Tetrarylmethane ethers as fuel markers
US9926506B2 · kind B2 · utility
3Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Apr 21, 2015 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Apr 21, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2230/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel by adding to the petroleum hydrocarbon or liquid biologically derived fuel a compound having formula C{Ph(R1)i(OR2)j}2{Ph(R3)m(OR4)n}{Ph(R5)o(OR6)p}, wherein Ph represents a benzene ring, R1, R3 and R5 independently are C1-C18 alkyl or C4-C18 heteroalkyl; R2, R4 and R6 independently are C1-C18 alkyl or C4-C18 heteroalkyl, i, j, m, n, o and p independently are zero, one or two. Each compound having formula C{Ph(R1)i(OR2)j}2{Ph(R3)m(OR4)n}{Ph(R5)o(OR6)p} is present at a level from 0.01 ppm to 20 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.