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US 11,697,756 B2Granted
Oil soluble molybdenum complexes as high temperature fouling inhibitors
AssigneeEcolab USA Inc.
InventorsOmer Gul, Oussama Zenasni, Janelle Pennington
Life of this patent
Estimating the term…
Abstract
Disclosed are molybdenum-containing complexes used in compositions and methods for inhibiting or reducing the deposition of foulant on equipment.
Claims20
A method of inhibiting deposition of a foulant comprising:
- a) prior to introducing a hydrocarbon feedstock into a process equipment, pre-passivating the process equipment to provide treated, passivated process equipment, said pre-passivating comprising contacting the process equipment with a passivating composition comprising a molybdenum-containing complex comprising:
- at least one molybdenum-containing complex having the formula selected from the group consisting of Formula I, II, III, and IV:
- wherein each of R1, R2, R3, and R4, is a hydrocarbon group and wherein R1, R2, R3, and R4 can be the same or different each X is oxygen or sulfur and X can be the same or different;
- and each of Y1 and Y2 is oxygen, nitrogen or carbon-containing ligands and Y1 and Y2 can be the same or different;
- and
- b) using the treated, passivated process equipment to process a hydrocarbon feedstock comprising a foulant;
- and
- c) introducing a fouling inhibiting composition into the hydrocarbon feedstock, wherein the fouling inhibiting composition comprises at least one molybdenum-containing complex having the formula selected from the group consisting of Formula I, II, III, and IV as defined above.
5 more elements
A method of inhibiting deposition of a foulant on a process equipment surface, comprising the steps of:
- a) prior to contacting the process equipment surface with a hydrocarbon feedstock, pre-passivating the process equipment surface to provide a treated, passivated process equipment surface, said pre-passivating comprising contacting the process equipment surface with a passivating composition, said passivating composition comprising a molybdenum-containing complex comprising a molybdenum center and first and second phosphorous containing ligands, wherein each phosphorous containing ligand is independently linked to the molybdenum center by an S or O linkage;
- b) using the treated, passivated process equipment to process a hydrocarbon feedstock comprising a foulant;
- and
- c) introducing a fouling inhibiting composition into the hydrocarbon feedstock, wherein the fouling inhibiting composition comprises at least one molybdenum-containing complex comprising a molybdenum-containing complex comprising a molybdenum center and first and second phosphorous containing ligands, wherein each phosphorous containing ligand is independently linked to the molybdenum center by an S or O linkage.
1 more element
A method of inhibiting deposition of a foulant on a process equipment surface, comprising the steps of:
- a) prior to contacting the process equipment surface with a hydrocarbon feedstock, pre-passivating the process equipment surface to provide a treated, passivated process equipment surface, said pre-passivating comprising contacting the process equipment surface with a passivating composition, said passivating composition comprising a molybdenum-containing complex comprising a molybdenum center and first and second phosphorous containing ligands, wherein each phosphorous containing ligand is independently linked to the molybdenum center by an S or O linkage;
- and
- b) using the treated, passivated process equipment to process a hydrocarbon feedstock comprising a foulant.
Dependencies are inferred from the claim text.