Claims
- 1. A composition for inhibiting the formation and deposition of coke on the heated metal surfaces in contact with a hydrocarbon feedstock which is undergoing pyrolytic processing to produce lower hydrocarbon fractions and said metal surfaces having a temperature of about 1600.degree. F. or higher, which improvement comprises a synergistic combination of a boron compound and dihydroxybenzene compound selected from the group consisting of hydroquinone, resorcinol, catechol, and 4-tert-butyl resorcinol.
- 2. A composition as claimed in claim 1 wherein said boron compound is an ammonium borate.
- 3. A composition as claimed in claim 2 wherein said ammonium borate is ammonium biborate.
- 4. A composition as claimed in claim 2 wherein said ammonium borate is ammonium pentaborate.
- 5. A composition as claimed in claim 1 wherein said boron compound is boron oxide.
- 6. A composition as claimed in claim 1 wherein said boron compound is sodium borate.
- 7. A composition for inhibiting the formation and deposition for coke on the heated metal surfaces in contact with a hydrocarbon feedstock which is undergoing pyrolytic processing to produce lower hydrocarbon fractions and said metal surfaces having a temperature of about 1600.degree. F. or higher, which improvement comprises a synergistic combination of a boron compound and a dihydroxybenzene compound selected from the group consisting of hydroquinone, resorcinol, catechol, and 4-tert-butyl resorcinol, wherein said boron compound is contained in a glycolic carrier selected from the group consisting essentially of ethylene glycol, propylene glycol, glycerol, hexylene glycols and polyethylene glycols.
- 8. A composition for inhibiting the formation and deposition of coke on the heated metal surfaces in contact with a hydrocarbon feedstock which is undergoing pyrolytic processing to produce lower hydrocarbon fractions and said metal surfaces having a temperature of about 1600.degree. F. or higher, which improvement comprises a synergistic combination of a boron compound and a dihydroxybenzene compound selected from the group consisting of hydroquinone, resorcinol, catechol, and 4-tert-butyl resorcinol, wherein said dihydroxybenzene compound is contained in a co-solvent carrier selected from the group consisting of water:diethylene glycol monobutyl ether and water:ethylene glycol.
Parent Case Info
This is a divisional of application Ser. No. 07/676,044 filed Mar. 27, 1991, now U.S. Pat. No. 5,128,123.
US Referenced Citations (12)
Foreign Referenced Citations (2)
Number |
Date |
Country |
275662 |
Aug 1928 |
GBX |
296752 |
Sep 1928 |
GBX |
Non-Patent Literature Citations (4)
Entry |
Chemical Abstracts: vol. 83:30687K 1975. |
Chemical Abstracts: vol. 87:154474r 1977. |
Chemical Abstracts: vol. 95:135651y 1981. |
Chemical Abstracts: vol. 92:8645j 1980. |
Divisions (1)
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Number |
Date |
Country |
Parent |
676044 |
Mar 1991 |
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