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：US11180588B2

公开(公告)日：2021-11-23

申请号：US16475343

申请日：2016-12-30

Applicant: STEPAN COMPANY

Inventor： Rachael Anne Cole ,  Pradyumna Avinash Deshpande ,  Chandrashekhar Yeshwant Khandekar ,  Tore Nordvik ,  Loic Regnault De La Mothe ,  Elodie Shaw ,  Laure Canal ,  Marine Dugand ,  José Santiago

IPC: C08F210/10 ,  C08F8/46 ,  C08G83/00 ,  C08F220/28 ,  C08G81/02 ,  C09K8/524

Abstract: Compositions may include those of the formula: (I) wherein R1 is an alkyl chain having a carbon number in the range of greater than 40 to 200, R2 is a multiester, R3 is hydrogen, an ion, or an alkyl chain having a carbon number in the range of 1 to 200, m is an integer selected from 0 to 4, and n is an integer selected from the range of 0 to 4, wherein the sum of m and n is 1 or greater. Compositions may include a reaction product of a polyisobutylene-substituted succinic anhydride and a hydroxy-functional dendrimer, wherein the molar ratio of polyisobutylene-substituted succinic anhydride to hydroxy-functional dendrimer is within the range of 10:1 to 30:1.

公开(公告)号：US11725132B2

公开(公告)日：2023-08-15

申请号：US17501838

申请日：2021-10-14

Applicant: STEPAN COMPANY

Inventor： Rachael Anne Cole ,  Pradyumna Avinash Deshpande ,  Chandrashekhar Yeshwant Khandekar ,  Tore Nordvik ,  Loic Regnault De La Mothe ,  Elodie Shaw ,  Laure Canal ,  Marine Dugand ,  José Santiago

IPC: C09K8/524 ,  C08F8/46 ,  C08F210/10 ,  C08G81/02 ,  C08G83/00 ,  C08F220/28

CPC classification number: C09K8/524 ,  C08F8/46 ,  C08F210/10 ,  C08F220/28 ,  C08G81/027 ,  C08G83/004 ,  C08F220/281

Abstract: Compositions may include those of the formula: (I) wherein R1 is an alkyl chain having a carbon number in the range of greater than 40 to 200, R2 is a multiester, R3 is hydrogen, an ion, or an alkyl chain having a carbon number in the range of 1 to 200, m is an integer selected from 0 to 4, and n is an integer selected from the range of 0 to 4, wherein the sum of m and n is 1 or greater. Compositions may include a reaction product of a polyisobutylene-substituted succinic anhydride and a hydroxy-functional dendrimer, wherein the molar ratio of polyisobutylene-substituted succinic anhydride to hydroxy-functional dendrimer is within the range of 10:1 to 30:1.

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.