Liquid phase method for producing insoluble sulfur

A liquid phase method, sulfur technology, applied in the preparation/purification of sulfur, etc., can solve the problems of large consumption of raw materials, high polymerization conversion rate, flammable and explosive, etc., and achieve low consumption of raw materials, high insoluble sulfur content, Avoid flammable and explosive effects

Inactive Publication Date: 2016-06-08
SHANGHAI JINGHAI ANHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a high conversion rate of insoluble sulfur, but the reaction temperature is high, the consumption of raw materials is large, and the cost is high; it is flammable and explosive, the operation under pressure is dangerous, and the dust in the crushing process is high; and the thermal stability and dispersibility of the product All are poor; American Flex Company adopts the vaporization one-step method, which has high polymerization conversion rate, low sulfur consumption rate, high insoluble sulfur content, thermal stability and dispersibility in the product, but the melting temperature in the production process is as high as 550 ~600℃, high risk; moreover, the process is complex, the efficiency is low, and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Melting: first put the raw material industrial sulfur into the melting kettle at 200°C,

[0025] (2) Atomized cold extraction: The molten high-temperature liquid sulfur enters the pressure nozzle for atomization and cold extraction. 2 Solvent extraction is performed 3 times, each time for 40 minutes, so that the content of the product obtained after extraction is ≥95%.

[0026] (3) Stabilization treatment: the sulfur after atomization and cold extraction is added with a composite stabilizer for stabilization treatment for 30 minutes.

[0027] (4) Drying: Dry the stabilized sulfur with hot water at 50° C. for 6 hours under a vacuum degree ≥ 95%, so that the water content is controlled below 0.5%.

[0028] (5) Curing: the dried sulfur enters the tower collector with a stirrer, the soluble sulfur is dissolved, and the insoluble sulfur is solidified at a temperature of 45°C for 40-minutes;

[0029] (6) Oil filling: add aromatic oil for rubber whose mass is 20% of the ...

Embodiment 2

[0032] (1) Melting: first put the raw material industrial sulfur into the melting kettle at 220°C,

[0033] (2) Atomized cold extraction: The molten high-temperature liquid sulfur enters the pressure nozzle for atomization and cold extraction. 2 Solvent extraction is performed 4 times, 50 min each time, so that the content of the product obtained after extraction is ≥ 95%.

[0034] (3) Stabilization treatment: add compound stabilizer to the sulfur after atomization and cold extraction for 40 minutes of stabilization treatment.

[0035] (4) Drying: Dry the stabilized sulfur with hot water at 60° C. in an environment with a vacuum degree ≥ 95% for 8 hours under negative pressure, so that the water content is controlled below 0.5%.

[0036] (5) Curing: the dried sulfur enters the tower collector with a stirrer, the soluble sulfur is dissolved, and the insoluble sulfur is solidified at a temperature of 50°C for 50 minutes;

[0037] (6) Oil filling: add aromatic oil for rubber wh...

Embodiment 3

[0040] (1) Melting: first put the raw material industrial sulfur into the melting kettle at 250°C,

[0041] (2) Atomized cold extraction: The molten high-temperature liquid sulfur enters the pressure nozzle for atomization and cold extraction. 2 Solvent extraction is performed 4 times, 50 min each time, so that the content of the product obtained after extraction is ≥ 95%.

[0042] (3) Stabilization treatment: the sulfur after atomization and cold extraction is added with a composite stabilizer for stabilization treatment for 30-40 minutes.

[0043] (4) Drying: Dry the stabilized sulfur with hot water at 70° C. in an environment with a vacuum degree of ≥95% for 8 hours under negative pressure to control the water content below 0.5%.

[0044] (5) Curing: the dried sulfur enters the tower collector with a stirrer, the soluble sulfur is dissolved, and the insoluble sulfur is solidified at a temperature of 60°C for 50 minutes;

[0045] (6) Oil filling: add aromatic oil for rubbe...

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PUM

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Abstract

The invention discloses a liquid phase method for producing insoluble sulfur. The method comprises the steps of fusion, atomization and cold extraction, stabilizing treatment, drying, solidification, oil charge and smashing. Firstly, sulphur is added into a fusion kettle with the temperature of 200-250 DEG C and then enters a pressure type nozzle for atomization and cold extraction treatment, a compound stabilizer is added to the sulphur subjected to atomization and cold extraction for stabilizing treatment for 30-40 min, then negative pressure drying is conducted on the stabilized sulphur for 6-8 h with hot water with the temperature of 50-70 DEG C in the environment with the vacuum degree larger than or equal to 95%, then solidification is conducted, finally oil charge adsorption is conducted by adding aromatic hydrocarbon oil, and the insoluble sulfur is obtained after smashing. The insoluble sulfur prepared with the method has high thermal stability, high insoluble sulfur content, high dispersity and high fineness, and the technology is easy to operate, high in efficiency, low in cost, high in safety performance and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of sulfur production, and in particular relates to a method for producing insoluble sulfur by a liquid phase method. Background technique [0002] Insoluble sulfur (Insoluble Sulfur, referred to as IS) is a thermoplastic linear polymer homopolymer, which is an allotrope of sulfur. It is insoluble in carbon disulfide and is a rubber vulcanizing agent with excellent performance. It has many advantages in the production of radial tires, so it has become a special vulcanizing agent for the production of high-quality radial tires. With the development of the transportation and automobile industries, the demand for high-quality tires has led to an increasing demand for insoluble sulfur. However, insoluble sulfur is a metastable substance. When used alone, the stability will deteriorate with the increase of temperature, and the content will gradually decrease with the prolongation of storage time. Among the high-...

Claims

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Application Information

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