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Production process for preparing insoluble sulphur through low temperature method

A production process and technology of low temperature method, which is applied in the field of production technology for preparing insoluble sulfur by low temperature method, can solve the problems of insoluble sulfur energy consumption, high equipment requirements, and low safety, and achieve simple production equipment and process, and low energy consumption Effect

Inactive Publication Date: 2015-08-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing high-temperature method to produce insoluble sulfur requires high energy consumption and equipment, and low safety; therefore, the development of low-temperature method to produce high-heat insoluble sulfur has broad application prospects

Method used

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  • Production process for preparing insoluble sulphur through low temperature method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Pour 1 kg of ordinary industrial sulfur with a content of 99.9% into a high-level sulfur melting tank and raise the temperature to 150°C to liquefy, and use the high-level difference to mix the liquid sulfur and the composite stabilizer (composition: 0.5gI 2 +2.5gDZ) into the stirred reactor, polymerize at 250°C for 35 minutes, flow the molten sulfur into the intermediate tank through the discharge valve, spray it into the quenching liquid through the nozzle, and control the temperature of the quenching liquid at 10°C , add 0.01% composite stabilizer to the quenching liquid. Dried at 60°C for 10 hours, crushed to more than 200 mesh, extracted with carbon disulfide at 20°C; dried the extracted insoluble sulfur at 60°C for 5 hours, added 0.05% composite stabilizer, extended oil with high thermal stability Insoluble sulfur. Analysis of its thermal stability is 50.4% at 120℃╳15min, and the content of insoluble sulfur is 98.3%.

Embodiment 2

[0027] Pour 1kg of ordinary industrial sulfur with a content of 99.9% into a high-level sulfur melting tank and heat it up to 150°C to liquefy, and use the high-level difference to add liquid sulfur and composite stabilizer (composition: 0.3gKI+1.5gDM) into the reactor with stirring. Polymerize at 260°C for 30 minutes, pour the molten sulfur into the intermediate tank through the discharge valve, spray it into the quenching liquid through the nozzle, control the temperature of the quenching liquid at 12°C, and add 0.02% composite stabilizer to the quenching liquid . Dried at 65°C for 12 hours, crushed to more than 200 mesh, extracted with carbon disulfide at 40°C; dried the extracted insoluble sulfur at 70°C for 3 hours, added 0.08% composite stabilizer, oil-extended with high thermal stability Insoluble sulfur. Analysis of its thermal stability is 51.5% at 120℃╳15min, and the content of insoluble sulfur is 98.7%.

Embodiment 3

[0029] Pour 1kg of ordinary industrial sulfur with a content of 99.9% into a high-level sulfur melting tank and heat it up to 150°C to liquefy, and use the high-level difference to mix the liquid sulfur and the composite stabilizer (composition: 1.0gI 2 +1.5gDZ) into the stirred reactor, polymerize at 250°C for 35 minutes, flow the molten sulfur into the intermediate tank through the discharge valve, spray it into the quenching liquid through the nozzle, and control the temperature of the quenching liquid at 8°C , add 0.05% composite stabilizer to the quenching liquid. Dried at 70°C for 13 hours, crushed to more than 200 mesh, extracted with carbon disulfide at 30°C; dried the extracted insoluble sulfur at 40°C for 12 hours, added 0.03% composite stabilizer, oil-extended with high thermal stability Insoluble sulfur. Its thermal stability is 48.1% at 120℃╳15min, and the content of insoluble sulfur is 99.0%.

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Abstract

The present invention relates to a production process for preparing insoluble sulphur through a low temperature method, wherein ordinary industrial sulphur is adopted as a raw material, heating liquefaction, polymerization reaction, quenching, drying, crushing, extraction and oil filling are sequentially performed, the polymerization reaction is performed at a temperature of 220-300 DEG C, and stabilizers are respectively added during the polymerization reaction stage, the quenching stage, and the oil filling stage, such that the prepared insoluble sulphur has high thermal stability and high content. The process for producing the insoluble sulphur has advantages of low production equipment investment, simple process, low energy consumption, and the like.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a production process for preparing insoluble sulfur by a low-temperature method. Background technique [0002] Insoluble sulfur is mainly used as an advanced accelerator and vulcanizing agent in the rubber industry, and is widely used in the manufacture of tires and other rubber composite products, such as tire carcass rubber, buffer rubber, white sidewall rubber and retreading, It can also be used in rubber materials such as rubber hoses and tapes bonded with skeleton materials, and can also be used in rubber products such as cables, rubber rollers, oil seals, rubber shoes, etc., and also used in light-colored rubber products with a large amount of sulfur. Because insoluble sulfur can make the meridian, steel wire and rubber stick more firmly, effectively prevent the rubber from blooming, and improve the heat resistance and wear resistance of the tire, therefo...

Claims

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Application Information

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IPC IPC(8): C01B17/12
Inventor 杨忠林赵华罗娟张雪杰
Owner CHINA PETROLEUM & CHEM CORP
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