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Infrared spectrum detection method for performance of rolling lubricating oil

A detection method, infrared spectroscopy technology, applied in the direction of color/spectral characteristic measurement, measuring device, material analysis through optical means, etc., can solve the problems of time-consuming, many reagents, and the change of process parameters cannot be fed back in time, and achieve operation The effect of reduced complexity and high accuracy

Inactive Publication Date: 2017-12-15
SHANDONG NANSHAN ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, each production enterprise is based on the chemical characteristics of acids, alcohols, and esters, referring to the national standard for the determination of the acid value of petroleum products (GB264), the determination of the hydroxyl value of non-ionic surfactant polyethoxylated derivatives (GB / T7384) and petroleum Determination of product saponification value (GB / T8021) These three methods determine the numerical value of acid value, hydroxyl value and saponification value in process lubricating oil to determine the content of acid, alcohol and ester, but this chemical analysis in the prior art Disadvantages of the method: 1. More reagents are required, and toxic reagents such as pyridine and acetic anhydride are required, which will cause great harm to the body of the testing personnel
2. It takes a long time to feed back the changes of process parameters in the production process of the enterprise in time, and there is a lag

Method used

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  • Infrared spectrum detection method for performance of rolling lubricating oil
  • Infrared spectrum detection method for performance of rolling lubricating oil
  • Infrared spectrum detection method for performance of rolling lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Selection of Calibration Spectrum

[0038] According to the characteristics of lubricating oil in the cold rolling process, configure reasonable calibration data points, and establish a standard working curve. The specific performance data of each sample is shown in Table 1 below:

[0039] Table 1 The component values ​​of each sample in the calibration spectrum

[0040]

[0041] 2. Define the peak position of the spectrum

[0042] Use optical attenuator as compensation, record oil sample at 1043cm -1 ~1067cm -1 The infrared spectrum of the interval, the baseline method calculates the C-O stretching vibration absorption band of alcohols in the sample at 1057cm -1 Absorbance intensity at ; recorded at 1720cm -1 ~1770cm -1 The infrared spectrum of the interval, the baseline method calculates the ester stretching vibration absorption band in the sample at 1748cm -1 Absorbance intensity at ; recorded at 1705cm -1 ~1716cm -1The infrared spectrum of the interval...

Embodiment 2

[0061] Adopt the FTIR method of the embodiment of the present invention 1 and the chemical analysis method of prior art (acid value determination method (GB264), nonionic surfactant polyethoxylated derivative hydroxyl value determination (GB / T7384) and petroleum product saponification Value determination method (GB / T8021) these three kinds of methods), by detecting the rolling lubricating oil that alcohol content is 1wt%, the relative error between FTIR method and the chemical analysis method of prior art is below 3%.

Embodiment 3

[0063] Adopt the FTIR method of the embodiment of the present invention 1 and the chemical analysis method of prior art (acid value determination method (GB264), nonionic surfactant polyethoxylated derivative hydroxyl value determination (GB / T7384) and petroleum product saponification Value determination method (GB / T8021) these three methods), by detecting the rolling lubricating oil that alcohol content is 10wt%, the relative error between FTIR method and the chemical analysis method of prior art is below 3%.

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Abstract

The invention provides an infrared spectrum detection method for performance of rolling lubricating oil. The infrared spectrum detection method comprises the following steps: (A) performing infrared spectrum analysis on a rolling lubricating oil standard sample, and recording peak intensity of alcohols, esters and acids of the sample; (B) by taking the peak intensity as a transverse coordinate and the content of components of the rolling lubricating oil as a longitudinal coordinate, performing linear fitting by using a least square method so as to obtain fitting linear regression equations of alcohol contents, acid contents, ester contents, hydroxyl values, acid values and saponification values, and performing performance detection. The infrared spectrum detection method for performance of the rolling lubricating oil, which is provided by the invention, has the advantages of convenience and rapidness that a conventional chemical analysis method does not have, in addition, the method needs no chemical reagent, the operation tediousness is remarkably reduced, related parameters of performance of the rolling lubricating oil can be tested by implementing the infrared spectrum detection method once, and thus the method is very applicable to wide popularization and application and is very worthy of use reference.

Description

technical field [0001] The invention relates to the field of lubricating oil performance detection, in particular to an infrared spectrum detection method for lubricating oil performance. Background technique [0002] In the cold rolling process of aluminum and aluminum alloy, aluminum and iron have strong adhesion, and the rolling process of aluminum is easy to bond with the roll. Therefore, appropriate rolling oil can be used as a lubricant to improve the surface quality of aluminum. Among them, the content of alcohol, acid and ester in rolling lubricating oil has a direct impact on the production process of aluminum strip cold rolling and the stability of product quality. Accurately monitoring the change of additive content in process lubricating oil is an important part of process monitoring in the production process. . [0003] Cold rolling lubricating oil is mainly composed of light mineral oil and additives, in which the base oil is composed of saturated alkanes and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3577G01N21/35G01N21/31
CPCG01N21/31G01N21/35G01N21/3577G01N2021/3129G01N2021/3196G01N2021/3595G01N2201/13
Inventor 程仁策隋信栋顾华锋于宏吕洋霍艳
Owner SHANDONG NANSHAN ALUMINUM
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