Microbecidal composition and a method for mitigating internal microbiological influenced corrosion in petroleum transporting pipelines

Patent metadata

Field	Value
Publication number	US-11739252-B2
Application number	US-202117199226-A
Country	US
Kind code	B2
Filing date	Mar 11, 2021
Priority date	Mar 11, 2020
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The present invention provides a composition and a method for mitigating formation or activity of a corrosion-associated biofilm on metal surfaces of pipelines. The pipelines are first treated with pigs i.e. bi-di pigs for removing/disturbing biofilm, followed by microbial treatment i.e. application of microbecidal composition. The microbecidal composition comprising at least one alcohol, one corrosion inhibitor, one surfactant, one biocide and a lignin-based nanoparticle. The lignin-based nano particle is functionalized with amine functionalizing agent. The present composition and method is eco-friendly, as low concentration is sufficient and further, regular dosing is not required for MIC control.

First claim

The invention claimed is:

1. A microbicidal composition consisting of:
(i) a lignin-based nanoparticle in an amount ranging from 2000-20,000 ppm;
(ii) a biocide in an amount ranging from 500-5000 ppm;
(iii) a surfactant in an amount ranging from 100-1000 ppm;
(iv) a corrosion inhibitor in an amount ranging from 50-500 ppm; and
(v) at least one alcohol, wherein the lignin-based nanoparticle, the biocide, the surfactant, and the corrosion inhibitor are dispersed in the at least one alcohol, and wherein the microbicidal composition mitigates internal microbiological influenced corrosion caused by a bacterial biofilm deposited on a metal surface in petroleum transporting pipelines.

2. The microbicidal composition as claimed in claim 1 , wherein the lignin-based nanoparticle is functionalized with amine functionalizing agent.

3. The microbicidal composition as claimed in claim 2 , wherein the lignin-based nanoparticle has a size in a range of 20-50 nm.

4. The microbicidal composition as claimed in claim 1 , wherein the biocide is selected from the group consisting of aldehydes, acrolein, quaternary ammonium compounds, amines, diamines, isothiazolones, methyl chloromethyl-isothiazolone, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, Tetrakis(hydroxymethyl) phosphonium sulfate, Didecyldimethylammonium chloride, Didecyldimethylammonium carbonate and a combination thereof.

5. The microbicidal composition as claimed in claim 1 , wherein the alcohol is selected from the group consisting of ethanol and isopropanol, a glycol, ethylene glycol, diethylene glycol, 1,2-propylene glycol, dipropylene glycol, tripropylene glycol, a glycol ether, butyl glycol and butyl diglycol, a glycol ester, butyl diglycol acetate, 2, 2, 4-trimethylpentanediol monoisobutyrate, polyethylene glycol, polypropylene glycol, benzyl alcohol, n-butyl alcohol, benzyl alcohol, 2, 4-dichlorobenzyl alcohol, 2-phenoxyethanol and a combination thereof.

6. The microbicidal composition as claimed in claim 1 , wherein the components (i)-(iv) of composition are dispersed in alcohol.

7. The microbicidal composition as claimed in claim 1 , wherein the surfactant is selected from the group consisting of long chain alkylamine or N-based alkylamines and derivatives, N-[2-[(2-Aminoethyl) amino] ethyl]-9-octadecenamide, n-Benzalkonium chloride (BAC), C n H (2 n+1 )-COO(CH 2 CH 2 O)12CH 3 , polyoxyethylene alkyl ether, n-alkyl trimethyl ammonium surfactant, potassium alkanoate, Dodecylpyridinium bromide, octylglucoside, sodium dodecyl sulfate, trans-Cinnamaldehyde, sodium bis-(2-ethylhexyl)-sulfosuccinate, cetylpyridinium chloride, primary alcohol ethoxylate, polyoxyethylene nonyl phenyl ether, polyethylene glycol esters, linoleate, dodecyl amine and a combination thereof.

8. The microbicidal composition as claimed in claim 1 , wherein the corrosion inhibitor is selected from the group consisting of N,N-dimethylethanolamines, (N,N-dimethylaminoethoxy) ethanol; dimethylethanolamine; triethanolamine; methyldiethanolamine; ethanolamine; diethanolamine; other cyclic amines including morpholine, methylmorpholine, ethylmorpholine, piperidine, alkylpiperidines, piperazine, alkylpiperazines; ethyleneamines including DETA, TETA, TEPA, and the like; alkylamines including methylamine, dimethylamine, alkylmethylamines, dimethylalkylamines; methylaminopropylamine; dimethylaminopropylamine; dimethylaminoethylamine; methylaminoethylamine, oleic acid and a combination thereof.

Assignees

• Indian Oil Corp Ltd

Inventors

• Kumar Manoj
• AMIR Qazi Mohammad
• Sahoo Prakash Chandra
• Puri Suresh Kumar
• RAMAKUMAR Sankara Sri Venkata

Classifications

• C09K8/54 Primary

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

• A01N25/12

  Powders or granules (A01N25/26 takes precedence) · CPC title

• A01N33/12

  Quaternary ammonium compounds · CPC title

• A01N35/02

  containing aliphatically bound aldehyde or keto groups, or thio analogues thereof; Derivatives thereof, e.g. acetals · CPC title

• A01N43/80

  five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2 · CPC title