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Application of Sophorolipid in Biological Corrosion Inhibitor for Oilfield Produced Water

A technology of microbial fermentation biosurfactant and produced water, which is applied in the application field of biosurfactants in corrosion inhibitors, and achieves the effects of high application value, low toxicity and simple preparation.

Inactive Publication Date: 2015-12-02
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, there have been many literature reports on the research of sophorolipids in the fields of pharmacy, medicine, cosmetics, cleaning agents, etc. However, there have been no reports on the application of sophorolipids in corrosion inhibitors for oil production water.

Method used

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  • Application of Sophorolipid in Biological Corrosion Inhibitor for Oilfield Produced Water
  • Application of Sophorolipid in Biological Corrosion Inhibitor for Oilfield Produced Water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation of sophorolipid

[0023] (1) Strain selection: Candida ( Candida bombicola )ATCC22214;

[0024] (2) Slant culture: inoculate the strains in GYU slant medium supplemented with 20% agar, and culture at 30°C for 48 hours;

[0025] (3) Seed culture: Pick a loop of the strain cultured in step (2) under aseptic conditions with an inoculation loop and place it in 50 mL of GYU liquid medium, and culture it at a constant temperature for 24 hours at 30°C with shaking to obtain a seed culture solution;

[0026] (4) Fermentation culture: Inoculate the above seed culture liquid into 100mL GYU medium with an inoculum volume of 5% by volume, and then add rapeseed oil to the above GYU medium at 0h and 48h of fermentation culture respectively, rapeseed The total volume of oil added is 6% of the volume of the GYU fermentation medium, the fermentation temperature is 30°C, and the total time of constant temperature shaking culture is 120h;

[0027] (5) Coll...

Embodiment 2

[0033] Embodiment 2: Application of sophorolipids of the present invention in biological corrosion inhibitors for oil production water

[0034] (1) Preparation of biological corrosion inhibitor A: Prepare the sophorolipid extract obtained in Example 1 to prepare an aqueous solution with a sophorolipid concentration of 10-50 mg / L;

[0035] (2) Corrosion test: According to the Petroleum and Natural Gas Industry Standard SY / T5273-2000 of the People's Republic of China, the carbon steel test piece and the biological corrosion inhibitor were pretreated, and then the static coupon corrosion test was carried out, and the corrosion rate was finally calculated. The results are shown in the table 2.

[0036] Table 225 ℃, the laboratory corrosion inhibition effect evaluation data of different concentrations of corrosion inhibitor A on carbon steel

[0037] Corrosion inhibitor A concentration (mg / L) Uniform corrosion rate (mm / a) Corrosion inhibition rate (%) blank 0.2...

Embodiment 3

[0039] Embodiment 3: Application of sophorolipids of the present invention in biological corrosion inhibitors for oil production water

[0040] (1) Preparation of biological corrosion inhibitor B: use the supernatant of the fermented broth of saturated sophorolipids obtained in Example 1, and dilute appropriately.

[0041] (2) Corrosion test: According to the Petroleum and Natural Gas Industry Standard SY / T5273-2000 of the People's Republic of China, the carbon steel test piece and the biological corrosion inhibitor were pretreated, and then the static coupon corrosion test was carried out, and the corrosion rate was finally calculated. The results are shown in the table 3.

[0042]Table 325 ° C, different concentrations of corrosion inhibitor B on carbon steel laboratory corrosion inhibition evaluation data

[0043] Corrosion inhibitor B Uniform corrosion rate (mm / a) Corrosion inhibition rate (%) blank 0.2633

[0044] It can be seen from Table 3 that th...

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Abstract

The invention discloses a biological corrosion inhibitor for petroleum produced water by adopting biological surface active agent or sophorolipid as an effective constituent, which belongs to the field of the petrochemical engineering. The sophorolipid is prepared by fermenting candida mycoderma bacteria, the preparation method has the characteristics such as high yield, low cost, high purity and simple process, and the sophorolipid or the fermenting liquid produced by fermenting the sophorolipid is applied to the development of the biological corrosion inhibitor for petroleum produced water. When the concentration of sophorolipid is 50mg / L, the corrosion inhibiting efficiency can reach more than 95 percent under the condition of normal temperature, the corrosion rate of the petroleum produced water on equipment and pipelines can be effectively reduced, and the service life of the equipment can be prolonged. Compared with the existing corrosion inhibitor, the biological corrosion inhibitor adopted by the invention is high in corrosion inhibiting efficiency, simple to prepare, low in price and easy to obtain and has the characteristics of low toxicity and good environmental friendliness.

Description

technical field [0001] The invention relates to the application of a biosurfactant in a corrosion inhibitor, in particular, it relates to the application of the biosurfactant sophorolipid or a mixture with sophorolipid as an active ingredient in a biological corrosion inhibitor for oil production water The application belongs to the field of petrochemical industry. Background technique [0002] With the development of oilfields, more than 85% of the oilfields are currently using water injection technology, which makes the water content in crude oil continue to increase. Corrosion of oilfield produced water, oilfield sewage treatment and corrosion in the process of reinjection have seriously affected the normal development of oilfields. Adding corrosion inhibitors in these processes can effectively inhibit the corrosion of corrosive substances on metal equipment and pipelines, thereby ensuring the normal production of oil fields and the improvement of economic benefits. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/54C12P19/44C12R1/72
CPCC09K8/54C09K2208/32C12P19/44
Inventor 宋丹丹尚玉俊梁生康王秀莉
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI