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A kind of production technology of insoluble sulfur

A production process, sulfur technology, applied in the field of insoluble sulfur production process, can solve problems such as difficulty in completion, achieve the effect of improving product quality, improving curing effect, and avoiding mutual adhesion

Active Publication Date: 2011-12-14
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the insoluble sulfur in the rubber state is cured in carbon disulfide, the tendency of sticking cannot be avoided, so it needs to be pulverized in the later stage
It is worth noting that when the particles of insoluble sulfur are large, it is difficult to achieve high-quality curing

Method used

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  • A kind of production technology of insoluble sulfur

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add dichloromethane and carbon disulfide uniformly mixed at a temperature of 25°C into the bottom of the quench tower at a mass ratio of 1:10 to serve as a quench liquid for high-temperature sulfur. Then add sulfur powder with an insoluble sulfur content of 60wt% to the quenching liquid, and form a sulfur suspension with a concentration of 10wt% by stirring.

[0033] Vaporize liquid sulfur at 640-660°C, control the temperature at 650°C, pass through the spiral blade of the nozzle at a rate of 135 kg / hour, disperse and spray it into the sulfur suspension at the bottom of the quenching tower, and instantly drop the temperature of sulfur vapor to 50°C the following. The suspension state of the quenched insoluble sulfur is kept by stirring, and at the same time, it is dispersed and isolated by the pre-added sulfur suspension for solidification. The system temperature is maintained at 55±5°C for 2.5 hours of curing.

[0034] The solidified insoluble sulfur in the suspensio...

Embodiment 2

[0038] Add insoluble sulfur to the carbon disulfide quenching solution to prepare a sulfur suspension with a concentration of 10 wt%. The suspension is sprayed by the spraying device at the top of the quenching tower to form dispersed droplets, and the spraying speed of the sulfur suspension is controlled to be 520 kg / hour.

[0039] The liquid sulfur is heated and vaporized, controlled at 660°C, and sprayed into the quenching tower at a rate of 130 kg / hour. The sulfur vapor is quenched by the dispersed droplets of the above-mentioned sulfur suspension liquid from top to bottom, so that the temperature of the sulfur vapor drops instantly. To below 50°C; the insoluble sulfur after quenching falls into the tank pool at the bottom of the quenching tower together with the suspension, and the suspension of the insoluble sulfur in carbon disulfide is maintained by stirring at the bottom, and the insoluble sulfur particles in the sulfur suspension are added Disperse and isolate for cu...

Embodiment 3

[0044] As described in Example 2, the difference is that ordinary sulfur powder is added to the toluene quenching liquid to prepare a suspension with a concentration of 10 wt%.

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Abstract

The invention relates to a process for producing insoluble sulphur. In the process, industrial sulphur is used as a raw material. The process comprises the following steps of: a, heating; b, quenching; c, curing; d, extracting; e, filtering; f, drying; and g, sieving, wherein in the step b, sulphur powder and quenching liquid are added into quenching equipment in advance before quenching to form turbid liquid of the sulphur by stirring, and high-temperature sulphur is sprayed to the turbid liquid of the sulphur to be quenched or the quenching liquid or the turbid liquid of the sulphur is added to the bottom of the quenching equipment in advance, and the high-temperature sulphur is quenched by the turbid liquid of the sulphur in a spraying mode or the turbid liquid of the sulphur is added to the bottom of the quenching equipment in advance, and the high-temperature sulphur is sprayed and quenched by the quenching liquid. In the process, mutual adhesion among insoluble sulphur granules formed through quenching is prevented under the dispersing isolation action of the turbid liquid of the sulphur, and the curing effect and quality of the insoluble sulphur can be improved obviously.

Description

technical field [0001] The invention relates to a production process of insoluble sulfur. Background technique [0002] Insoluble sulfur is obtained by thermal polymerization of ordinary sulfur and is insoluble in carbon disulfide. As a high-grade accelerator and vulcanization crosslinking agent in the rubber industry, it has the ability to prevent blooming and improve the adhesion between layers of multi-layer rubber products. Strength, effectively reducing the scorching phenomenon of rubber materials during storage, etc. It is an essential and important raw material in tire production, especially in the production of automotive all-steel radial tires. [0003] There are currently two main methods for the production of insoluble sulfur: high temperature method and low temperature method. Compared with the low-temperature method, the temperature of sulfur in the production route of the high-temperature method generally needs to rise above 400°C. Because the high-temperatu...

Claims

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Application Information

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IPC IPC(8): C01B17/12
Inventor 杜孟成王维民孙庆刚
Owner SHANDONG YANGGU HUATAI CHEM
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