Production method of high-dispersion high-thermal-stability insoluble sulfur

A production method and high-dispersion technology, applied in the preparation/purification of sulfur, can solve the problems of poor sulfur dispersibility and low thermal stability, shorten the vulcanization time, overcome the poor adhesion of rubber materials, and aging performance Improved effect

Inactive Publication Date: 2013-09-25
SHANGHAI JINGHAI ANHUI CHEM
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  • Abstract
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AI Technical Summary

Problems solved by technology

The insoluble sulfur produced by the prior art has the problems of poor dispersibility and low thermal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The production method of highly dispersed and highly heat-stable insoluble sulfur comprises the following steps:

[0020] (1) Sulfur melting and heating up: heat ordinary sulfur to melt sulfur, control the temperature at 145-150°C; pour the melt into the heating tank, raise the temperature to 270-280°C, add diethyl ether equivalent to 0.5% of sulfur weight Hydroxylamine, stir and disperse evenly, and then heat up to 490-510°C;

[0021] (2) Atomization and quenching: High-pressure N2 atomizes the molten high-temperature sulfur liquid evenly through the atomizing nozzle, and then fully contacts with carbon disulfide liquid at 0-5°C from all directions in the quenching synthesizer, and rapidly cools it to form Uniform insoluble sulfur particles suspended in carbon disulfide liquid;

[0022] (3) Solidification and separation: heat the carbon disulfide solution to 40-50°C, stir for 40-60 minutes, stop stirring, let it stand for 2 hours, take out the filter residue, and then...

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Abstract

The invention discloses a production method of high-dispersion high-thermal-stability insoluble sulfur. The method comprises the following steps: sulfur melting and heating: melting common sulfur at 145-155DEG C for sulfur melting, pumping the obtained melt to a heating tank, heating to 250-280DEG C, adding diethylhydroxylamine having a weight being 0.5-1% of the weight of sulfur, uniformly stirring, and heating to 490-550DEG C; and atomizing, quenching, curing, and cladding. The production method greatly improves the high-thermal-stability and the dispersibility of insoluble sulfur, and the insoluble sulfur obtained in the invention can completely satisfy the requirements of three-high insoluble sulfur by radial tires.

Description

technical field [0001] The invention relates to a production method of insoluble sulfur, in particular to a production method of highly dispersed and highly thermally stable insoluble sulfur. Background technique [0002] Insoluble sulfur has the property of being insoluble in carbon disulfide, and its scientific name is polymeric sulfur, referred to as lS. It contains different amounts of oil-extended ingredients, forming IS-series oil-extended and non-oil-extended products. [0003] The process of producing insoluble sulfur is basically divided into: sulfur melting and heating, quenching, solidification, extraction, filtration, drying, and screening. The most critical process links are quenching and solidification, which largely affect the high heat of the final product. stability. The insoluble sulfur produced by the prior art has the problems of poor dispersibility and low thermal stability. Contents of the invention [0004] In order to make up for the deficiencies...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12
Inventor 范建忠陆永清
Owner SHANGHAI JINGHAI ANHUI CHEM
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