Continuous production method of insoluble sulfur

Abstract

A continuous production method of insoluble sulfur comprises the steps of sulfur melting, extraction, curing, crushing and drying. The continuous production method of insoluble sulfur is carried out under a totally closed condition. The method concretely comprises the following steps: 1, placing sulfur in a sulfur melting pool (1), melting, pumping the molten sulfur to a heating coil tube (3) through a metering pump (2), heating, and mixing high-temperature sulfur with low-temperature carbon disulfide in an ejector (4) to complete quenching; 2, letting the quenched mixed liquid comprising insoluble sulfur and carbon disulfide into a continuous-rotation rotary kiln (6) through a rotary joint (5) to form a mixed liquid containing cured insoluble sulfur particles and carbon disulfide; 3, conveying the mixed liquid obtained in step 2 to a crushing pump (8), and crushing; 4, sending the mixed liquid containing crushed insoluble sulfur and carbon disulfide to a material crushing pot (9), and carrying out solid-liquid separation through a filter screen; and 5, sending insoluble sulfur to a vacuum dryer (10), and drying. The method has the advantages of continuous production of the insoluble sulfur under the totally closed condition, safety, environmental protection, stable product quality, high efficiency, and low energy consumption.

Description

[0001] technical field [0002] The invention relates to a fully enclosed method for continuously producing insoluble sulfur, which belongs to the technical field of insoluble sulfur preparation. Background technique [0003] Insoluble sulfur is a non-toxic, flammable yellow powder, named for its insolubility in carbon disulfide. It is obtained by thermal polymerization of ordinary sulfur. The number of sulfur atoms in the molecular chain is as high as 108 or more. It has the viscoelasticity and molecular weight distribution of high polymers. Therefore, it is also called elastic sulfur or polymeric sulfur. It belongs to inorganic polymer chemical raw materials. Insoluble sulfur is widely used in the rubber industry as a vulcanizing agent, and it grows rapidly with the increase of human demand for rubber. The existing production method of insoluble sulfur has the problems of poor quality stability, insufficient safety, high energy consumption, environmental protection and...

AI Technical Summary

Problems solved by technology

The method is continuous in the first half of the production process, that is, sulfur melting, extraction, solidification, and crushing are carried out continuously, but the next second half is intermittent. After the multifunctional rotary reaction tank 25 has completed the reaction process of one tank, it must Stop the tank, connect the quick connector to the multifunctional rotary reaction tank, let the mixed material in the C zone of the multifunctional rotary reaction tank 25 be put into the drier 35-1, 35-2 or 35-3 for drying, after drying, Immediately dismantle the quick connector 23, and the multifunctional rotary reaction tank 25 circulates the process of the first half of the production process again. For the entire insoluble sulfur production process, it is not a completely continuous production process, resulting in low automation and labor intensity of the process. Large (quick connectors need to be installed and removed frequently), batch quality is not stable

In addition, this process also has high-temperature sulfur directly entering the reactor, and sulfur above 420°C directly reacts with carbon disulfide at 10°C in the reaction tank, which is dangerous and poses a safety hazard

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