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Separation method of insoluble sulfur
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A separation method, sulfur technology, applied in chemical instruments and methods, sulfur preparation/purification, sulfur compounds, etc. Insoluble sulfur separation, development of refining methods, etc., to achieve the effect of stabilization and cost saving
Active Publication Date: 2016-07-06
H SULFUR
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[0013] However, in the existing manufacturing methods, the importance of the separation and refining methods of the above-mentioned insoluble sulfur has not been realized, or the development of the separation and refining methods of the insoluble sulfur has not been realized. Therefore, it is difficult to produce at present. High quality insoluble sulfur used as vulcanizing agent
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Embodiment 1
[0074] The centrifugal dehydrator equipped with a 120-mesh filter bag was supplied at a rate of 2650kg / hr at a rate of 2650kg / hr for 15 minutes while rotating at 560rpm at 28°C, and then centrifuged and dehydrated at 1200rpm for 12 minutes, and then, Spin the centrifuge at 560rpm, inject 100kg of clean (new) carbon disulfide solution, inject for 60 seconds, after that, spin the centrifuge at 180rpm while running the scraper for 40 seconds, separate and discharge from the filter bag and centrifuge at 1200rpm for 12 minutes After separation, the block-shaped insoluble sulfur obtained was washed and then vacuum-dried to obtain the insoluble sulfur of a yellow powder having the following characteristics, Figure 2a A photograph of the particle size taken with an electron microscope is shown.
[0075] IS content: 91%
[0076] HTS (105°C / 15 minutes): 72%
[0077] Sieve residue (100 mesh): 1.3%
Embodiment 2
[0079] The centrifugal dehydrator equipped with a 180-mesh filter bag was supplied at a rate of 2590kg / hr at a rate of 2590kg / hr for 12 minutes while rotating at 580rpm at 25°C, and then centrifuged and dehydrated at 1210rpm for 13 minutes. After that, Spin the centrifuge at 580rpm, inject 120kg of clean (new) carbon disulfide solution, inject for 75 seconds, after that, spin the centrifuge at 190rpm while running the scraper for 50 seconds, separate and discharge from the filter bag and centrifuge at 1210rpm for 13 minutes After separation, the block-shaped insoluble sulfur obtained was washed and then vacuum-dried to obtain the insoluble sulfur of a yellow powder having the following characteristics, Figure 2b A photograph of the particle size taken with an electron microscope is shown.
[0080] IS content: 92%
[0081] HTS (105°C / 15 minutes): 74%
[0082] Sieve residue (100 mesh): 1.4%
Embodiment 3
[0084] The centrifugal dehydrator equipped with a 220-mesh filter bag was supplied at a rate of 3350kg / hr at a rate of 3350kg / hr for 15 minutes while rotating at 595rpm at 30°C, and then centrifuged and dehydrated at 1215rpm for 15 minutes, and then, Spin the centrifuge at 595rpm, inject 150kg of clean (new) carbon disulfide solution, inject for 85 seconds, after that, spin the centrifuge at 210rpm while running the scraper for 55 seconds, separate and discharge from the filter bag and centrifuge at 1215rpm for 15 minutes After separation, the block-shaped insoluble sulfur obtained was washed and then vacuum-dried to obtain the insoluble sulfur of a yellow powder having the following characteristics, Figure 2c A photograph of the particle size taken with an electron microscope is shown.
[0085] IS content: 91%
[0086] HTS (105°C / 15 minutes): 72%
[0087] Sieve residue (100 mesh): 1.3%.
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Abstract
The present invention provides a method for isolation of insoluble sulfur, for separating / refining highly-purified insoluble sulfur which can serve as a vulcanizing agent from an insoluble sulfur seriflux manufactured by a quick cooling method where carbon disulfide is used as a refrigerating fluid. According to the method for isolating and refining the insoluble sulfur, the carbon disulfide refrigerating fluid, soluble sulfur and the like are removed from the insoluble sulfur seriflux manufactured by a quick cooling method where the carbon disulfide is used as the refrigerating fluid, so as to produce the highly-purified insoluble sulfur which can serve as the vulcanizing agent in the rubber industry. Moreover, according to the separating and refining method, the high-priced refrigerating fluid can be recycled and reused, thereby saving manufacture cost and realizing stability of a manufacture environment. The insoluble sulfur produced according to the method has a high quality, the content of the insoluble sulfur in the total sulfur is over 90%, a imperfection screening amount is lower than 1.5%, a high throughput screening (HTS) amount is over 71%, and the particle size is 5-30 [mu]m. Therefore, insoluble sulfur can serve as the vulcanizing agent in the rubber industry, especially for producing tires.
Description
technical field [0001] The present invention relates to a method of separation / refining of insoluble sulfur. In more detail, the present invention relates to a method of separating and refining insoluble sulfur from an insoluble sulfur-containing suspension (slurry) obtained in the process of producing insoluble sulfur by a rapid cooling method using carbon disulfide as a refrigerant. Background technique [0002] Insoluble sulfur refers to sulfur insoluble in carbon disulfide (CS2), and is also called polymer sulfur. Generally, sulfur in this state (insoluble sulfur) is composed of thousands of sulfur atoms, a polymer with a molecular weight of more than 100,000 and a particle size of 5 μm to 30 μm. Insoluble sulfur is non-crystalline, which is different from sulfur dissolved in carbon disulfide, which is generally in the form of crystals. [0003] The usual method for producing insoluble sulfur is to heat liquid sulfur (S8) to produce sulfur vapor, then use carbon disulf...
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