Method for testing oil oxidation stability

A technology of oxidation stability and test method, which is applied in the direction of material inspection products, etc., can solve the problems of inability to continuously sample, the cleaning and dispersibility has not been tested, and the test method of oil oxidation stability is inconvenient, so as to achieve the effect of comprehensive testing.

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The above method cannot take samples continuously, and monitor the change of oil performance with the test time
Especially in the development stage of new oil products or new standards, the end time of the test cannot be adjusted arbitrarily according to the results of the intermediate test
At the same time, the above method only evaluates the oxidation stability of the oil, and does not test the detergency and dispersibility closely related to it.
[0005] It can be seen that the above-mentioned existing oil oxidation stability test method has inconvenience and defects, and needs to be further improved urgently.

Method used

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  • Method for testing oil oxidation stability
  • Method for testing oil oxidation stability
  • Method for testing oil oxidation stability

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Embodiment 1, evaluate oil performance:

[0017] 1. Comparing the oxidation resistance and detergency and dispersibility of commercially available oil A and commercially available oil B

[0018] In order to compare the use of oil A and oil B with similar performance, the above method is adopted, and the test conditions are set as follows. The test temperature is 150°C, the air flow rate is 10L / h, 2.5g iron wire is added as a catalyst, and samples are taken and analyzed every 12 hours.

[0019] The test result of table 1 oil product A

[0020]

[0021] Table 2 Test results of oil product B

[0022]

[0023] It can be seen from the above test that before 48 hours, the test results of the two oil products are similar. Beginning at 48 hours, the performance of the two oils showed a difference. The anti-oxidation performance of sample B is better than that of sample A. After 60 hours, the test is completed, and the cleaning and dispersibility of sample B is also be...

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Abstract

The invention relates to a method for testing oil oxidation stability. The method comprises the following steps of: supplying an oil processing device which comprises a thermostatic container and an oil container, wherein the oil container is arranged in the thermostatic container and is provided with an air intake pipe and an air outlet pipe; feeding the tested oil and a metal catalyst into the oil container; introducing air into the tested oil via the air intake pipe, wherein the flow of the air is 1 L/H to 20 L/H; measuring the temperature of the tested oil, orderly extracting samples from the tested oil according to a predetermined time sequence after the temperature of the tested oil is up to a set value, and measuring the viscosity, the acid value, the oxidation value and the nitration value of each sample; and measuring the content of an insoluble substance (n-pentane) of the remained oil in the oil container. Through the method, the samples can be sampled by many times during the testing process, so that a performance change trend of the oil is obtained; and the detergent dispersibility and the thermal oxidation stability of the oil can be evaluated.

Description

technical field [0001] The invention relates to a test method for oxidation stability, in particular to a test method which can take multiple samples and simultaneously evaluate the clean dispersibility and thermal oxidation stability of oil products. Background technique [0002] The ability of petroleum products to resist permanent changes in their properties due to the action of air (or oxygen) is called the oxidation stability of oil products. This project is one of the quality indicators that must be controlled for lubricating oil products. It is more important for long-term cycle use of steam turbine oil, transformer oil, internal combustion engine oil, and air compressor oil that is in contact with a large amount of compressed air. [0003] There are many methods for measuring the oxidation stability of lubricating oil in the current technology, and the principles are basically the same. Generally, oxygen is directly introduced into the sample or purified dry air. Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/28
Inventor 朱和菊夏鹏周佩讯隋秀华赵智军
Owner CHINA PETROLEUM & CHEM CORP
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