Corrosion inhibitor compositions and methods of using same
View Patent ↗Disclosed herein are sulfur-functional tall oil compositions, referred to herein as S-TO compositions. The S-TO is a sulfur-functional tall oil fatty amide composition, or sulfur-functional tall oil phosphate ester composition. Also disclosed herein are S-TO concentrates, which are stable and do not degrade to form H 2 S under standard storage conditions for a period of 1 day to 5 years. Also disclosed herein are treated water sources and treated metal containments including one or more S-TO compositions. The S-TO compositions inhibit corrosion of a metal containments contacted with one or more water sources, wherein the one or more water sources comprise one or more corrodents. The S-TO compositions are as effective or more effective at inhibiting corrosion than conventional sulfur-based corrosion inhibitors when compared on a weight basis.
1. A sulfur-functional tall oil composition comprising a product formed by combining a tall oil fatty amide with 2 mercaptoethanol in a molar ratio of 10:1 to about 1:1 amide to sulfur, and heating the combination in the absence of solvent to a temperature of about 60° C. to 150° C. for a period of about 1 minute to 12 hours; wherein the tall oil fatty amide has the structure R—C(O)NH—R′ wherein R is a tall oil fatty group and R′ is a group including 1 to 4 carbon atoms.
2. The sulfur-functional tall oil composition of claim 1 wherein R′ further comprises an hydroxyl moiety.
3. The sulfur-functional tall oil composition of claim 2 wherein after heating, the product is further combined with neat phosphoric acid and heated.
4. The sulfur-functional tall oil composition of claim 3 wherein the molar ratio of sulfur to phosphorus combined is about 1:1.
5. The sulfur-functional tall oil composition of claim 1 further comprising about 10 wt % to 99 wt % of a solvent added to the product after the heating, the solvent comprising a C 1 -C 6 alkanol, an alkoxyalkanol, a glycol, a glycol ether, or a mixture of two or more thereof.
6. An enclosed container comprising a sulfur-functional tall oil composition of claim 5 .
7. The enclosed container of claim 6 , wherein the container comprises a temperature of about −40° C. to 70° C.
8. A method comprising storing the enclosed container of claim 6 for a storage period of about 1 day to 5 years.
9. The method of claim 8 wherein the temperature of the container during the storage period is about −40° C. to 70° C.
10. A method of inhibiting corrosion of a metal containment, the method comprising
applying 0.5 ppm to 500 ppm by volume of a sulfur-functional tall oil composition of claim 1 to a water source comprising one or more corrodents to form a treated water source; and
contacting the treated water source with a metal surface or portion thereof in a metal containment.
11. The method of claim 10 wherein the metal containment is a tank or a pipe.
12. The method of claim 10 wherein the metal surface comprises a carbon steel.
13. The method of claim 10 wherein the water source comprises produced water or wastewater from a manufacturing process.