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Method for preparing high-thermal-stability insoluble sulfur by using aromatic hydrocarbon end-capping agent containing carbocation structure

A technology with high thermal stability and carbocations, which is applied in the preparation/purification of sulfur, can solve the problems of thermal stability only between 42% and 45%, poor thermal stability of insoluble sulfur, and return to the original, and achieve reduction The effect of production cost, reduction of addition amount, and small usage amount

Inactive Publication Date: 2016-11-23
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the specific production method, please refer to our company's patent 200810139262.0. The indicators of the insoluble sulfur product produced by this method are very good, but the thermal stability at 120°C / 15min is only between 42% and 45%.
Due to the poor thermal stability of insoluble sulfur, it is easy to return to the original state during the rubber mixing process, resulting in blooming

Method used

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  • Method for preparing high-thermal-stability insoluble sulfur by using aromatic hydrocarbon end-capping agent containing carbocation structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. Add 0.1% (relative to the quenching liquid) triphenylphosphine into the quenching liquid, mix well, add 0.05% concentrated nitric acid, and mix for 30 minutes. Carry out end-capping reaction, then carry out washing, drying and oil-filling treatment to obtain insoluble sulfur finished product.

Embodiment 2

[0018] Example 2: Add 1.0% (relative to the quenching liquid) trityl alcohol into the quenching liquid, mix well, add 0.5% concentrated sulfuric acid, and mix for 30 minutes. Carry out end-capping reaction, then carry out washing, drying and oil-filling treatment to obtain insoluble sulfur finished product.

Embodiment 3

[0019] Example 3: Add 1.5% (relative to the quenching liquid) triphenylmercaptan into the quenching liquid, mix well, add 1.0% concentrated hydrochloric acid, and mix for 30 minutes. Carry out end-capping reaction, then carry out washing, drying and oil-filling treatment to obtain insoluble sulfur finished product.

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Abstract

The invention provides a method for preparing high-thermal-stability insoluble sulfur by using an aromatic hydrocarbon end-capping agent containing a carbocation structure; in quenching cooling fluid for producing the insoluble sulfur, the aromatic hydrocarbon end-capping agent providing the carbocation structure is added, long-chain unstable polymerized sulfur formed at high temperature is subjected to an end-capping reaction in a quenching cooling process, and the high-thermal-stability insoluble sulfur is obtained. The 120 DEG C / 15 min thermal stability of the insoluble sulfur produced by the method can reach more than or equal to 50%. No side products are produced, and the method is simple to operate, easy to implement, and suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for producing insoluble sulfur, in particular to a method for producing insoluble sulfur with high thermal stability by using an aromatic hydrocarbon capping agent providing a carbocation structure for capping reaction. 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 has the property of being insoluble in carbon disulfide and insoluble in rubber, so it is called insoluble sulfur or polymerized sulfur. It is called polymer polymer sulfur (English name is INSOLUBIESULFUR, referred to as IS), and 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. The production of IS is usually to heat and vaporize the molten liquid sulfur, spray it into the cooling medium, quench, wash, dry, pulverize, and fill with oil to obtain th...

Claims

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Application Information

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IPC IPC(8): C01B17/12
Inventor 张凤丽马跃斌张颂王波鲍翠吴艳萍
Owner SHANDONG SUNSINE CHEM
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