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.

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：US11203811B2

公开(公告)日：2021-12-21

申请号：US16807683

申请日：2020-03-03

Applicant: Stepan Company

Inventor： Alla Crabtree ,  Laura Lee Whitlock

IPC: C23F11/16 ,  C09K8/54 ,  C23F11/10

Abstract: A corrosion inhibitor active and method for reducing corrosion of a metal surface in contact with a corrosive environment is disclosed. The corrosion inhibitor active is an organic sulfonated compound that is derived from the sulfonation of one or more carboxylic acids, internal olefins, or alpha-olefins having a carbon chain length of 15 to 26 carbon atoms. The method of reducing corrosion includes contacting the metal surface with an effective amount of the corrosion inhibitor active. The corrosion inhibitor active is useful in high temperature corrosive environments, such as those found in oil and gas operations.