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A kind of production method of high-grade insoluble sulfur and its production stabilizer

A production method and high-grade technology, applied in the preparation/purification of sulfur, etc., can solve problems such as poor thermal stability of insoluble sulfur, and achieve the effects of preventing the reduction of insoluble sulfur content, preventing influence, and being difficult to degrade.

Active Publication Date: 2020-07-28
SHANGHAI JINGHAI ANHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the relatively poor thermal stability of the obtained insoluble sulfur produced by the existing process, and provide a production method of high-grade insoluble sulfur and a stabilizer for production thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of stabilizer for the production of high-grade insoluble sulfur of the present embodiment, this stabilizer is formulated by ammonium persulfate, ethyl sodium xanthate and iodine, and wherein the mass ratio of ammonium persulfate and ethyl sodium xanthate is 3: (4-5), the ratio of the mass of the mother liquor that ammonium persulfate and sodium ethyl xanthate form to iodine is (119-121): 1. The stabilizer of this embodiment can be added in multiple links, such as during quenching operation, during extraction operation, during drying operation, and during oil filling operation, its preferred dosage is 2% to 3% of the weight of the insoluble sulfur product. When added, it will reverse the appearance or nature of the product. The preparation process of the stabilizer of this embodiment is specifically: adding ammonium persulfate and ethyl sodium xanthate into water according to the mass ratio, ammonium persulfate and ethyl sodium xanthate react with water to precipi...

Embodiment 2

[0031] A production method of high-grade insoluble sulfur in this embodiment uses medium-grade insoluble sulfur semi-finished products as raw materials, and then obtains high-grade insoluble sulfur products through extraction, drying, sieving and oil-filling treatment, wherein the product obtained after extraction and After the stabilizing agent is mixed, carry out drying treatment together, the addition of stabilizing agent is 2% of gained insoluble sulfur product quality among the present embodiment, and the mass ratio of ammonium persulfate and ethyl sodium xanthate in the stabilizing agent is 2: 3, over The mass ratio of the mother liquor formed by ammonium sulfate and ethyl sodium xanthate to iodine is 120:1. In this example, a specific stabilizer is added to the product obtained after extraction, and the composition, proportion and addition amount of the stabilizer are optimized, so that the thermal stability of the obtained product can be effectively improved, It can al...

Embodiment 3

[0040] A kind of production method of high-grade insoluble sulfur of the present embodiment is basically the same as embodiment 2, and its difference mainly is: in the present embodiment, the addition amount of stabilizer is 3% of gained insoluble sulfur product quality, and persulfuric acid in the stabilizer The mass ratio of ammonium and ethyl sodium xanthate is 3:5, and the mass ratio of the mother liquor formed by ammonium persulfate and ethyl sodium xanthate to iodine is 119:1. The dried product is sieved with a 100-150 mesh screen, and then the high-grade insoluble sulfur semi-finished product and rubber oil obtained by sieving are stirred and mixed evenly. The rubber oil is naphthenic oil, and the high-grade insoluble sulfur semi-finished product is mixed with rubber oil The mixed mass percentages of oil are 80% and 20% respectively, and the thermal stability of the product obtained in this embodiment is closer to that obtained in Example 2.

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Abstract

The invention discloses a production method of high-grade insoluble sulfur and a stabilizer for production of the high-grade insoluble sulfur, and belongs to the technical field of sulfur production.The stabilizer for production of the high-grade insoluble sulfur is prepared from ammonium persulfate, sodium ethyl xanthate and iodine; the production method of the insoluble sulfur adopts a gasification-quenching method to produce the insoluble sulfur, and comprises the procedures of raw material gasification, quenching treatment, tablet washing, drying, smashing and sieving, wherein during drying treatment, a product obtained after tablet washing and the stabilizer are mixed and dried together, and the addition amount of the stabilizer accounts for 2-3 percent of the mass of an obtained insoluble sulfur product. The stabilizer of a special type is added in a sulfur production process, and a sulfur production technology is optimized, so that the heat stability of the obtained insoluble sulfur can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of sulfur production, and more specifically relates to a production method of high-grade insoluble sulfur and a stabilizer for production thereof. Background technique [0002] Insoluble sulfur, also known as elastic sulfur or polymeric sulfur, is a linear polymer formed by the polymerization of a large number of sulfur atoms. The relative molecular weight can reach tens of thousands. It is a non-toxic, flammable yellow powder obtained because it is insoluble in carbon disulfide. It is an allotrope and a polymer modified variety of high-polymerization form of ordinary sulfur. Insoluble sulfur is a high-efficiency rubber vulcanizing agent, which has good distribution stability in the rubber compound, uniform vulcanization and cross-linking points of the product, can overcome the "blooming" on the surface of the rubber compound, and improve the bonding of rubber and steel wire or chemical fiber cord, etc. , s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/12
CPCC01B17/12
Inventor 陈杰胡建敏
Owner SHANGHAI JINGHAI ANHUI CHEM
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