INDICATORS AND METHOD OF MARKING LIQUIDS Russian patent published in 2017 - IPC C10L1/232 C10L1/00 

FIELD: chemistry.

SUBSTANCE: invention discloses a method of marking a liquid hydrocarbon which is selected from diesel fuel, gasoline fuel and solvent, comprising the step of adding to mentioned fluid an indicator compound which is a compound of formula

(I),

wherein each A substituent is independently selected from the group consisting of (i) phenyl group, (ii) a phenyl group substituted by one or more halogen atoms, aliphatic or halogenated aliphatic group, (iii) partially or fully halogenating alkyl group, or (iv) a linear, branched or cyclic C₁-C₂₀ alkyl group, and each group B independently is selected from the group consisting of (i) phenyl group, (ii) an unsubstituted phenylmethyl group, (iii) substituted phenyl or phenylmethyl group in which the benzene ring is substituted by at least one substituent selected from the group consisting of fluorine atoms, a partially or fully halogenated alkyl group and a linear, branched or cyclic C₁-C₂₀ alkyl group, or (iv) a linear, branched or cyclic C₁-C₂₀ alkyl group, wherein the indicator compound is added to hydrocarbon liquids in a concentration of 1 mcg/l to 1000 mcg/l. Also disclosed is a liquid composition comprising a mixture of a hydrocarbon liquid and from 1 mcg/l to 10 mcg/l of indicator compounds of formula (I).

EFFECT: increasing the stability of the indicator to remove hydrocarbon liquids.

13 cl, 2 tbl, 4 ex