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A kind of oilfield corrosion inhibitor and bactericide and preparation method thereof

A bactericide and corrosion-inhibiting technology, applied in the field of corrosion-inhibiting bactericide and its preparation, can solve the problems of reduced application and actual effect, inconvenient transportation, small working space, etc., and achieve reduced corrosion risk, excellent corrosion inhibition performance and bactericidal performance , the effect of using a small amount

Active Publication Date: 2017-09-26
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inconvenient transportation and small working space in offshore oilfields, there are only a small amount of chemical dosing facilities and storage space, and it is often required to use one agent for multiple uses and low dosage. At the same time, considering the corrosion problem in the refining process, it is required that the chemical agent should be low in sulfur content and the most Fortunately, it does not contain sulfur, which greatly reduces the application and actual effect of existing technologies in offshore oil fields

Method used

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  • A kind of oilfield corrosion inhibitor and bactericide and preparation method thereof
  • A kind of oilfield corrosion inhibitor and bactericide and preparation method thereof
  • A kind of oilfield corrosion inhibitor and bactericide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] (1) First, 54.9g (0.25mol) 1-(3-chloro-2hydroxypropyl)-2-methyl-5-nitroimidazole, 216g (1mol) 1,4-dibromobutane, 1354.5g Mix ethylene glycol, heat up to 140°C, and react for 6 hours;

[0032] (2) Add 267.5g (1mol) undecyl imidazoline again, and continue to react for 5 hours at 140°C;

[0033] (3) 37.9g ​​of hexamethylenetetramine, 94g of dodecylpyridinium quaternary ammonium salt and 37.9g ​​of sodium salicylate were sequentially added to the reaction product of step (2) to obtain the oil field corrosion inhibitor bactericide.

Embodiment 2

[0035] (1) First, 110g (0.5mol) 1-(3-chloro-2 hydroxypropyl)-2-methyl-5-nitroimidazole, 216g (1mol) 1,4-dibromobutane, 1630gN,N - Dimethylacetamide was mixed, heated to 150°C, and reacted for 7 hours;

[0036] (2) Add 360g (1mol) 9-heptadecenyl imidazoline, and continue to react for 6 hours at 150°C;

[0037] (3) in the reaction product of step (2), add 116g hexamethylenetetramine, 26.32g dodecylpyridinium quaternary ammonium salt, 20g tetradecylpyridinium quaternary ammonium salt, 116g potassium salicylate, obtain final product Oilfield corrosion inhibitors and fungicides.

Embodiment 3

[0039] (1) First, 171.2 (1mol) g1-(2-hydroxyethyl)-2-methyl-5-nitroimidazole, 264g (1mol) dibromobenzyl, 1000g n-amyl alcohol and 1176g N, N-dimethylformazol Mix amides, heat up to 100°C, and react for 4 hours;

[0040] (2) Add 105g (0.55mol) phenylimidazoline and 100g (0.52mol) cycloalkylimidazoline again, and continue to react for 7 hours at 100°C;

[0041] (3) 56.5g of hexamethylenetetramine, 120g of cetylpyridinium quaternary ammonium salt, and 56.5g of sodium salicylate were sequentially added to the reaction product of step (2) to obtain the oil field corrosion inhibitor bactericide.

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Abstract

The invention discloses an oilfield corrosion inhibitor and bactericide and a preparation method thereof. Firstly, sulfur-free nitroxazoline compounds are mixed with dihalides, and an organic solvent is added to react for 3-7 hours after heating; then imidazole is added The reaction is continued for 3-7 hours; finally, hexamethylenetetramine, long-chain alkylpyridine quaternary ammonium salt, and salicylate are sequentially added to the reaction product to obtain an oil field corrosion inhibitor bactericide. The oil field corrosion inhibitor and bactericide of the present invention not only has the function of corrosion inhibition and sterilization, but also does not contain sulfur, is very suitable for anticorrosion and bacterial control in offshore oil fields, and has the characteristics of small dosage and high corrosion inhibition and sterilization rate; the preparation method of the present invention It is relatively simple, the process requirements are not high, and it is easy to mass produce.

Description

technical field [0001] The invention belongs to the technical field of chemical anticorrosion and sterilization, and in particular relates to a corrosion-inhibiting bactericide and a preparation method thereof. Background technique [0002] With the continuous exploitation of oil fields, the water content continues to rise, and the problems of corrosion and bacterial growth have become increasingly prominent. CO 2 and H 2 S corrosion is one of the main causes of corrosion failure of water treatment system equipment and pipelines, which causes huge economic losses every year. At the same time, SRB bacteria will make the H in the oil field 2 The content of S is obviously increased, which greatly intensifies the corrosion. Adding corrosion inhibitors and bactericides can effectively and economically achieve the purpose of anti-corrosion and bacterial control. Therefore, adding corrosion inhibitors and bactericides has become a necessary procedure for many oil and gas fields...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/54
Inventor 陆原贾永富程艳李支文郭海军胡廷张国欣
Owner CHINA NAT OFFSHORE OIL CORP