Method for Determination of Active Substances in Daqing Oilfield Petroleum Sulfonate Samples by Liquid Chromatography

A petroleum sulfonate and liquid chromatography technology, which is applied in the field of quality analysis and monitoring of chemical flooding surfactants in oilfields, can solve the problems of large amount of solvent, certain deviation, long analysis time, etc., and achieves stable detection performance and small quantitative error. , the effect of fast analysis

Active Publication Date: 2021-04-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a liquid chromatographic method for the unfavorable status quo such as long analysis time, large amount of solvent, obvious pollution, cumbersome operation, and certain deviations in the existing extraction method for analyzing and detecting the content of active substances in petroleum sulfonate samples. Method for Determination of Active Matter Content in Daqing Oilfield Petroleum Sulfonate Samples

Method used

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  • Method for Determination of Active Substances in Daqing Oilfield Petroleum Sulfonate Samples by Liquid Chromatography
  • Method for Determination of Active Substances in Daqing Oilfield Petroleum Sulfonate Samples by Liquid Chromatography
  • Method for Determination of Active Substances in Daqing Oilfield Petroleum Sulfonate Samples by Liquid Chromatography

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Experimental program
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Effect test

Embodiment 1

[0050] (1) Preparation of standard solution: prepare standard solutions of sodium dodecylbenzenesulfonate and sodium 2-naphthalenesulfonate with a concentration of 500 mg / L in distilled water, and then mix them according to the weight ratio of 4.5:5.5 to obtain a concentration of 500 mg / L mg / L sodium dodecylbenzenesulfonate / sodium 2-naphthalenesulfonate mixed solution, as mother liquor. Dilute sequentially to prepare a series of solutions with concentrations of 400 mg / L, 300 mg / L, 200 mg / L, 100 mg / L, and 50 mg / L, respectively, as standard solutions for quantification.

[0051] (2) Draw a quantitative working curve: the chromatographic analysis conditions are as follows: mobile phase A 90% methanol, B 90% methanol (containing 0.2M acetic acid and 0.2M ammonium acetate), gradient elution, the gradient condition is 0~1min, 100 %A, 1.01min, 80%B, 1.01~3min, 80%B; flow rate 1.0mL / min; UV detector, detection wavelength 254nm; injection volume 20µL. Chromatographic analysis is perfo...

Embodiment 2

[0058] Except that the petroleum sulfonate sample to be tested (batch 2) was different, the rest of the steps were the same as in Example 1. Chromatography and extraction methods were used to test the content of active matter in the petroleum sulfonate sample, and the results are shown in Table 1.

Embodiment 3

[0060] Except that the petroleum sulfonate sample to be tested (batch 3) was different, the rest of the steps were the same as in Example 1. Chromatography and extraction methods were used to test the content of active matter in the petroleum sulfonate sample, and the results are shown in Table 1.

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Abstract

The invention discloses a method for determining the active substance content in a petroleum sulfonate sample in Daqing Oilfield by liquid chromatography. The mixed solution of sodium dodecylbenzenesulfonate and sodium 2-naphthalenesulfonate is used as a quantitative standard solution; The standard solution is analyzed and detected by liquid chromatography, and the quantitative working curve is drawn; the actual sample solution of petroleum sulfonate with a certain concentration is accurately prepared, and the chromatographic measurement is carried out. The concentration of the active substance in the actual sample of petroleum sulfonate can be obtained by simple conversion at last. The detection performance of the invention is stable, sensitive and rapid, and the analysis speed is fast. The test results have good repeatability and small quantitative error, and the deviation from the test results obtained by the extraction method is about 1%, which can fully satisfy the active substances in the petroleum sulfonate samples used in oilfield chemical flooding. The need for tracking and monitoring of component content and content changes.

Description

technical field [0001] The invention relates to a method for testing the content of active substances in oilfield petroleum sulfonate samples, in particular to a method for measuring the content of active substances in Daqing oilfield petroleum sulfonate samples by liquid chromatography, which belongs to the quality of oilfield chemical flooding surfactants Analyze the field of surveillance technology. Background technique [0002] Chemical flooding is an important method and means to greatly enhance oil recovery in the late stage of water flooding development, and petroleum sulfonate is the most widely used surfactant in chemical flooding. Due to the difference in structure, composition and synthesis process of petroleum sulfonate, there are large performance differences among different petroleum sulfonate samples. Due to the differences in the quality standards of petroleum sulfonate products formulated by different companies, the same product has different quality evalua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 王帅郭勇梁晓静王磊王立成李亦婧
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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