Mitigating internal corrosion of crude oil transportation pipeline

Patent metadata

Field	Value
Publication number	US-11286571-B2
Application number	US-202016801712-A
Country	US
Kind code	B2
Filing date	Feb 26, 2020
Priority date	May 21, 2019
Publication date	Mar 29, 2022
Grant date	Mar 29, 2022

Abstract

The present invention relates to development of high performing oil soluble and water dispersible corrosion inhibitor composition for mitigating internal corrosion of crude oil pipelines during storage and transportation of crude oils. The developed composition consists of acid-amine complex as corrosion inhibiting agent, mixture of organic acids as dispersing agent and ester derivative of alkylated phenol for better film formation. The present invention further relates to a process of preparation of the oil soluble and water dispersible corrosion inhibitor composition and subsequently a process for protecting the corrosion of internal metal surface of crude oil transportation pipelines using the corrosion inhibitor composition.

First claim

The invention claimed is:

1. An oil soluble water dispersible corrosion inhibitor composition, the composition consisting of:
(a) a dimer fatty acid (DFA), wherein the dimer fatty acid (DFA) has about 30-50 carbon atoms in its alkyl chain;
(b) an alkyl amine having 12-18 carbon atoms;
(c) an ester derivative of alkylated phenol;
(d) an organic acid or a mixture of organic acids; and
(e) a solvent.

2. The composition as claimed in claim 1 , wherein the dimer fatty acid (DFA) is present in an amount ranging from 40 to 80% by weight.

3. The composition as claimed in claim 1 , wherein the alkyl amine is present in an amount ranging from 1 to 10% by weight.

4. The composition as claimed in claim 1 , wherein the ester derivative of alkylated phenol is present in an amount ranging from 0.01 to 7% by weight.

5. The composition as claimed in claim 1 , wherein the organic acid or mixture of organic acids is present in an amount ranging from 5 to 10% by weight.

6. The composition as claimed in claim 1 , wherein the solvent is present in an amount ranging from 10 to 40% by weight.

7. The composition as claimed in claim 1 , wherein the organic acid has 2 to 18 carbon atoms.

8. The composition as claimed in claim 1 , wherein the organic acid or mixture of organic acids is selected from the group consisting of acetic acid, oleic acid, myristic acid, fatty acids, and combinations thereof.

9. The composition as claimed in claim 1 , wherein the solvent is selected from the group consisting of xylene, toluene, alkylated benzene, isopropanol, 2-ethyl-1-hexanol, butanol, pentanol, pre-fractionator rerun column bottom, and combinations thereof.

10. A process for preparation of an oil soluble water dispersible corrosion inhibitor composition, the process consisting of:
(a) dissolving a dimer fatty acid in a solvent to obtain a mixture (i), wherein the dimer fatty acid (DFA) has about 30-50 carbon atoms in its alkyl chain;
(b) adding an alkyl amine drop wise to the mixture (i) obtained in step (a) to obtain a mixture (ii) and stirring the mixture (ii) at a temperature ranging from 40° C.-60° C., wherein the alkyl amine has 12-18 carbon atoms;
(c) adding an ester derivative of an alkylated phenol to the mixture obtained in step (b) to obtain a mixture (iii);
(d) adding an organic acid or a mixture of organic acids to the mixture (iii) obtained in step (c) to obtain a mixture (iv); and
(e) stirring the mixture (iv) obtained in step (d) at room temperature to obtain the corrosion inhibitor composition, wherein the process is a single step reaction.

11. The process as claimed in claim 10 , wherein the solvent is an aromatic solvent or an aliphatic solvent or a petroleum solvent, selected from the group consisting of xylene, toluene, alkylated benzene, isopropanol, 2-ethyl-1-hexanol, butanol, pentanol, pre-fractionator rerun column bottom, or combinations thereof.

12. The process as claimed in claim 10 , wherein the organic acid is selected from the group consisting of acetic acid, oleic acid, myristic acid, fatty acids, or combinations thereof.

13. The process as claimed in claim 10 , wherein the stirring in step (b) is performed for a period ranging from 1 to 2 hours and stirring in step (e) is performed for a period ranging from 0.5 to 1 hour.

14. A process for mitigating internal corrosion of crude oil transportation pipeline, the process comprising adding the oil soluble water dispersible corrosion inhibitor of claim 1 to crude oil to be stored or transported.

Assignees

• Indian Oil Corp Ltd

Inventors

• Shanti Prakash
• Mandal Tanmay
• Arora Ajay Kumar
• Kagdiyal Vivekanand
• Puri Suresh Kumar
• Mazumdar Sanjiv Kumar
• RAMAKUMAR Sankara Sri Venkata

Classifications

• C23F11/124

  Carboxylic acids · CPC title

• C09K8/54 Primary

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C23F11/141

  Amines; Quaternary ammonium compounds · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title

• C23F11/126 Primary

  Aliphatic acids · CPC title