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A Method for Detecting Precipitation Tendency of Lubricating Oil

A lubricating oil and tendentious technology, applied in the field of lubricating oil, can solve the problems of subjective judgment differences, long time, etc., and achieve the effect of time saving and accurate detection

Active Publication Date: 2019-10-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This observation method is mainly to see with the naked eye. On the one hand, it takes a long time. On the other hand, the results of observation and judgment vary from person to person, and there are differences in subjective judgments of different people.

Method used

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  • A Method for Detecting Precipitation Tendency of Lubricating Oil
  • A Method for Detecting Precipitation Tendency of Lubricating Oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Prepare different base oil compositions according to the additives used in the current production formula, and test the difference in light transmittance of different base oil compositions at high and low temperatures.

[0024] The specific steps are:

[0025] (1) Store the colorimetric cell containing the lubricating oil to be tested at a constant temperature of 50°C for 24 hours, and use a spectrophotometer to quickly detect the light transmittance of the lubricating oil to be tested at a wavelength of 720nm;

[0026] (2) Store the colorimetric cell containing the lubricating oil to be tested at a constant temperature at 5°C for 24 hours, and use a spectrophotometer to quickly detect the light transmittance of the lubricating oil to be tested at a wavelength of 720nm;

[0027] (3) Calculate the difference in light transmittance of the lubricating oil obtained in steps (1) and (2), and judge the sedimentation tendency of the lubricating oil by the size of the differenc...

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Abstract

The invention relates to a method for detecting tendency of precipitation of lubricating oil. The method comprises (1) detecting light transmittance of lubricating oil at a high temperature, (2) detecting light transmittance of the lubricating oil at a low temperature, and (3) calculating the difference of the light transmittances of the lubricating oil at the high temperature and the low temperature, and judging the precipitation tendency of the lubricating oil by the difference. The method can greatly save the time to judge the precipitation tendency of the lubricating oil and the test result is consistent with the result obtained by the conventional method.

Description

technical field [0001] The invention relates to the field of lubricating oil, in particular to a method for detecting the precipitation tendency of lubricating oil. Background technique [0002] Lubricating oil precipitation has always been a concern of consumers, and it is also a key concern in lubricating oil production. At present, when the lubricating oil industry detects the tendency of lubricating oil to settle, the usual method is to put the lubricating oil in a transparent container, let it stand at room temperature, and observe with human eyes whether there is sediment in the oil or at the bottom of the container. Usually to observe the precipitation of oil products, it is necessary to store the oil products for a long time, usually 6 to 12 months. From the information of foreign additive companies, for example, the laboratory of a well-known company also stores oil products at different temperatures. Visual inspection Changes in the appearance of the oil. This me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/59
Inventor 周干堂李万英崔海鸥水琳夏鹏
Owner CHINA PETROLEUM & CHEM CORP