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Method for rapidly dissolving lithium-based lubricating grease

A lithium-based grease, fast technology, used in the field of chemistry, can solve problems such as inability to dissolve completely, environmental acid pollution, etc.

Active Publication Date: 2020-07-03
GUANGZHOU MECHANICAL ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, sulfuric acid, nitric acid, and hydrochloric acid are precursor reagents, and their purchase and use must be strictly controlled by the Public Security Bureau. Extensive use will cause acid pollution to the environment
Some lithium-based greases will also produce insoluble matter visible to the naked eye after microwave digestion, resulting in incomplete dissolution

Method used

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  • Method for rapidly dissolving lithium-based lubricating grease
  • Method for rapidly dissolving lithium-based lubricating grease
  • Method for rapidly dissolving lithium-based lubricating grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Use an analytical balance to accurately weigh 0.5 g of lithium-based grease into a glass test tube with a cover.

[0074] (2) Accurately weigh 4g of 120# solvent gasoline into the above-mentioned glass test tube.

[0075] (3) Use a stirrer to stir the 120# solvent gasoline and lithium-based grease in the glass test tube evenly, and then let it stand for 10 minutes. The result is as follows: figure 2 and shown in Table 1.

[0076] (4) Suspension appears in the glass test tube after standing still (insoluble in the metal carboxyl end of 120# solvent gasoline), then add acetic acid (0.5g) with the same quality as lithium-based grease to the glass test tube, and use a mixer to mix Uniform for 1 minute, the suspended matter gradually dissolves and disappears, such as image 3 And as shown in Table 2.

[0077] (5) After the glass test tube was left to stand for 5 minutes, observe whether there is any suspended matter precipitation, and the result is that there is no s...

Embodiment 2

[0079] (1) Use an analytical balance to accurately weigh 0.5 g of lithium-based grease into a glass test tube with a cover.

[0080] (2) Accurately weigh 4 g of aviation kerosene into the above-mentioned glass test tube.

[0081] (3) Use a stirrer to stir the aviation kerosene and lithium-based grease in the glass test tube evenly, and then let it stand for 10 minutes. The results are as follows: Figure 4 and shown in Table 1.

[0082] (4) Suspension appears in the glass test tube after standing (insoluble in the metal carboxyl end of aviation kerosene), then add acetic acid (0.5g) with the same quality as lithium-based grease to the glass test tube, and use a mixer to mix for 1 Minutes, the suspended matter gradually dissolves and disappears, such as Figure 5 And as shown in Table 2.

[0083] (5) After the glass test tube was left standing for 5 minutes, it was observed whether there was suspended matter precipitation, and the result was that there was no suspended matte...

Embodiment 3

[0085] (1) Use an analytical balance to accurately weigh 0.5 g of lithium-based grease into a glass test tube with a cover.

[0086] (2) Accurately weigh 4 g of toluene into the above-mentioned glass test tube.

[0087] (3) Use a stirrer to stir the toluene and lithium-based grease in the glass test tube evenly, and then let it stand for 10 minutes. The result is as follows: Image 6 and shown in Table 1.

[0088] (4) Suspension appears in the glass test tube after standing still (metal carboxyl end insoluble in toluene), then add acetic acid (0.5g) of the same quality as lithium-based grease to the glass test tube, and mix for 1 minute with a mixer , the suspended matter gradually dissolves and disappears, such as Figure 7 And as shown in Table 2.

[0089] (5) After the glass test tube was left to stand for 5 minutes, observe whether there is suspended matter to separate out, and the result is no suspended matter to separate out, indicating that toluene has dissolved the ...

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Abstract

The invention discloses a method for rapidly dissolving lithium-based lubricating grease, and belongs to the field of chemistry. The method comprises the steps of carrying out first dissolution on anexternal alkyl terminal of a soap-based thickening agent in the lithium-based lubricating grease, and then carrying out second dissolution on an internal carboxyl terminal of the soap-based thickeningagent. The method is simple, convenient, quick, practical and efficient, not only can improve the dissolving speed of the lithium-based lubricating grease and improve the pretreatment efficiency of asample, but also can reduce the use of strong acid, so that the corrosion condition of detection equipment is reduced, and the conditions of toxic gas and acid pollution are reduced.

Description

technical field [0001] The invention relates to the technical field of chemistry, in particular to a method for rapidly dissolving lithium-based grease. Background technique [0002] At present, the dissolving method of lithium-based grease is usually sulfate ashing using a muffle furnace or microwave digestion using various inorganic acids such as sulfuric acid, nitric acid, hydrochloric acid, and hydrofluoric acid. [0003] Among them, during sulfate ashing, combustion can cause the loss of certain elements such as volatilization of sulfur. The digestion is too complicated, time-consuming and dangerous. The aqueous solution after strong acid digestion will corrode important parts of the detection equipment and cause equipment damage. Moreover, the high-frequency radiation generated by microwave digestion requires safety measures, and the digestion will produce toxic hydroxide, hydrogen fluoride, hydrogen sulfide and other gases. In addition, sulfuric acid, nitric acid, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/40
CPCG01N1/4055
Inventor 贺石中王永安庞晋山丘晖饶张琳颖邓新张静茹朱懋冠谢静周娜
Owner GUANGZHOU MECHANICAL ENG RES INST