Claims
- 1. A chemical composition comprising an emulsified admixture of:
from about 10 to about 70 weight percent water; from about 1 to about 60 weight percent acid blend, the acid blend including at least one mineral acid and at least one organic acid; from about 1 to about 40 weight percent surfactant, the surfactant comprising a blend of a nonionic surfactant and an anionic surfactant; and from about 0.5 to about 40 weight percent solvent.
- 2. The composition according to claim 1, further comprising from about 1 to about 25 weight percent co-solvent.
- 3. The composition according to claim 1, further comprising from about 0.05 to about 1.0 weight percent oxidizer.
- 4. The composition according to claim 1, in which the surfactant comprises about 1 to about 25 weight percent nonionic surfactant and about 1 to about 25 weight percent anionic surfactant.
- 5. The composition according to claim 1, in which the acid blend comprises from about 8 to about 16 weight percent of said composition.
- 6. The composition according to claim 1, in which the anionic surfactant comprises from about 12 to about 16 weight percent of said composition.
- 7. The composition according to claim 1, in which the nonionic surfactant comprises from about 2 to about 6 weight percent of said composition.
- 8. The composition according to claim 1, in which the solvent comprises from about 5 to about 10 weight percent of said composition.
- 9. The composition according to claim 2, in which the co-solvent comprises from about 3 to about 16 weight percent of said composition.
- 10. The composition according to claim 1, further comprising a cationic surfactant.
- 11. A chemical composition comprising an emulsified admixture of:
from about 10 to about 70 weight percent water; from about 1 to about 60 weight percent acid blend, the acid blend including at least one mineral acid and at least one organic acid; from about 1 to about 25 weight percent nonionic surfactant; from about 1 to about 25 weight percent anionic surfactant; from about 0.5 to about 40 weight percent solvent; and from about 1 to about 25 weight percent co-solvent.
- 12. The composition according to claim 11, further comprising from about 0.05 to about 1.0 weight percent oxidizer.
- 13. The composition according to claim 11, in which the acid blend comprises from about 8 to about 16 weight percent of said composition.
- 14. The composition according to claim 11, in which the anionic surfactant comprises from about 12 to about 16 weight percent of said composition.
- 15. The composition according to claim 11, in which the nonionic surfactant comprises from about 2 to about 6 weight percent of said composition.
- 16. The composition according to claim 11, in which the solvent comprises from about 5 to about 10 weight percent of said composition.
- 17. The composition according to claim 11, in which the co-solvent comprises from about 3 to about 16 weight percent of said composition.
- 18. The composition according to claim 12, in which the oxidizer is selected from the group consisting of potassium permanganate, sodium permanganate, calcium permanganate and peroxide.
- 19. The composition according to claim 11, further comprising a cationic surfactant.
- 20. A method for preparing a micro-emulsified well cleaning composition, the method comprising:
admixing, with continuous mixing, from about 10 to about 70 weight percent water, from about 1 to about 60 weight percent acid blend including at least one mineral acid and at least one organic acid, from about 1 to about 25 weight percent nonionic surfactant, from about 1 to about 25 weight percent anionic surfactant, and from about 1 to about 25 weight percent co-solvent to provide a first intermediate mixture; and adding to said first intermediate mixture, with continuous mixing, from about 0.5 to about 40 weight percent solvent and from about 0.05 to about 1 weight percent oxidizer, based on the final weight of said emulsion, and continuing mixing until said composition comprises a micro-emulsion.
RELATED APPLICATIONS
[0001] This application is a continuation of co-pending U.S. patent application Ser. No. 09/459,213 filed Dec. 10, 1999, issued Jul. 15, 2003 as U.S. Pat. No. 6,593,279.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09459213 |
Dec 1999 |
US |
Child |
10612426 |
Jul 2003 |
US |