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US 6,514,917 B1Granted
Molecular tags for organic solvent systems
AssigneeUnited Color Manufacturing, Inc.
InventorsMichael J. Smith, Bharat Desai, Justin J. Frederico
Life of this patent
Estimating the term…
Abstract
Colorless markers for petroleum products and methods and composition for detecting them.
Claims34
A composition comprising:
- a) a petroleum product which forms an organic phase;
- b) a marker substance dissolved in said petroleum product;
- and
- c) a non-aqueous acid combined with said marker substance in said organic phase to develop a detectable color.
1 more element
A composition comprising:
- a) a petroleum product which forms an organic phase;
- b) a marker substance dissolved in said petroleum product;
- and
- c) an acid having a pKa value not more than 3.5 combined with said marker substance in said organic phase to develop a detectable color.
1 more element
A composition comprising:
- a) a petroleum product which forms an organic phase;
- b) a marker substance dissolved in said petroleum product;
- and
- c) an organic acid combined with said marker substance and petroleum product to develop a detectable color or fluorescence in said organic phase.
1 more element
A marker for petroleum products of the following structure:
- wherein A, B, and C, independently of each other, are aromatic carbocyclic moeities, N is nitrogen and R is an alkyl group or hydrogen atom.
A method of identifying a petroleum product containing an acid reactable marker comprising:
- a) obtaining a sample of petroleum product containing an acid reactable marker;
- b) adding to said sample a developing agent comprising a non-aqueous acid or solution to form a single phase in which said acid and marker combine to develop a detectable color
- c) detecting said color.
Dependencies are inferred from the claim text.