A method for inhibiting coke formation with phosphonate/thiophosphonate

A method to inhibit coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions is disclosed. The heat transfer surfaces are treated with an effective amount of phosphonate to inhibit coke formation on the heat transfer surfaces, the phosphonate bei...

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Bibliographic Details
Main Authors TONG, YOUDONG, POINDEXTER, MICHAEL K
Format Patent
LanguageEnglish
French
German
Published 01.08.2001
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADHESIVES
CHEMISTRY
CRACKING HYDROCARBON OILS
DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
DYES
FUELS
LUBRICANTS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MINERAL WAXES
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
POLISHES
PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION
RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES
REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS
REFORMING OF NAPHTHA
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary:A method to inhibit coke formation on heat transfer surfaces used to heat or cool a petroleum feedstock at coke-forming conditions is disclosed. The heat transfer surfaces are treated with an effective amount of phosphonate to inhibit coke formation on the heat transfer surfaces, the phosphonate being of the formula (R'Y)2P(X)R", wherein X and Y are O or S and R' and R" are hydrocarbyl or heteroatom-containing, with the proviso that the hetero atom is not directly bonded to the phosphorus atom.
Bibliography:Application Number: EP19980300002