Biphenyl Marker Compounds for Fuel Digital Identification
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Solution Overview
Problem
There is a need for additional chemical markers for liquid hydrocarbons and other fuels and oils to maximize the available codes in digital marking systems, as existing markers are limited in variety and functionality.
Innovation Solution
A compound with the formula (I) is introduced, where G represents C1-C12 alkyl or C1-C12 alkoxy substituents on a biphenyl moiety, which is added to petroleum hydrocarbons, biodiesel fuel, or ethanol fuel to create a digital marking system, allowing for the incorporation of coded information through the use of multiple marker compounds detectable by chromatographic techniques and mass spectral analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing marker compounds are used for marking liquid hydrocarbons and fuels, then the marking function is achieved, but the variety of available codes is limited
Solution Approach 1:
The patent applies parameter changes by systematically varying the substituent groups (G1, G2, G3, G4) on the biphenyl core structure. Each substituent can be independently selected from multiple chemical groups (alkyl, alkoxy, halogen, etc.), creating a combinatorial library of marker compounds with diverse molecular weights, retention times, and spectral characteristics. This enables expansion of the available code variety without requiring a fundamentally different marking approach
Solution Approach 2:
The patent employs composite marker compounds consisting of a biphenyl core structure combined with various substituent groups. This composite approach allows the markers to exhibit unique chromatographic and spectral properties that can be detected and differentiated. The combination of the rigid biphenyl scaffold with flexible substituent variations creates a family of compounds suitable for digital marking systems
2Reliability
If marker compounds are added to fuels, then identification capability is enabled, but detectability and stability must be maintained under harsh conditions
Solution Approach 1:
The marker compounds are designed to be chemically stable yet detectable at very low concentrations (ppm to ppb levels). The biphenyl core structure provides inherent stability against degradation in fuel environments, while the substituent groups can be optimized for detectability. This allows the markers to function reliably as trace additives without being consumed or degraded by harsh fuel conditions
Solution Approach 2:
The patent applies local quality by strategically placing different substituent groups at specific positions (G1, G2, G3, G4) on the biphenyl molecule. Each position can be independently optimized for specific properties: some positions favor stability, others enhance detectability through unique mass spectral fragments or chromatographic behavior. This localized optimization allows the marker to simultaneously withstand harsh conditions while maintaining detectability
Data Source
AI summary
A compound having formula (I)wherein G represents at least one substituent selected from the group consisting of C1-C12 alkyl and C1-C12 alkoxy.