Fully-automatic continuous production method for insoluble sulfur

Abstract

The invention discloses a fully-automatic continuous production method for insoluble sulfur. The method comprises the steps: firstly, subjecting raw material sulfur to heating-up evaporation, and subjecting the sulfur vapor to a reaction with a composite solvent, so as to produce insoluble sulfur; conveying carbon disulfide sprayed insoluble sulfur to a horizontal type roller centrifugal drier in a sealed spiral pipeline conveyor, and carrying out separation; then, carrying out baking treatment by a vacuum-suction-filtration dryer, enabling soluble-sulfur containing carbon disulfide to pass through filter cloth and be discharged from a drain pipe of the vacuum-suction-filtration dryer, and leaving insoluble sulfur powder; and continuously introducing hot water of 80 DEG C to 90 DEG C into a jacket of the vacuum-suction-filtration dryer, and carrying out heating so as to simultaneously complete the curing and drying of the insoluble sulfur. According to the insoluble sulfur prepared by the method disclosed by the invention, the content reaches up to 95.8% to 98.7%, the thermal stability 120 DEG C*15min can reach 55% to 56%, the dispersion in milled rubber is uniform, and the rubber sheet binding is firm.

Description

technical field [0001] The invention relates to the technical field of insoluble sulfur production technology, in particular to a method for fully automatic and continuous production of insoluble sulfur. 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 is insoluble in carbon disulfide and rubber, so it is called insoluble sulfur or polymeric sulfur. The scientific name is high Molecular polymeric sulfur (abbreviated as IS in English), 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 preparation methods of insoluble sulfur mainly include gasification method, melting method, contact method and radiation method. [0003] In the 1930s, the American Stauffer Company first obtained the patent for the preparation of low-grade insoluble sulfur (insoluble sulfur mass fract...

AI Technical Summary

Problems solved by technology

During the Seventh Five-Year Plan period, in order to meet the supporting needs of the country's introduction of steel wire radial tires, according to incomplete statistics, more than 30 research institutes, colleges and chemical plants in more than 20 provinces and cities across the country have invested in the research of insoluble sulfur production technology , built dozens of different production devices, but there are generally problems such as small scale, backward part of unit equipment, high production cost, and environmental protection failure.

The authorized notification number is CN101066753B, a Chinese invention patent, which uses water-sealed carbon disulfide to ensure that the carbon disulfide solvent does not boil and does not catch fire; resources; and according to data reports and practice certification, the solubility of carbon disulfide in water at 20°C is one thousandth, which is easy to cause water pollution, and manual rakes are used to scrape materials, which cannot be continuously produced

The Chinese invention patent with the authorized notification number CN101362837B adopts the preparation method of quenching and hanging pieces, drying, crushing, and then extracting and purifying, which requires secondary crushing of insoluble sulfur, which increases production costs and easily causes dust to escape during the crushing process. Flying, polluting the environment

The authorized announcement number is CN101337660B Chinese invention patent, the three vacuum dryers use valves and quick connectors to release the mixed material, which is easy to cause leakage of the liquid insoluble sulfur mixture, and intermittent manual operation cannot continuously produce insoluble sulfur

The authorized notification number is CN101343045B, a Chinese invention patent, which adopts a low-efficiency process, intermittent operation, and cannot be continuously produced; although sulfur heating, curing, stabilization, and crushing are completed in one machine, the sulfur spraying device is in a static state, and the materials are very easy to stick Agglomeration makes it difficult to extract and purify incompatible sulfur, which not only leads to a production cycle of more than 32 hours, but also makes it difficult to improve the product purity. When the insoluble sulfur is discharged, it is easy to block the feeding port, the process index is difficult to control, and the quality of different batches varies. Stable, low degree of automation, semi-finished products have to be crushed, dust pollutes the environment

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