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Slow corrosion bactiriocide

A fungicide and corrosion-inhibiting technology, used in biocides, animal repellents, plant growth regulators, etc.

Inactive Publication Date: 2004-12-22
TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility of the agents, it often leads to problems such as reduced performance of the agents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In a four-necked flask equipped with a thermometer and a reflux condenser, add 0.1 mol (47.6 g) of an ethoxyimidazoline compound, and under stirring, slowly add 0.1 mol (17.4 g) of benzyl bromide. , slowly heat up to 60~100 ℃, heat preservation reaction 6~8 hours, heat preservation is finished, add 20g imidazoline derivatives, 25g ethylene glycol, 45g water, can make the corrosion inhibitor and fungicide of the present invention.

[0038] Its use effect is as follows:

[0039] (1) Corrosion inhibition performance

[0040] Experimental conditions: oily sewage in an oilfield, supplemented with [S 2- ]: 50ppm;

[0041] Mounting time: 48 hours; temperature: 80°C; CO 2 Pressure: 0.04~0.06MPa.

[0042] Experimental method: weightlessness method.

[0043] Table 1 Corrosion inhibition effect of corrosion inhibitor and fungicide

[0044] Agent concentration Blank 20 30 50

[0045] (mg / L)

[0046] Corrosion rate 40.96 5.32 0.68 0.53

[0047] (mpy)

[...

Embodiment 2

[0057] 70 g of sodium acetate ethoxy imidazoline quaternary ammonium salt, 50 g of imidazoline derivatives, 60 g of ethylene glycol and 20 g of water are added to the reactor in sequence, and stirred for 20 to 30 minutes to prepare the corrosion inhibitor and bactericide of the present invention. The agent has a higher corrosion inhibition rate for acidic concentrated brine at a lower concentration. Its use effect is shown in Table 3.

[0058] Experimental conditions: [NaCl]: 5%; supplemented with [S 2- ]: 40ppm; CO 2 except O 2 And maintain; water temperature: 50 ℃; hanging time: 48 hours.

[0059] Experimental method: weightlessness method.

[0060] Table 3 Corrosion inhibition effect of different dosage of corrosion inhibitor and fungicide

[0061] Agent concentration 5 10 20 30 40 Blank

[0062] (mg / L)

[0063] Corrosion rate (mpy) 5.039 2.732 1.896 0.932 0.800 16.36

[0064] Corrosion inhibition rate (%) 69.2 83.3 88.4 94.3 95.1 -

[0065] Surfa...

Embodiment 3

[0067] 50g of benzylethoxyimidazoline quaternary ammonium salt, 50g of imidazoline derivatives, 40g of ethylene acetal, and 60g of water were added to the reactor in turn and stirred for 20-30 minutes. The product has excellent properties as a pickling corrosion inhibitor. Corrosion inhibition properties. The anti-HCl corrosion inhibition effect is shown in Table 4, and the anti-H 2 SO 4 The corrosion inhibition effect is shown in Table 5.

[0068] (1) Experimental conditions: sample preparation with tap water; [HCl]: 7%; water temperature: 50°C; mounting time: 12 hours.

[0069] Experimental method: weightlessness method.

[0070] Table 4 Corrosion inhibition and fungicide resistance to HCl pickling corrosion inhibition performance

[0071] Chemical name Corrosion inhibitor and fungicide Blank Foreign control sample

[0072] Drug concentration (%) 0.2 Blank 0.2

[0073] Corrosion rate (mpy) 31 2625 32

[0074] Corrosion Inhibition Rate (%) 98.8 - 98.8

...

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Abstract

A corrosion-inhibiting bactericide for the recovered liquid, the oil-water mixture and the injecting back water in oil field contains alkoxy imidazoline quaternary ammonium salt, other imidazoline derivatives, alcohol solution and water. Its advantage is high effect on killing sulfate reducing bacteria and preventing corrosion.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to a one-agent double-effect type corrosion inhibitor and bactericide. Background technique [0002] Corrosion has always been a difficult problem in controlling the development and production of crude oil. Major oil companies around the world need to spend huge sums of money to solve this problem every year. However, the major economic losses, casualties and environmental pollution caused by corrosion are catastrophic. The consequences are still frequently reported. The main cause of corrosion in crude oil development and production and processing systems is the H 2 S, CO 2 Electrochemical corrosion, hydrogen embrittlement, etc. caused by the direct erosion of corrosive media such as HCl, salts, organic carboxylic acids, etc.; secondly, the perforation caused by the breeding of sulfate-reducing bacteria and other microorganisms and bacteria commonly present in the processing system corro...

Claims

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Application Information

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IPC IPC(8): A01N43/50
Inventor 滕厚开王素芳刘玉民靳晓霞郝兰锁胡兴刚马一骏李家俊
Owner TIANJIN CHEM RES & DESIGN INST
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