Production method of high-quality insoluble sulfur

A production method and high-quality technology, applied in the preparation/purification of sulfur, etc., can solve the problems of poor thermal stability, prolong production cycle, need manpower and equipment, etc., achieve high thermal stability and improve dispersibility, optimize production environment, The effect of reducing production costs

Active Publication Date: 2012-10-17
SHANDONG SUNSINE CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some manufacturers in China have used solvent one-step method and continuous one-step method to prepare insoluble sulfur. Although the quality has been improved, the following problems still exist: ① Not enough attention is paid to quenching equipment, and liquid sulfur is generally in the form of columnar fluid and The quenching agent is quenched and mixed, the quenching effect is not good, the retention rate of insoluble sulfur is low, and the thermal stability is poor; and the ejected sulfur will pile up into lumps, which directly affects the effect of subsequent solidification and extraction and purification
② The fineness of the dried material is not enough, it needs a crushing process, manpower and equipment, prolonging the production cycle, and must have a good dust recovery device and anti-static measures, the safety is not good
③ Insoluble sulfur has poor dispersibility in rubber processing, which can easily cause uneven vulcanization of the rubber compound, affect the processing performance of the rubber compound, and thus affect the performance of rubber products

Method used

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  • Production method of high-quality insoluble sulfur

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Experimental program
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Effect test

Embodiment 1

[0025] The present invention is a kind of production method of high-quality insoluble sulfur, comprises the following steps:

[0026] (1) Put the solid sulfur or liquid sulfur of ordinary sulfur into the molten sulfur pool for melting or heat preservation, and the temperature is controlled at 120-150°C; the molten liquid sulfur is pumped into the heating tank with a sulfur metering pump, and the temperature is automatically raised and controlled The temperature is 350-360°C.

[0027] (2) In the two-flow sulfur atomizing nozzle, high-pressure N 2 The high-temperature liquid sulfur flowing out in the form of a liquid film is uniformly atomized, then fully contacted with the quenching liquid from all directions in the quenching synthesizer, and cooled rapidly to form uniform insoluble sulfur particles and suspend in the quenching liquid. The quenching liquid is carbon disulfide containing stabilizer.

[0028] (3) The mixed suspension enters into a reactor equipped with a stirri...

Embodiment 2

[0036] The present invention is a kind of production method of high-quality insoluble sulfur, comprises the following steps:

[0037] (1) Put the solid sulfur or liquid sulfur of ordinary sulfur into the molten sulfur pool for melting or heat preservation, and the temperature is controlled at 120-150°C; the molten liquid sulfur is pumped into the heating tank with a sulfur metering pump, and the temperature is automatically raised and controlled The temperature is 400-410°C.

[0038] (2) In the two-flow sulfur atomizing nozzle, high-pressure N 2 The high-temperature liquid sulfur flowing out in the form of a liquid film is uniformly atomized, then fully contacted with the quenching liquid from all directions in the quenching synthesizer, and cooled rapidly to form uniform insoluble sulfur particles and suspend in the quenching liquid. The quenching liquid is carbon disulfide containing stabilizer.

[0039] (3) The mixed suspension enters the reactor with a stirring device, a...

Embodiment 3

[0046] The present invention is a kind of production method of high-quality insoluble sulfur, comprises the following steps:

[0047] (1) Put the solid sulfur or liquid sulfur of ordinary sulfur into the molten sulfur pool for melting or heat preservation, and the temperature is controlled at 120-150°C; the molten liquid sulfur is pumped into the heating tank with a sulfur metering pump, and the temperature is automatically raised and controlled The temperature is 440-450°C.

[0048] (2) In the two-flow sulfur atomizing nozzle, high pressure N 2The high-temperature liquid sulfur flowing out in the form of a liquid film is uniformly atomized, then fully contacted with the quenching liquid from all directions in the quenching synthesizer, and cooled rapidly to form uniform insoluble sulfur particles and suspend in the quenching liquid. The quenching liquid is carbon disulfide containing stabilizer.

[0049] (3) The mixed suspension enters the reactor with a stirring device, an...

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Abstract

The invention provides a production method of high-quality insoluble sulfur, which comprises the following steps of : (1) melting sulfur and heating up; (2) performing spray quenching; (3) curing, and performing extraction separation; (4) cladding; (5) drying; and (6) charging oil to obtain the product finally. The production method provided by the invention is a continuous production method. Through this method, the product yield, high thermal stability and dispersion are greatly improved; and meanwhile, the product does not need to be smashed, thus shortening the production process and optimizing the production environment. The method achieves the recycling of the raw materials and reduces the production cost, which belongs to the green technology.

Description

technical field [0001] The invention relates to a production method of insoluble sulfur, in particular to a production method of high-quality insoluble sulfur. Background technique [0002] Insoluble sulfur is an allotrope of ordinary sulfur. It is a linear polymer formed by the polymerization of a large number of sulfur atoms. It is insoluble in carbon disulfide and rubber, so it is called insoluble sulfur or polymeric sulfur. The scientific name is high Molecular polymeric sulfur (English name is INSOLUBIESULFUR, referred to as IS), it is mainly used as a vulcanizing agent in the rubber industry and is widely used in the production of rubber products such as tires. In recent years, some manufacturers in China have used solvent one-step method and continuous one-step method to prepare insoluble sulfur. Although the quality has been improved, the following problems still exist: ① Not enough attention is paid to quenching equipment, and liquid sulfur is generally in the form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12
Inventor 张颂王波马跃彬刘经福徐均
Owner SHANDONG SUNSINE CHEM
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