G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/28 (2006.01) C09B 29/12 (2006.01) C09B 29/26 (2006.01) C09B 31/062 (2006.01) C10L 1/00 (2006.01) C10L 1/22 (2006.01) C10L 1/226 (2006.01) C10M 171/00 (2006.01) G01N 21/78 (2006.01)
Patent
CA 2172959
A process for detecting marked mineral oils by treating the marked mineral oil with an extracting agent containing water, a solvent and a base, in which use is made as the marking agent of an azo dye of formula (I), in which ring A may be benzo-anellated and l is 1 or 2, m is 1 to 4, X1 is hydrogen, C1-C4-alkyl, cyano, nitro or possibly substituted phenylazo; X2 is hydrogen, C1-C4-alkyl, cyano, nitro, C1-C4-alkoxy or C1-C16-alkoxy carbonyl; X3 is hydrogen, C1-C4- alkyl, cyano or C1-C16-alkoxy carbonyl and X4 is hydrogen, hydroxy, possibly substituted C1-C8-alkyl, C1-C4-alkoxy, amino, C1-C4-dialkyl amino or possibly substituted C1-C16-monoalkylamino. A partially or completely water-miscible organic solvent is used as the solvent and the base is an alkaline or alkaline earth hydroxide, an alkali carbonate or a quaternary ammonium hydroxide. The invention also relates to the use of azo dyes as marking agents for mineral oils and novel azo dyes.
L'invention concerne un procédé de détection d'huiles minérales marquées, procédé selon lequel l'huile minérale marquée est traitée avec un agent d'extraction contenant de l'eau, un solvant et une base. On utilise comme agent de marquage un colorant azoïque de la formule (I), dans laquelle le noyau A peut être benzo-annelé et l vaut 1 ou 2; m est compris entre 1 et 4; X?1¿ représente hydrogène, alkyle C¿1-4?, cyano, nitro ou phénylazo éventuellement substitué; X?2¿ représente hydrogène, alkyle C¿1?-C¿4?, cyano, nitro, alcoxy C¿1?-C¿4? ou alcoxycarbonyl C¿1?-C¿16?; X?3¿ représente hydrogène, alkyle C¿1?-C¿4?, cyano ou alcoxycarbonyle C¿1?-C¿16?, et X?4¿ représente hydrogène, hydroxy, alkyle C¿1?-C¿8? éventuellement substitué, alcoxy C¿1?-C¿4?, amino, dialkylamino C¿1?-C¿4? ou monoalkylamino C¿1?-C¿16? éventuellement substitué. On utilise, comme solvant, un solvant organique partiellement ou complètement miscible avec l'eau, et, comme base, un hydroxyde alcalin ou alcalino terreux, un carbonate alcalin ou un hydroxyde d'ammonium quaternaire. L'invention concerne également l'utilisation de colorants azoïques comme agents de marquage pour huiles minérales, ainsi que de nouveaux colorants azoïques.
Beck Karin Heidrun
Dyllick-Brenzinger Rainer
Raulfs Friedrich-Wilhelm
Schlosser Ulrike
Scholz Gerhard
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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