Method for testing closed-cup flash point of water-containing lubricating oil

A water-containing lubricating oil, closed flash point technology, applied in the direction of material flash point, etc., can solve the problems affecting the timeliness of flash point test, low efficiency, long water removal time, etc., to achieve improved measurement efficiency, good technical effect, and reduced dosage. Effect

Inactive Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has long water removal time and low efficiency, which affects the timeliness of the flash point test, and provides a new method for measuring the closed flash point of lubricating oil containing water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 11.4 grams of aqueous lubricating oil was contacted once with 4.6 grams of desiccant layer. In water-containing lubricating oil, the water content is 1%, the desiccant is calcium chloride, and the water removal efficiency is 0.00153 minutes -1 . After one operation, the water content was 0.072%.

[0014] Repeat the above steps once, the water content is 0.029%, which meets the requirements. The total time is 30 minutes. Send the dehydrated lubricating oil to the setaflash automatic micro-closed flash point tester (82000-0) to test the flash point.

Embodiment 2～4

[0016] The operation is the same as in [Example 1]. The desiccant used and the water removal efficiency are shown in Table 1.

[0017] Table 1

[0018] Example desiccant Water removal efficiency, minutes -1 water content Operations total time, minutes 2 Anhydrous Magnesium Chloride 0.000475 0.12% 1 30 3 4 A molecular sieve 0.000865 0.04% 1 17 4 Anhydrous Sodium Sulfate 0.00126 0.01% 1 12

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PUM

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Abstract

The invention relates to a method for testing a closed-cup flash point of water-containing lubricating oil, which mainly solves the technical problems of long water removal time, low efficiency and influence on flash point testing timeliness in the prior art. The method comprises the following steps: (a) enabling the water-containing lubricating oil with the water content being 0.5%-8% by weight to be in full contact with a dryer, wherein the water removal efficiency is 0.0001-0.001min<-1> and refers to the weight of the water-containing lubricating oil passing through the unit weight of the dryer within a unit time; and (b) enabling the lubricating oil after water removal to enter a flash point test instrument for flash point testing. According to the technical scheme for flash point testing, the method well solves the problems and can be used for testing the closed-cup flash point of the water-containing lubricating oil during industry practice.

Description

technical field [0001] The invention relates to a method for measuring the closed flash point of lubricating oil containing water. Background technique [0002] At present, the method for measuring the closed flash point of lubricating oil in use is the Pensky-Martin closed cup method according to GB / T 261-2008 Determination of Flash Point. Among them, water removal is required when some residual fuel oils and free water in lubricants cannot be separated. The micro-volume closed-mouth flash point tester uses a small amount of sample, only 4 ml. If there is water in the oil sample (moisture content is greater than 0.15%), the water will be vaporized first after heating to produce a large amount of foam overflow, resulting in misjudgment of the flash point measurement. [0003] The method generally used at present is to put enough calcium chloride into the lubricating oil to be tested, stir and stand still for a long time, then take the upper layer of oil to measure the flash...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/52
Inventor 章仁毅傅继瑜羊丽君张智君陈瑜雯
Owner CHINA PETROLEUM & CHEM CORP
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