allowing the soluble materials to stain the lower layer. Some embodiments of the apparatus include built-in heating and air circulation means.
Appareil pour déterminer la concentration d'huiles ou d'autres contaminants solubles présents dans un solvant d'hydrocarbures de pétrole. L'appareil comporte un positionneur pour une feuille fibreuse à deux couches, ou deux feuilles séparées, avec dans chaque cas une couche supérieure de matière adsorbant les substances polaires et une couche inférieure adsorbant les liquides constitués d'hydrocarbures non polaires. Lorsque le liquide contaminé s'évapore, comme par chauffage, une tache caractéristique indicatrice du niveau de contamination, demeure sur la couche inférieure. La méthode consiste à appliquer un solvant contaminé, à séparer les particules dans la partie fibreuse supérieure et à laisser les matières solubles colorer la couche inférieure. Certaines versions de l'appareil comprennent un système de chauffage incorporé et un dispositif de circulation.
Osler Hoskin & Harcourt Llp
Safety Kleen Systems Inc.
Safety-Kleen Corp.
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