Claims
- 1. An azo dye having a high solubility in petroleum fuels and having the formula ##STR20## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each H or CH.sub.3 and R.sub.5 is either 2-ethylhexyl or 2-ethylhexyloxypropyl, wherein:
- A. when R.sub.5 is 2-ethylhexyl, then at least one of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3 ;
- B. when R.sub.5 is 2-ethylhexyloxypropyl, then each of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is either, H or CH.sub.3 provided that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time when R.sub.2 and R.sub.4 are both H, or R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time when R.sub.1 and R.sub.3 are both H.
- 2. An azo dye of claim 1 wherein R.sub.1 or R.sub.2 is CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 3. An azo dye of claim 1 wherein R.sub.3 or R.sub.4 is CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 4. An azo dye of claim 1 wherein R.sub.1 and R.sub.2 are each CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 5. An azo dye of claim 1 wherein R.sub.3 and R.sub.4 are each CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 6. An azo dye of claim 1 wherein R.sub.1 and R.sub.3 are each CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 7. An azo dye of claim 1 wherein R.sub.2 and R.sub.4 are each CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 8. An azo dye of claim 1 wherein R.sub.1, R.sub.3 and R.sub.4 are each CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 9. An azo dye of claim 1 wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each CH.sub.3 and R.sub.5 is 2-ethylhexyl.
- 10. An azo dye having a high solubility in petroleum fuels and having the formula ##STR21## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each H or C.sub.3 with the proviso that at least one of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3.
- 11. The azo dye of claim 10 wherein R.sub.1 is CH.sub.3.
- 12. The azo dye of claim 10 wherein R.sub.2 is CH.sub.3.
- 13. The azo dye of claim 10 wherein R.sub.3 is CH.sub.3.
- 14. The azo dye of claim 10 wherein R.sub.4 is CH.sub.3.
- 15. An azo dye having a high solubility in petroleum fuels and having the formula ##STR22## in which each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H or CH.sub.3, with the proviso that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time when R.sub.2 and R.sub.4 are both H, and R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time when R.sub.1 and R.sub.3 are both H.
- 16. The azo dye of claim 15 wherein each of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H.
- 17. The azo dye of claim 15 wherein each of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3.
- 18. A colored petroleum fuel having dissolved therein an azo dye composition having the general formula ##STR23## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each H or CH.sub.3 with the proviso that at least one of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3.
- 19. A colored petroleum fuel having dissolved therein an azo dye composition having the formula ##STR24## in which each of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H or CH.sub.3, with the proviso that R.sub.1 and R.sub.3 are not both CH.sub.3 at the same time when R.sub.2 and R.sub.4 are both H, and R.sub.2 and R.sub.4 are not both CH.sub.3 at the same time when R.sub.1 and R.sub.3 are both H.
- 20. The colored petroleum fuel of claim 19 wherein each of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is H.
- 21. The colored petroleum distillate of claim 19 wherein each of said R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is CH.sub.3.
Parent Case Info
This application is a continuation-in-part of Ser. No. 601,015, filed Aug. 1, 1975, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3096140 |
Gaetani |
Jul 1963 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
601015 |
Aug 1975 |
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