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US 9,845,437 B2Granted
Surface passivation method for fouling reduction
AssigneeEcolab USA Inc.
InventorsGregory T. Savage, Christopher A. Russell
Life of this patent
Estimating the term…
Abstract
A method of passivating a metal surface of hydrocarbon processing equipment is provided in which a water soluble molybdate compound is introduced into water or steam which is in contact or will come into contact with a metal surface of the hydrocarbon processing equipment to passivate the metal surface to inhibit surface coke formation.
Claims19
A method of passivating a metal surface of hydrocarbon processing equipment, the method comprising:
- removing coke from a metal surface of hydrocarbon processing equipment during a decoking process while the hydrocarbon processing equipment is shut down;
- and
- introducing a water soluble molybdate compound into water or steam which is in contact or will come into contact with the metal surface of the hydrocarbon processing equipment to passivate the metal surface while the hydrocarbon processing equipment is shut down, wherein the temperature in the hydrocarbon processing equipment ranges from about 15° C. to about 650° C. during passivation.
Dependencies are inferred from the claim text.