Colored petroleum markers
AssigneeMorton Thiokol, Inc.
InventorRichard B. Orelup
Life of this patent
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Abstract
Tagging compounds (which function as both dyes and markers) having the following structures: ##STR1## wherein x is an integer between 0 and 3 inclusive, y is an integer between 1 and 3 inclusive, z is 0 or 1, and R is a straight or branched chain hydrocarbon are disclosed. These compounds can be dissolved in a diluent at a concentration of from about 10 percent to about 30 percent, forming a concentrate which can be further dispersed in an organic liquid to form a final concentration of from about 1 ppm to about 15 ppm of said tagging compound in said liquid. Methods for detecting the presence of a tagged compound in an organic liquid are also disclosed.
Claims9
A method for marking water-immiscible fuel so the presence of the marker can be verified, comprising the steps of:
- A. providing a water-immiscible fuel to be marked;
- B. providing a marker having the structure:
- ##STR5## where x is an integer between 0 and 3 inclusive, y is an integer between 1 and 3 inclusive, and z is 0 or 1;
- and
- C. stably dispersing from about 1 ppm to about 15 ppm of said marker in said fuel.
Dependencies are inferred from the claim text.