Claims
- 1. A method of controlling fouling during the processing of a hydrocarbon having a bromine number greater than 10 and containing substituents which are induced by oxygen to react to form fouling materials, which comprises adding to the petroleum or petrochemical being processed a sufficient amount for the purpose of an antioxidant composition comprising (a) an unhindered or partially hindered phenol which possesses the following formula: ##STR2## wherein R and R.sub.1 are selected from the group consisting of hydrogen and carbon groupings, with the proviso that not more than one of R and R.sub.1 be a secondary or tertiary carbon grouping and R.sub.2 is alkyl, alkoxy or an amine group; and (b) at least one oil soluble strongly basic amine compound selected from the group consisting of aminoethylpiperazine and cyclohexylamine.
- 2. A method according to claim 1 wherein the composition is added to said system in an amount of from 0.1 to 2000 ppm of the petroleum or petrochemical being processed.
- 3. A method according to claim 2 wherein the phenol is selected from the group consisting of butylated hydroxyanisole, p-cresol, p-methoxyphenol, p-aminophenol, and.
- 4. A method according to claim 3 wherein the amine is N-(2-aminoethyl)piperazine.
- 5. A method according to claim 4 wherein the composition is in an organic solvent.
- 6. A method according to claim 1 wherein the phenol and the amine are present in a weight ratio of 2 to 98 to 98 to 2.
- 7. A method according to claim 6 wherein the composition comprises a weight ratio of amine to phenol of 1.5.
- 8. A method according to claim 7 wherein the composition is further contained in an organic solvent.
- 9. A method according to claim 8 wherein the solvent is a heavy aromatic naphtha, dimethylformamide or mixtures thereof.
- 10. A method according to claim 2 wherein the hydrocarbon being processed is selected from the group of pyrolysis gasoline or isoprene.
- 11. A method according to claim 10 wherein the phenol is selected from the group of butylated hydroxyanisole, methoxybenzylidene aminophenol and methoxyphenol and said amine is aminoethylpiperazine or cyclohexylamine.
- 12. A method according to claim 11 wherein the phenol and the amine are present in a weight ratio of 2:98 to 98:2.
- 13. A method according to claim 3 wherein the amine is cyclohexylamine.
- 14. A method according to claim 24 wherein the amine and phenol are present in said composition in a ratio by weight of 98:2 to 2:98 and said composition is contained in an organic medium.
- 15. A composition for use as an antioxidant in petroleum or petrochemical processing systems comprising
- (a) an unhindered or partially hindered phenol possessing the formula ##STR3## wherein R and R.sub.1 are selected from the group consisting of hydrogen and a carbon containing group, with the proviso that not more than one of R or R.sub.1 be a secondary or tertiary carbon grouping and R.sub.2 is alkyl, alkoxy or an amino group; and
- (b) at least one strongly basic amine compound selected from the group consisting of aminoethylpiperazine and cyclohexylamine.
- 16. A composition according to claim 15 wherein the composition is contained in an organic medium.
- 17. A composition according to claim 16 wherein the amine is in sufficient amount to assure the solubility of said phenol in said medium.
- 18. A composition according to claim 15 or 12 where the amine and phenol are present in said composition in a percentage by weight of 98:2 to 2:98.
- 19. A composition according to claim 18 wherein the ratio by weight of amine to phenol is 1.5.
- 20. A composition according to claim 15 wherein said phenol is selected from the group consisting of butylated hydroxyanisole, p-cresol, p-methoxyphenol, p-aminophenol, and.
- 21. A composition according to claim 20 wherein the amine is N-(2-aminoethyl)piperazine).
- 22. A composition according to claim 21 wherein the amine and phenol are present in said composition in a weight ratio of 98:2 to 2:98.
- 23. A composition according to claim 22 which is contained in an organic solvent for such.
- 24. A composition according to claim 23 wherein said solvent is a heavy aromatic naphtha, dimethylformamide or mixtures thereof.
- 25. A composition according to claim 23 wherein the amine and phenol are present in a weight ratio of 1.5.
- 26. A composition according to claim 20 wherein the amine is cyclohexylamine.
- 27. A composition according to claim 26 wherein the amine and phenol are present in said composition in a ratio by weight of 98:2 to 2:98 and said composition is contained in an organic medium.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 678,448, filed Dec. 5, 1984, now abandoned.
US Referenced Citations (20)
Non-Patent Literature Citations (1)
Entry |
Lundberg, W. O. (Ed.),Autoxidation and Antioxidants, vol. II, Interscience Publishers, N.Y. (1962) pp. 701-730. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
678448 |
Dec 1984 |
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