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US 12,698,267 B2Granted
One-pot homogeneous process for the large scale manufacture of 2-substituted benzimidazoles
AssigneeEcolab USA Inc.
InventorsPradeep Cheruku, Patricia Gillenwater, Nicolas Leflemme, Alexander Mantis, James Joseph Michels, Suresh R. Sriram
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Abstract
2-substituted benzimidazoles and methods of preparing the same are disclosed. The compositions may include a compound or salt thereof, a strong acid, and a carboxylic acid. The compositions may exclude a polar aprotic solvent. The compositions may be used to inhibit corrosion of a metal surface in contact with an aqueous system, and provide enhanced protection against corrosion of metals in the aqueous system.
Claims9
A composition, comprising:
- a strong acid, a carboxylic acid, and a compound or salt thereof of formula (I):
- wherein
- each X is independently hydrogen, halogen, or a C1-5 alkyl group, and m is 1, 2, 3, or 4;
- R1 is hydrogen, a C1-C12 alkyl group, or a C4-C6 aryl group;
- R2 is absent, hydrogen, a C1-C12 alkyl group, or a C4-C6 aryl group;
- R3 is a bond or CHR4;
- R4 is hydrogen, halogen, NR5R6, or OR5;
- wherein R5 and R6 are each independently hydrogen, a C1-C12 alkyl group, or a C4-C6 aryl group;
- and
- each Z is independently selected from CH and N,
- wherein:
- the carboxylic acid is acetic acid, and
- the composition comprises greater than 10 wt. % to 70 wt. % of the carboxylic acid, and further wherein the composition excludes a polar aprotic solvent.
10 more elements
Dependencies are inferred from the claim text.