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Process for synthesizing molybdenum disulfide

A technology of molybdenum disulfide and sulfide, applied in the direction of molybdenum sulfide, etc., can solve the problem that molybdenum disulfide is not found

Inactive Publication Date: 2006-09-27
李恩杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, molybdenite or ammonium molybdate is usually used as raw material to produce molybdenum trioxide or its semi-finished products, and there is no relevant report on the production of molybdenum disulfide directly from molybdates, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] First, weigh the molybdate and sulfur in a weight ratio of 1:1.2, mix them evenly and put them into the crucible respectively, and then send the crucible into the nitrogen protection furnace. Vulcanize at low temperature for 20 to 26 hours to remove the oxygen element in the mixed material; then add sulfur powder with twice the weight to the sulfide after the first vulcanization and mix evenly, wait for the temperature to drop again Put it into the crucible, then send it to the nitrogen protection furnace for the second vulcanization, and raise the temperature of the second vulcanization to 400°C for 36 hours, and then raise the temperature to 800°C to crystallize the sulfide. After the sulfide is crystallized, the material is taken out, and after sorting, it is pulverized into powder by jet milling, which is the finished product.

Embodiment 2

[0016] First molybdate and sulfur are weighed in a ratio of 1: 3 by weight, and the first vulcanization is completed in the manner of Example 1, but its vulcanization temperature is 500 ° C, and the vulcanization time is 24 hours; then In the sulfide after the first vulcanization, add the sulfur powder whose weight is 6 times and complete the second vulcanization according to the method of Example 1, and keep the temperature of the second vulcanization for 30 hours at 1200 ° C, then Raise the temperature to 1400°C to crystallize the sulfide. When the sulfide crystallizes, take out the material, and after sorting, use jet milling to pulverize it into powder, which is the finished product.

Embodiment 3

[0018] First molybdate and sulfur are weighed in a ratio of 1: 2 by weight, and the first vulcanization is completed in the manner of Example 1, but its vulcanization temperature is 600 ° C, and the vulcanization time is 24 hours; then After the first vulcanized sulfide, add the sulfur powder whose weight is 3 times and complete the second vulcanization according to the method of Example 1, and keep the temperature of the second vulcanization at 1000°C for 36 hours, then Raise the temperature to 1200°C to crystallize the sulfide. When the sulfide crystallizes, take out the material, and after sorting, use jet milling to pulverize it into powder, which is the finished product.

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PUM

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Abstract

The invention refers to a synthetic method about molybdenum disulfide; this invention contains completing the first sulfuration of molybdate and sulfur mixture in high temperature atmosphere, after adding sulfur in sulfide of first vulcanized and mixing sufficiently, completing the second vulcanize in high temperature atmosphere, taking out after the crystal shaped, finishing the molybdenum disulfide after hopper feedback and disintegration. The preparing molybdenum disulfide of method examine by specialized division: the content of molybdenum disulfide is more than 99.5%, silica dioxide and iron are 0.02% and0.04%, but the making cost is much lower than the synthetical method of technique in existence.

Description

Technical field: [0001] The invention relates to a technique for producing molybdenum disulfide by a synthetic method. Background technique: [0002] Molybdenum disulfide is a solid lubricant with excellent high temperature resistance, compression resistance and stable chemical properties. It is widely used in mechanical equipment in aviation, aerospace, metallurgy, chemical and other fields. Although the chemical properties of molybdenum disulfide are relatively stable, because molybdenum disulfide often exists in the form of molybdenite in nature, its purity cannot meet the standards required as a lubricant. In the prior art, two methods of molybdenite purification and synthesis are usually used to produce molybdenum disulfide. Although the molybdenite purification method has a low production cost, the main problem of using this method is that the surrounding environment is polluted, the equipment is corroded seriously, and the purity of the molybdenum disulfide produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06
Inventor 高玉彬栾文焕李恩杰
Owner 李恩杰