Method for producing insoluble sulfur

Abstract

The invention discloses a method for producing insoluble sulfur, which comprises the steps of melting sulfur, extracting, drying and pulverizing. By using the method, the insoluble sulfur is continuously produced under the totally-enclosed condition of normal pressure, nitrogen of normal pressure is used for sealing a heating groove, and the extracting step and the pulverizing step are completed in the same reactor. The specific operation steps are as follows in sequence: (1) melting the sulfur and heating up; (2) extracting and pulverizing; and (3) drying to obtain products produced through the method. The method has the advantages that: (1) the insoluble sulfur is continuously produced under the totally-enclosed condition of the normal pressure, and nitrogen is used for sealing the upper space of the sulfur heating groove, thereby resulting in no oxide leakage of carbon bisulfide and sulfur, and achieving safe and environmental-friendly production; (2) the pulverizing and quenching processes are finished in the same multifunctional rotary reactor, thus saving pulverizing devices, avoiding dust pollution when pulverizing, and protecting production environment.

Description

technical field [0001] The invention belongs to the technical field of insoluble sulfur preparation, and in particular relates to a method for continuously producing insoluble sulfur under normal pressure and in a fully enclosed state. Background technique [0002] Insoluble sulfur, a polymer of sulfur, gets its name from being insoluble in carbon disulfide. Widely used in the tire industry as a vulcanizing agent, the demand for insoluble sulfur is growing rapidly with tire radialization. Therefore, in recent years, the research on insoluble sulfur has also attracted more and more attention, and some production methods have also been developed, but there are some problems in quality stability, safety, environmental protection and other aspects. Such as the one-step production method of insoluble sulfur described in known patent No. 03117763.8, its high-temperature sulfur will be pressurized, and safety is poor; Its one-step semi-finished product all processes are finished i...

AI Technical Summary

Problems solved by technology

Such as the one-step production method of insoluble sulfur described in known patent No. 03117763.8, its high-temperature sulfur will be pressurized, and safety is poor; Its one-step semi-finished product all processes are finished in a tank, and process index control is difficult, and automation degree is low, and batch The quality is not stable; the semi-finished products have to be crushed, causing great dust pollution; high-temperature sulfur and carbon disulfide are fed into the mixer for cyclic quenching, which is easy to block the pipeline, making cleaning difficult and polluting the environment

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