Method for rapidly determining content of toluene insoluble substances in heavy oil

A technology for rapid determination of toluene insoluble matter, applied in the direction of material absorption weighing, test sample preparation, etc., can solve the problems of poor analysis data stability and long sample test cycle, so as to achieve smooth washing process and true and reliable measurement results , to solve the effect of time-consuming

Inactive Publication Date: 2020-04-14
SHAANXI YANCHANG PETROLEUM GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above technical problems, the object of the present invention is to provide a rapid determination method for the toluene insoluble content of heavy oil, to solve the problems of long sample test period and poor stability of analysis data during the test process, and has the advantages of simple operation and fast test speed. , good repeatability and high precision

Method used

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  • Method for rapidly determining content of toluene insoluble substances in heavy oil
  • Method for rapidly determining content of toluene insoluble substances in heavy oil
  • Method for rapidly determining content of toluene insoluble substances in heavy oil

Examples

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Effect test

Embodiment 1

[0049] Select a sample suspension bed hydrocracking tail oil with poor fluidity at room temperature, keep the temperature at 80°C and stir well, weigh 0.2g, 0.5g, 1.0g, 3.0g, 4.0g Put a series of samples in a beaker, add hot toluene according to the ratio of solvent to oil (volume of toluene: sample mass) of 30:1, after ultrasonication for 20 minutes, filter under reduced pressure through a 0.8um glass fiber filter membrane, and measure the toluene insoluble matter content.

[0050] Each group of tests was measured in parallel three times, and the measured results are shown in Table 1, and the test data required for calculating the toluene insoluble content by the formula are shown in Table 2. It is known from the measurement results that when the sample weight is 4.0g, the content of toluene insoluble matter is obviously high, the relative error is large, and the amount of hot solvent used for washing increases significantly; when the sample weight is 0.2g-3.0g, the content o...

Embodiment 2

[0052] Select the suspension bed hydrocracking tail oil of the sample in Example 1, keep the constant temperature at 80°C and fully stir evenly, weigh a series of samples with a mass of 0.2g, 0.5g, 1.0g, and 3.0g in a beaker, According to the ratio of agent to oil (volume of toluene: mass of sample) of 50:1, add hot toluene and sonicate for 20 minutes, then filter under reduced pressure through a 0.8um glass fiber filter membrane, and measure the content of toluene insolubles.

[0053] Each group of tests was measured in parallel three times, and the measured results are shown in Table 1, and the test data required for calculating the toluene insoluble content by the formula are shown in Table 2. Known by each group of toluene insoluble matter content measurement results, when the sample weight is 0.2g-3.0g, the toluene insoluble matter content range is 10.41%-10.51%, and the agent oil ratio in embodiment 1 is 30:1 and records toluene The content of insoluble matter is close, ...

Embodiment 3

[0055] Select the suspension bed hydrocracking tail oil of the sample in Example 1, keep the constant temperature at 80°C and fully stir evenly, weigh three groups of samples with a mass of 1.0g in a 100mL beaker, according to the solvent-oil ratio (toluene volume: test (sample mass) was 30:1, adding hot toluene at 75°C, hot toluene at 80°C, and hot toluene at 85°C. After ultrasonication for 20 minutes, filter under reduced pressure through a 0.8um glass fiber filter membrane to measure the content of toluene insolubles.

[0056] Each group of tests was measured in parallel three times, and the measured results are shown in Table 1, and the test data required for calculating the toluene insoluble content by the formula are shown in Table 2. It is known from the measurement results that the contents of toluene insolubles at a temperature of 75° C. to 85° C. are basically the same when the toluene is heated, and the relative errors are all less than 1.0%.

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Abstract

The invention relates to a method for rapidly determining the content of toluene insoluble substances in heavy oil. The method comprises the following steps: (1) preparing materials, namely keeping afilter material for testing constant weight for later use; (2) performing sample treatment: weighing a proper amount of a uniform sample, putting the sample into a clean beaker, adding a hot toluene solvent according to a certain solvent-oil ratio (solvent volume: sample mass), and carrying out ultrasonic treatment to completely dissolve and disperse the sample; (3) testing the sample, namely performing reduced-pressure suction filtration on the dissolved sample by using a solvent filter through a constant-weight glass fiber filter membrane, washing by using a hot toluene solvent until the filtrate is nearly colorless, and stopping suction filtration after insoluble substances on the glass fiber filter membrane are completely pumped; and (4) performing result calculation: drying the filtermembrane subjected to suction filtration to constant weight, and calculating to obtain the content of toluene insoluble substances in the sample. The method has the characteristics of simplicity andconvenience in operation, high testing speed, good repeatability and high precision.

Description

technical field [0001] The invention relates to the technical field of detection of toluene-insoluble content in heavy oil, in particular to a rapid determination method for toluene-insoluble content in heavy oil. Background technique [0002] Toluene insoluble matter refers to the toluene insoluble components in petroleum products, which is a mixture mainly composed of carbonaceous, mineral particles and a small amount of inorganic substances. In recent years, the heavy oil hydrotreating process has developed rapidly, and the suspension bed hydrogenation technology has made a breakthrough. However, the lightening of heavy oil is carried out under high temperature and high pressure, and a large amount of coking and agglomeration will occur during the process, which affects One of the factors of its coking and agglomeration is the existence of toluene insoluble matter. The content of toluene insolubles determines the reaction performance of heavy oil hydrogenation. The measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02G01N1/38
CPCG01N1/38G01N5/02
Inventor 赵丽信高亚男陈黎翰姬鹏军杨猛田东阳赵静张生娟党昱
Owner SHAANXI YANCHANG PETROLEUM GRP
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