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Method for determining content of tert-butyl peroxide in diesel oil by infrared spectroscopy

A technology of tert-butyl ether peroxide and infrared spectroscopy, applied in the field of chemical analysis, can solve the problems of complex diesel matrix, inability to gasify diesel components, and easy decomposition of organic peroxides at high temperature.

Inactive Publication Date: 2019-02-19
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, for tert-butyl peroxide, the iodometric method is still used for quantification, which is time-consuming and solvent-consuming; there are reports that organic peroxides are analyzed by gas chromatography, but organic peroxides are easy to decompose at high temperatures, and the quantitative results are reproducible. poor sex
In addition, the matrix of diesel oil is complex. In order not to cause the decomposition of peroxide, low temperature is selected, which will easily cause the diesel components to fail to gasify, causing pollution to the injection port, chromatographic column, and detector.

Method used

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  • Method for determining content of tert-butyl peroxide in diesel oil by infrared spectroscopy
  • Method for determining content of tert-butyl peroxide in diesel oil by infrared spectroscopy
  • Method for determining content of tert-butyl peroxide in diesel oil by infrared spectroscopy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Experimental instruments and reagents

[0043] (1) Experimental instrument: Bruker Fourier transform infrared spectrometer.

[0044] (2) Experimental reagents: standard tert-butyl peroxide (≥99.0%), blank diesel oil (without tert-butyl peroxide).

[0045] (2) Parameter setting of infrared spectrometer

[0046] Spectral range: 600cm -1 ~4000cm -1 ;Background scan time: 16scans; Sample scan time: 16scans; Resolution: 4cm -1 ;Scanning speed: 10KHz; Optical path of liquid pool: 0.5mm.

[0047] (3) Drawing of standard curve

[0048] Reset the tert-butyl peroxide scale used for calibration in a 10mL volumetric flask, dilute with blank diesel oil (without tert-butyl peroxide) and constant volume, and prepare 0.10g / L, 0.25g / L, 0.75g / L, 1.5g / L, 5g / L, 8g / L standard solutions of six different concentrations of tert-butyl peroxide. Adopt above-mentioned instrument condition to measure, find out a characteristic absorption peak 1191.86cm from the infrared spectrogram of ...

Embodiment 2

[0052] (1) Experimental instruments and reagents

[0053] (1) Experimental instrument: Bruker Fourier transform infrared spectrometer.

[0054] (2) Experimental reagents: standard tert-butyl peroxide (≥99.0%), blank diesel oil (without tert-butyl peroxide).

[0055] (2) Parameter setting of infrared spectrometer

[0056] Spectral range: 600cm -1 ~4000cm -1 ;Background scan time: 16scans; Sample scan time: 16scans; Resolution: 4cm -1 ;Scanning speed: 10KHz; Optical path of liquid pool: 0.5mm.

[0057] (3) Drawing of standard curve

[0058] Reset the tert-butyl peroxide scale used for calibration in a 10mL volumetric flask, dilute with blank diesel oil (without tert-butyl peroxide) and constant volume, and prepare 0.10g / L, 0.25g / L, 0.75g / L, 1.5g / L, 5g / L, 8g / L standard solutions of six different concentrations of tert-butyl peroxide. Adopt above-mentioned instrument condition to measure, find out a characteristic absorption peak 1191.86cm from the infrared spectrogram of ...

Embodiment 3

[0062] (1) Experimental instruments and reagents

[0063] (1) Experimental instrument: Bruker Fourier transform infrared spectrometer.

[0064] (2) Experimental reagents: standard tert-butyl peroxide (≥99.0%), blank diesel oil (without tert-butyl peroxide).

[0065] (2) Parameter setting of infrared spectrometer

[0066] Spectral range: 600cm -1 ~4000cm -1 ;Background scan time: 16scans; Sample scan time: 16scans; Resolution: 4cm -1 ;Scanning speed: 10KHz; Optical path of liquid pool: 0.5mm.

[0067] (3) Drawing of standard curve

[0068] Reset the tert-butyl peroxide scale used for calibration in a 10mL volumetric flask, dilute with blank diesel oil (without tert-butyl peroxide) and constant volume, and prepare 0.10g / L, 0.25g / L, 0.75g / L, 1.5g / L, 5g / L, 8g / L standard solutions of six different concentrations of tert-butyl peroxide. Adopt above-mentioned instrument condition to measure, find out a characteristic absorption peak 1191.86cm from the infrared spectrogram of ...

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Abstract

The invention provides a method for determining the content of tert-butyl peroxide in diesel oil by infrared spectroscopy. The invention overcomes the defects that an iodometric method is time-consuming and wastes solvents; the determination of tert-butyl peroxide by gas chromatography requires harsh temperature conditions to prevent decomposition; and a low temperature causes the diesel to fail to vaporize thereby contaminating an inlet, a column, and a detector, and resulting in poor reproducibility of the tert-butyl peroxide content determination. The method can conveniently accurately determine the content of tert-butyl peroxide in diesel oil.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to a method for measuring the content of tert-butyl peroxyether in diesel oil by infrared spectroscopy. Background technique [0002] Cetane number is an important index of diesel combustion performance, and has certain influence on engine cold start, emission and combustion noise. National standards also have strict requirements on the cetane number of diesel. In order to increase the cetane number of diesel, in addition to adopting reasonable processing technology, adding a certain amount of additives to diesel can also improve the quality of diesel to varying degrees. [0003] Tert-butyl peroxide is a clean and efficient peroxide type cetane number improver compared with the traditional cetane number improver alkyl nitrate. Its addition avoids the use of nitrating agents such as nitric acid, or a mixture of sulfuric acid and nitric acid in the production p...

Claims

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Application Information

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IPC IPC(8): G01N21/3577
CPCG01N21/3577
Inventor 吕印美马韵升王岳华赵红波贾莎莎任丽艳韩立霞李霞崔丽华
Owner CHAMBROAD CHEM IND RES INST CO LTD
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