Method for rapidly detecting quinoline insoluble substances in asphalt

A detection method and quinoline technology, which are used in measurement devices, suspension and porous material analysis, individual particle analysis, etc. Problems such as too much linoleum insoluble matter

Inactive Publication Date: 2019-12-13
BEIJING RISUN TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yet this method still has following problem: 1) this method can't realize the real-time detection to product in industrial production, still needs to get sample from assembly line earlier, detects again; 2) if the content of quinoline insoluble matter is higher or sampling is relatively If there are too many quinoline insolubles remaining on the filter, the whiteness (L value) cannot well reflect the true concentration of quinoline insolubles
[0005] Therefore, the existing analysis methods require testers to enter the production device to take samples back to the laboratory for analysis. During the sampling process, the properties of the samples will change, resulting in errors in measurement data.

Method used

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  • Method for rapidly detecting quinoline insoluble substances in asphalt
  • Method for rapidly detecting quinoline insoluble substances in asphalt
  • Method for rapidly detecting quinoline insoluble substances in asphalt

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: the detection of quinoline insoluble matter concentration

[0028] 1) The establishment of the standard curve of quinoline insolubles in asphalt:

[0029] According to GB / T2293-2008, 8 asphalt samples with quinoline insoluble content between 0.001% and 0.1% were analyzed and tested, and the data of 8 quinoline insolubles were obtained respectively. Add quinoline solvent to these 8 asphalt samples according to the volume ratio of 10 times. The quinoline solvent contains 0.1mol / l tetramethylammonium chloride, mix evenly by stirring paddle, and the mixer is maintained by electric heating At 130°C, add a part of the mixed solution into the measurement pool, and select the test channel of 1-100um through the Beckman Coulter Multisizer3 particle / cell counting and particle size analyzer, and give the number of particles per unit volume (10-500ml) , the sample of each concentration is tested 3 times, and the repeatability is not more than 0.6%. According to the a...

Embodiment 2

[0031] Embodiment 2: the detection of quinoline insoluble matter concentration

[0032] 1) The establishment of the standard curve of quinoline insolubles in asphalt:

[0033] According to GB / T2293-2008, 7 asphalt samples with quinoline insoluble content between 0.1wt% and 5wt% were analyzed and tested, and the data of 7 quinoline insolubles were obtained respectively. These 7 asphalt samples are added into quinoline solvent according to the volume ratio of 100 times. The quinoline solvent contains 0.1mol / l tetramethylammonium chloride. They are mixed evenly by stirring paddles, and the mixer is maintained at At 130°C, add a part of the mixed solution into the measurement pool, and select the test channel of 1-100um through the Beckman Coulter Multisizer 3 particle / cell counting and particle size analyzer, and give the number of particles per unit volume (10-500ml) , the sample of each concentration is tested 3 times, and the repeatability is not more than 0.6%. According to ...

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Abstract

The invention discloses an online rapid detection method for the concentration of quinoline insoluble substances contained in asphalt. The method comprises the following steps: 1) establishing a standard curve of quinoline insoluble substances (QI) in asphalt; 2) extracting an asphalt sample on line in needle coke production process, and blending; and 3) measuring and detecting the sample obtainedin the step 2) by using a particle detector, and calculating the concentration of the quinoline insoluble in the material through the standard curve in the step 1). According to the detection methoddisclosed by the invention, the measurement can be quickly completed, the measurement time is shortened from 4 hours to less than 30 minutes, and meanwhile, the accuracy of a concentration measurementresult can be ensured.

Description

technical field [0001] The invention belongs to the technical field of industrial detection, and in particular relates to an online rapid detection method for the concentration of quinoline insoluble matter contained in asphalt. Background technique [0002] Pitch is the basic raw material for producing various carbon materials in industry, especially high value-added carbon materials and needle coke. However, the solvent-insoluble matter in pitch, especially the quinoline insoluble matter, has a great influence on the production and performance of the product, for example, it is an important factor controlling the product quality of needle coke (eg, crystal growth and anisotropy). Therefore, strict control is required. In the prior art, the determination of quinoline insolubles is usually carried out quantitatively according to GB / T2293-2008. However, this method has disadvantages in complicated operation and long analysis time up to 4 hours. The concentration change of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06G01N15/12
CPCG01N15/06G01N15/12
Inventor 庞伟伟党伟荣杜彭立陈西波刘哲
Owner BEIJING RISUN TECH CO LTD
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