公开(公告)号：US20190271674A1

公开(公告)日：2019-09-05

申请号：US16281877

申请日：2019-02-21

Applicant: ECOLAB USA INC.

Inventor： Kishor Padmakar Dhake ,  Anup Pandurang Thakur ,  James Joseph Michels

IPC: G01N33/18 ,  G01N21/64 ,  C23F11/14

Abstract: The present disclosure generally relates to methods of measuring benzimidazole-based corrosion inhibitors in cooling water. Methods may include withdrawing a sample of water containing a benzimidazole-based compound from an aqueous system and adding an acid to the sample of water and/or diluting with water. Methods may also include exposing the sample of water to light energy of a selected excitation wavelength and measuring an intensity of emitted light about a selected fluorescence emission wavelength. The intensity of the emitted light may be compared to a standard curve, which can be a plot of fluorescence emission intensity of the benzimidazole-based compound versus concentration of the benzimidazole-based compound. The concentration of the benzimidazole-based compound in the sample of water may be determined from the standard curve.

公开(公告)号：US20190203362A1

公开(公告)日：2019-07-04

申请号：US16235043

申请日：2018-12-28

Applicant: ECOLAB USA INC.

Inventor： Yanjiao Xie ,  Jothibasu Seetharaman ,  James Joseph Michels ,  Frederick Swiecinski ,  Donald A. Johnson ,  Pradeep Cheruku

IPC: C23F11/14 ,  C07D235/12

CPC classification number: C23F11/149 ,  C07D235/12

Abstract: This disclosure relates to compositions and methods of reducing corrosion using benzimidazoles. The method may include adding a benzimidazole and a halogen to an aqueous system that is in contact with a metal surface. The halogen may be bromine, iodine, or any combination thereof. In some cases, adding the halogen may be optional depending on the substituents on the benzimidazole ring. Compositions are also disclosed that include a benzimidazole, optionally a halogen depending on the substituents on the benzimidazole ring, and optionally a halogen stabilizer.

公开(公告)号：US11572628B2

公开(公告)日：2023-02-07

申请号：US16235043

申请日：2018-12-28

Applicant: ECOLAB USA INC.

Inventor： Yanjiao Xie ,  Jothibasu Seetharaman ,  James Joseph Michels ,  Frederick Swiecinski ,  Donald A. Johnson ,  Pradeep Cheruku

IPC: C23F11/14 ,  C07D235/12

Abstract: This disclosure relates to compositions and methods of reducing corrosion using benzimidazoles. The method may include adding a benzimidazole and a halogen to an aqueous system that is in contact with a metal surface. The halogen may be bromine, iodine, or any combination thereof. In some cases, adding the halogen may be optional depending on the substituents on the benzimidazole ring. Compositions are also disclosed that include a benzimidazole, optionally a halogen depending on the substituents on the benzimidazole ring, and optionally a halogen stabilizer.

公开(公告)号：US11053203B2

公开(公告)日：2021-07-06

申请号：US16185304

申请日：2018-11-09

Applicant: Ecolab USA Inc.

Inventor： Pradeep Cheruku ,  Suresh R. Sriram ,  James Joseph Michels

IPC: C07D235/12 ,  C07D235/18 ,  C07D235/08 ,  C07D401/04 ,  C23F11/14

Abstract: 2-substituted benzimidazoles and methods of preparing the same are disclosed. The compositions may include a compound or salt thereof, an acid, and 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.

公开(公告)号：US20190144395A1

公开(公告)日：2019-05-16

申请号：US16185304

申请日：2018-11-09

Applicant: Ecolab USA Inc.

Inventor： Pradeep Cheruku ,  Suresh R. Sriram ,  James Joseph Michels

IPC: C07D235/12 ,  C07D401/04 ,  C07D235/08 ,  C23F11/14

Abstract: 2-substituted benzimidazoles and methods of preparing the same are disclosed. The compositions may include a compound or salt thereof, an acid, and 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.