公开(公告)号：US20220363977A1

公开(公告)日：2022-11-17

申请号：US17622678

申请日：2020-07-29

Applicant: STEPAN COMPANY

Inventor： Maxime Feche ,  Mathieu Pepin ,  Elodie Shaw ,  Laure Canal ,  José Santiago ,  Milan Bartos ,  Alla Crabtree

IPC: C09K8/54 ,  C23F11/14

Abstract: A method for inhibiting corrosion of pipelines and other metal surfaces, particularly those used in the oil-and-gas industry, is disclosed. The method comprises treating a brine-exposed metal surface with a film-forming composition. The composition comprises a quaternary surfactant, which is made by reacting a polyalkylene glycol (PAG), a haloalkanoic acid, and a tertiary fatty amine that optionally incorporates amide or ester functionality. The surfactant comprises a PAG monoester quat and a PAG diester diquat and may have other components. The quaternary surfactants provide good corrosion protection and can partition effectively from an oily phase into a brine phase in the absence of agitation. The surfactants are easy to synthesize economically and have structures that can be tailored to meet local HLB requirements.

公开(公告)号：US11879093B2

公开(公告)日：2024-01-23

申请号：US17622678

申请日：2020-07-29

Applicant: STEPAN COMPANY

Inventor： Maxime Feche ,  Mathieu Pepin ,  Elodie Shaw ,  Laure Canal ,  José Santiago ,  Milan Bartos ,  Alla Crabtree

IPC: C09K8/54 ,  C23F11/14

CPC classification number: C09K8/54 ,  C23F11/141 ,  C09K2208/32

Abstract: A method for inhibiting corrosion of pipelines and other metal surfaces, particularly those used in the oil-and-gas industry, is disclosed. The method comprises treating a brine-exposed metal surface with a film-forming composition. The composition comprises a quaternary surfactant, which is made by reacting a polyalkylene glycol (PAG), a haloalkanoic acid, and a tertiary fatty amine that optionally incorporates amide or ester functionality. The surfactant comprises a PAG monoester quat and a PAG diester diquat and may have other components. The quaternary surfactants provide good corrosion protection and can partition effectively from an oily phase into a brine phase in the absence of agitation. The surfactants are easy to synthesize economically and have structures that can be tailored to meet local HLB requirements.