Tetrarylmethane ethers
US-10131606-B2 · Nov 20, 2018 · US
Substituted dibenzofurans as fuel markers
US11274258B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11274258-B2 |
| Application number | US-201917044943-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2019 |
| Priority date | Apr 5, 2018 |
| Publication date | Mar 15, 2022 |
| Grant date | Mar 15, 2022 |
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Abstract
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A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel; said method comprising adding to said petroleum hydrocarbon or liquid biologically derived fuel at least one compound that is a R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 —substituted dibenzofuran, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 independently are hydrogen, hydrocarbyl, hydrocarbyloxy, aryl or aryloxy; provided that R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 collectively have at least two carbon atoms; wherein each compound having formula (I) is present at a level from 0.01 ppm to 20 ppm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel; said method comprising adding to said petroleum hydrocarbon or liquid biologically derived fuel at least one compound of formula (I) wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 independently are hydrogen, hydrocarbyl, hydrocarbyloxy, aryl or aryloxy; provided that R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 collectively have at least two carbon atoms; wherein each compound having formula (I) is present at a level from 0.01 ppm to 20 ppm. 2. The method of claim 1 in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 independently are hydrogen, C 1 -C 30 hydrocarbyl, C 1 -C 30 hydrocarbyloxy, C 6 -C 35 aryl or C 6 -C 35 aryloxy. 3. The method of claim 2 in which each compound having formula (I) is present at a level from 0.01 ppm to 10 ppm. 4. The method of claim 3 in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 collectively have at least three carbon atoms. 5. The method of claim 4 in which at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 has at least three carbon atoms.
Assignees
Inventors
Classifications
- C10L1/1855Primary
Cyclic ethers, e.g. epoxides, lactides, lactones · CPC title
Dibenzofurans; Hydrogenated dibenzofurans · CPC title
Tracers which serve to track or identify the fuel component or fuel composition · CPC title
- C10L1/003Primary
Marking, e.g. coloration by addition of pigments · CPC title
Diesel · CPC title
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- What does patent US11274258B2 cover?
- A method for marking a petroleum hydrocarbon or a liquid biologically derived fuel; said method comprising adding to said petroleum hydrocarbon or liquid biologically derived fuel at least one compound that is a R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 —substituted dibenzofuran, wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 independently are hydrogen, hydrocarbyl, hydrocarby…
- Who is the assignee on this patent?
- Dow Global Technologies Llc, Rohm & Haas
- What technology area does this patent fall under?
- Primary CPC classification C10L1/1855. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 15 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 9 related publications on this page (citations in our corpus or others sharing the same primary CPC).