| US 7,491,318 B2 | ||
| Method for prevention of corrosion by naphthenic acids in refineries | ||
| Francis Humblot, Lanneplaa (France) | ||
| Assigned to Arkema France, Colombes (France) | ||
| Appl. No. 10/563,549 PCT Filed Jun. 25, 2004, PCT No. PCT/FR2004/001608 § 371(c)(1), (2), (4) Date Jan. 05, 2006, PCT Pub. No. WO2005/014758, PCT Pub. Date Feb. 17, 2005. |
||
| Claims priority of application No. 03 08250 (FR), filed on Jul. 07, 2003. | ||
| Prior Publication US 2006/0157387 A1, Jul. 20, 2006 | ||
| Int. Cl. C10G 17/00 (2006.01); C10G 17/10 (2006.01); C09K 3/00 (2006.01); C23F 11/00 (2006.01) | ||
| U.S. Cl. 208—255 [208/47; 252/387; 252/388; 252/389.1; 252/390; 252/391; 252/395; 422/7] | 12 Claims |
| 1. A process for combating the corrosion by naphthenic acids of the metal walls of a refining plant, characterized in that
it comprises the addition, to a hydrocarbon stream having a TAN of greater than 0.2 to be treated by the refining plant, of
an effective amount of a corrosion inhibitor consisting essentially of a compound of formula:
HS—B—COOR (I) in which:
B represents a saturated divalent hydrocarbon radical which can either be acyclic, in the linear or branched form, or cyclic
and which comprises from 1 to 18 carbon atoms; and
R represents a hydrogen atom, an alkali or alkaline earth metal, an ammonium group, or an alkyl (linear or branched), cycloalkyl,
aryl, alkylaryl or arylalkyl radical, said radical comprising from 1 to 18 carbon atoms and optionally one or more heteroatoms.
|