Preparation method of insoluble sulfur and used anti-reversion stabilizer thereby

A stabilizer and sulfur technology, which is applied in the preparation/purification of sulfur, chemical instruments and methods, sulfur compounds, etc., can solve the problems affecting product quality and the increase of black spots in insoluble sulfur products, so as to improve reversion and reduce stability Progression and Mixed Difficulty, Effects of Preventing Reversion

Active Publication Date: 2019-02-22
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent, the stabilizer is a pre-stabilizer, which is added in the melt polymerization stage, but the stabilizer is carbonized at high temperature, and the black spots of the insoluble sulfur product increase, which affects the quality of the product

Method used

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  • Preparation method of insoluble sulfur and used anti-reversion stabilizer thereby

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Embodiment 1

[0028]Input 10 tons of liquid sulfur at 120-140°C into the gasifier at a rate of 5 tons / hour. 0.1 kg of gaseous methane is fed into the pipeline at a rate of 0.05 kg / hour. After the liquid sulfur is added, the temperature is raised to 550°C for gasification. The gaseous methane is cracked into active free radicals under the action of sulfur vapor active free radicals. After the gasification is completed, the uniformly mixed gas in the gasifier is passed into the carbon disulfide quenching liquid. During the quenching process, the active free radicals generated by the cracking of methane seal the insoluble sulfur end groups generated by the polymerization of sulfur vapor, and the process is completed. The insoluble sulfur stabilization process is solidified after quenching, then extracted with carbon disulfide, and centrifuged to obtain solid particles. The solid particles are washed with carbon disulfide, dried, and filled with oil to obtain insoluble sulfur products. The obta...

Embodiment 2

[0030] Add 10 tons of liquid sulfur at 120-140°C to the gasifier at a rate of 5 tons / hour. During the feeding process of liquid sulfur, feed it into the liquid sulfur pipeline at a rate of 0.5 kg / hour through a mass flow meter. 1 kg of gaseous methane, after the liquid sulfur is added, is heated to 550°C for gasification, and the gaseous methane is cracked into active free radicals under the action of sulfur vapor active free radicals. After the gasification is completed, the uniformly mixed gas in the gasifier is passed into the carbon disulfide quenching liquid. During the quenching process, the active free radicals generated by the cracking of methane seal the insoluble sulfur end groups generated by the polymerization of sulfur vapor, and the process is completed. The insoluble sulfur stabilization process is solidified after quenching, then extracted with carbon disulfide, and centrifuged to obtain solid particles. The solid particles are washed with carbon disulfide, drie...

Embodiment 3

[0032] Add 10 tons of liquid sulfur at 120-140°C to the gasifier at a rate of 5 tons / hour. During the feeding process of liquid sulfur, feed it into the liquid sulfur pipeline at a rate of 5 kg / hour through a mass flow meter. 10 kg of gaseous methane. After the liquid sulfur is added, the temperature is raised to 550°C for gasification, and the gaseous methane is cracked into active free radicals under the action of sulfur vapor active free radicals. After the gasification is completed, the uniformly mixed gas in the gasifier is passed into the carbon disulfide quenching liquid. During the quenching process, the active free radicals generated by the cracking of methane seal the insoluble sulfur end groups generated by the polymerization of sulfur vapor, and the process is completed. The insoluble sulfur stabilization process is solidified after quenching, then extracted with carbon disulfide, and centrifuged to obtain solid particles. The solid particles are washed with carbon...

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Abstract

The invention provides a preparation method of insoluble sulfur and a used anti-reversion stabilizer thereby. According to the method disclosed by the invention, methane is selected as an anti-reversion stabilizer, and the methane is added into liquid sulfur at a sulfur vaporization stage according to a certain mass ratio and decomposed into living free radicals in the presence of living free radicals of sulfur vapor. In the process of quenching the sulfur vapor mixed with the methane, insoluble sulfur end groups produced by polymerization of the sulfur vapor are terminated by the living freeradicals produced by decomposition of the methane, and the insoluble sulfur stabilization process is completed. The methane is added at the liquid sulfur vaporization stage, and the methane is mixed with the sulfur vapor in a gaseous form after sulfur vaporization, rather than being added into the product at the later stage in a solid or liquid manner, so that uniform contact mixing of the insoluble sulfur and the stabilizer can be realized to the greatest degree, the stabilizing process and mixing difficulty of the stabilizer are reduced, and the production efficiency is increased; and moreover, the stabilizer is added at an earlier stage of production, so that reversion of the insoluble sulfur is avoided, and the product quality is improved.

Description

technical field [0001] The invention relates to an anti-reversion stabilizer of insoluble sulfur, and also relates to a preparation method of using the anti-reversion stabilizer to prepare insoluble sulfur with low reversion. Background technique [0002] Insoluble sulfur is polymerized sulfur insoluble in carbon disulfide obtained by thermal polymerization of ordinary sulfur and then quenched. The basic production process can be divided into the following steps: sulfur melting and heating, quenching, solidification, extraction, filtration, drying, sieving Divide and fill with oil. As a high-grade accelerator and vulcanization cross-linking agent in the rubber industry, insoluble sulfur has the advantages of no blooming, improving the bonding strength between layers of multi-layer rubber products, and effectively reducing the scorching phenomenon of rubber materials during storage. In the production of tires, especially in the production of automotive all-steel radial tires...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12
CPCC01B17/12C01B17/0216C01B17/0237C01B17/0226C01B17/0248C01P2006/37
Inventor 杜孟成郭庆飞王维民
Owner SHANDONG YANGGU HUATAI CHEM
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