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Process for producing power shaped phosphorus pentasulfide

A phosphorus pentasulfide, powder technology is applied in the field of preparation of powder phosphorus pentasulfide, which can solve the problems of skin irritation, environmental pollution, combustion, etc., and achieve the effects of avoiding dust, protecting the environment, and ensuring production safety.

Inactive Publication Date: 2009-04-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, powdery phosphorus pentasulfide products are mainly obtained by dry grinding, that is, flake phosphorus pentasulfide is directly placed in the grinding equipment for grinding to obtain powder products. This method will generate a lot of dust. The skin is irritating, so this method not only pollutes the environment, but also endangers the health of operators; at the same time, due to the risk of burning due to friction and impact of phosphorus pentasulfide, direct grinding by dry method is also dangerous.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Add 2.0 kg of carbon tetrachloride and 1.0 kg of flaky phosphorus pentasulfide into a ball mill connected to the atmosphere, grind for 0.5 hours at room temperature, vacuum filter, then vacuum dry at 40°C to remove and filter and leave in the material A powdery phosphorus pentasulfide sample was obtained after using an inert solvent. The sample was analyzed, and all the powdered phosphorus pentasulfide passed 120 mesh, and the yield of phosphorus pentasulfide was 99.5%.

Embodiment 2

[0009] Example 2: Add 4.5 kg of carbon tetrachloride and 1.0 kg of flaky phosphorus pentasulfide into a ball mill connected to the atmosphere, grind for 2.0 hours at room temperature, vacuum filter, then vacuum dry at 30°C to remove and filter and leave in the material A powdery phosphorus pentasulfide sample was obtained after using an inert solvent. The sample was analyzed, and all the powdered phosphorus pentasulfide passed 200 mesh, and the yield of phosphorus pentasulfide was 99.2%.

Embodiment 3

[0010] Example 3: Add 3.0 kg of cyclohexane and 1.0 kg of flaky phosphorus pentasulfide into a ball mill connected to the atmosphere, grind for 1.0 hour at room temperature, vacuum filter, then vacuum dry at 50°C to remove the residue in the material after filtration Inert solvent was used to obtain powdery phosphorus pentasulfide samples. The sample was analyzed, and all the powdered phosphorus pentasulfide passed 160 meshes, and the yield of phosphorus pentasulfide was 99%.

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Abstract

The invention relates to a method for preparing powdery phosphorus pentasulfide, belongs to the field of preparing a fine phosphorus chemical product in chemical industry, and in particular relates to a method for preparing powdery phosphorus pentasulfide by sheet phosphorus pentasulfide. The method comprises the following steps: the sheet phosphorus pentasulfide is put into grinding equipment and is ground under the protection of an inert solvent; and the phosphorus pentasulfide and the inert solvent are filtered and separated to obtain a powdery phosphorus pentasulfide product. The process of the method has the characteristics of simple processing, short processing time, easy and safe operation, high product yield and the like; and the yield of the powdery product can reach 99 percent.

Description

technical field [0001] The invention belongs to the field of preparation of fine phosphorus chemical products in the chemical industry, and in particular relates to a preparation method of powdery phosphorus pentasulfide. Background technique [0002] Phosphorus pentasulfide is a light yellow or yellow-green crystalline substance with an odor similar to hydrogen sulfide and strong hygroscopicity. It is an important chemical raw material intermediate and is mainly used in the production of insecticides, high-efficiency organophosphorus pesticides, and advanced lubricating oil additives. It is used in organic synthesis to prepare various compounds containing sulfur or phosphorus, and in the pharmaceutical industry to produce drugs such as arabinosin and Yajining. In addition, in recent years, with the development of food grade phosphoric acid, phosphate, electronic grade phosphoric acid and other industries, phosphorus pentasulfide has been used more and more in chemical indus...

Claims

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Application Information

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IPC IPC(8): C01B25/14
Inventor 苏毅夏举佩李国斌
Owner KUNMING UNIV OF SCI & TECH
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