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Method for detecting hydrgenated tail-oil paraffin composition using near-infrared spectrum

A tail oil paraffin family and near-infrared spectroscopy technology, which is applied in the direction of color/spectral characteristic measurement, measuring devices, instruments, etc., can solve the problems of long time required and cannot meet the needs of production plants, and achieve small operating space and accurate testing Cost, sample test method fast results

Inactive Publication Date: 2008-12-17
YANGZI PETROCHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In order to achieve real-time optimization of ethylene production equipment, it is necessary to first realize the rapid analysis of the composition of the raw material group, and now the commonly used chromatography method takes at least 2-3 hours, especially for heavy raw materials, using chromatography-mass spectrometry analysis method, The time required is longer, which is far from meeting the requirements of the production plant, and it is urgent to find a more convenient and quick analysis method

Method used

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  • Method for detecting hydrgenated tail-oil paraffin composition using near-infrared spectrum
  • Method for detecting hydrgenated tail-oil paraffin composition using near-infrared spectrum
  • Method for detecting hydrgenated tail-oil paraffin composition using near-infrared spectrum

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Experimental program
Comparison scheme
Effect test

Embodiment

[0054] Step 1 collect modeling samples

[0055] 1.1 Collect samples to establish the model of paraffins in hydrogenated tail oil, see Table 1:

[0056] Determination mass fraction range of model I: (33.3~69.2)m%

[0057] 1.2 Collect samples to establish the n-paraffin model in hydrogenated tail oil, see Table 1:

[0058] Determination mass fraction range of Model II: (9.9~31.9)m%

[0059] 1.3 Collect samples to establish isoparaffin model in hydrogenated tail oil, see Table 1:

[0060] The measured mass fraction range of Model III: (23.4~34.7)m%

[0061] Table 1 Modeling sample, chemical value (m%), measured value (m%) and residual error table (m%)

[0062] chemical value

Model I

Model II

Model III

serial number

Chemical value Measured value Residual error

Chemical value Measured value Residual error

Chemical value Measured value Residual error

1#

2#

3#

4#

5#

6#

7#

8#

9#

10#

...

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Abstract

The invention relates to a method to test the constitution of hydrogenation tail oil paraffin group by near infrared optical spectrum. It builds up models of paraffin, alkane, and isoalkane by alkene cracking device, and aromatics reformer and oil refining hydrogenation unit. And the content of paraffin, alkane, and isoalkane would be calculated by using the models. It has the advantages of convenient, rapid and accurate.

Description

technical field [0001] The invention relates to using near-infrared spectroscopy to establish paraffin, normal paraffin and isoparaffin models for the hydrogenated tail oil of olefin cracking units, aromatics reforming units and oil refinery hydrogenation units, and use the built model to determine the hydrogenated tail oil paraffins , Normal alkanes and isoparaffins. Background technique: [0002] In order to achieve real-time optimization of ethylene production equipment, it is necessary to first realize the rapid analysis of the composition of the raw material group, and now the commonly used chromatography method takes at least 2-3 hours, especially for heavy raw materials, using chromatography-mass spectrometry analysis method, The time required is longer, which is far from meeting the requirements of the production plant, and it is urgent to find a more convenient and quick analysis method. [0003] Applying near-infrared spectroscopy technology to gradually establish...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/27G01N30/00
Inventor 杨素黄贤平杨苏平
Owner YANGZI PETROCHEM
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