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Method for measuring content of active matter in petroleum sulfonate sample of Daqing oil field through liquid chromatogram

A technology of petroleum sulfonate and liquid chromatography, which is applied in the field of quality analysis and monitoring of oilfield chemical flooding surfactants, can solve the problems of large solvent consumption, long analysis time, and certain deviations, and achieve stable detection performance and fast analysis speed , The effect of small quantitative error

Active Publication Date: 2019-03-08
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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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

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  • Method for measuring content of active matter in petroleum sulfonate sample of Daqing oil field through liquid chromatogram
  • Method for measuring content of active matter in petroleum sulfonate sample of Daqing oil field through liquid chromatogram
  • Method for measuring content of active matter in petroleum sulfonate sample of Daqing oil field through liquid chromatogram

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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 measuring content of an active matter in a petroleum sulfonate sample of a Daqing oil field through liquid chromatogram, the method uses a mixed solution of sodiumdodecyl benzene sulfonate and sodium 2-naphthalenesulfonate as a quantifying standard solution; the liquid chromatogram is used to analyze and detect the standard solution, a quantifying working curve is drawn; a practical sample solution of the petroleum sulfonate with certain concentration is accurately prepared, the chromatographic measurement is implemented, the corresponding concentration ofthe solution is obtained by substituting the area of the chromatographic peak into the corresponding quantifying working curve, and the result of the content result of the active matter in the practical petroleum sulfonate sample is obtained finally through the simple conversion. The method is stable in detection performance and is sensitive and fast, the analysis speed is high, the repeatabilityof the test result is good, the quantitative error is small, the deviation from the test result obtained through an extraction method is about 1%, and the requirements on tracking and monitoring thecontent of the active matter in the practical petroleum sulfonate sample used for chemical flooding of the oil field as well as the content change are met completely.

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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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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