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Method for one-step preparation of insoluble sulfur

A sulfur and soluble technology, which is applied in the field of one-step preparation of insoluble sulfur, can solve the problems of poor quenching effect and low conversion rate, and achieve the effects of high production efficiency, increased content, and improved production safety

Active Publication Date: 2014-01-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the quenching of the liquid flow is basically pouring or dripping, and the quenching effect is poor, resulting in a low conversion rate, which is why the content of insoluble sulfur produced by the melting method is lower than that of the gasification method.

Method used

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  • Method for one-step preparation of insoluble sulfur
  • Method for one-step preparation of insoluble sulfur
  • Method for one-step preparation of insoluble sulfur

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The raw sulfur is directly heated to 120°C to make it melt; the molten sulfur liquid is centrifugally atomized by an atomizer under pressure into sulfur droplets with an average particle size of 10 μm; at the same time, it is heated to 200°C by a heater 2 After being distributed by the gas distributor, it is mixed with the sulfur mist; the sulfur mist stays on the upper part of the tower for 25 seconds, and the nitrogen outlet temperature is controlled at 180°C; the polymerized sulfur is then cooled to 0°C by the cooling device and distributed through the gas distributor The nitrogen gas mixed with the nitrogen gas enters the lower part of the tower body, and is cooled to below 60°C within 2 seconds; the insoluble sulfur product is obtained by cyclone separation, collection, and packaging; the nitrogen gas discharged from the tower body is separated from the residual sulfur particles and recycled.

Embodiment 2

[0029] The raw sulfur is heated to 130°C to melt it; the molten sulfur liquid is centrifugally atomized into sulfur droplets with an average particle size of 20 μm through an atomizer; at the same time, it is heated to 230°C by a heater. 2 After being distributed by the gas distributor, it is mixed with the sulfur mist; the sulfur mist stays in the upper part of the tower for 25 seconds, and the nitrogen outlet temperature is controlled at 200°C; the polymerized sulfur is then cooled to -10°C by the cooling device and passed through the gas distributor The distributed nitrogen gas is mixed, enters the lower part of the tower body, and is cooled to below 60°C within 5 seconds; cyclone separation, collection, packaging, and insoluble sulfur products are obtained; nitrogen gas discharged from the tower body is separated from residual sulfur particles and recycled.

Embodiment 3

[0031] The raw sulfur is directly heated to 130°C to melt it; the sulfur liquid is centrifugally atomized into sulfur droplets with an average particle size of 20 μm through the atomizer; at the same time, the N 2 After being distributed by the gas distributor, it is mixed with sulfur droplets; the sulfur droplets stay in the upper part of the tower for 20 seconds, and the nitrogen outlet temperature is controlled at 210°C; the polymerized sulfur is then cooled to -20°C by the cooling device and passed through the gas distributor The distributed nitrogen gas is mixed, enters the lower part of the tower body, and is cooled to below 60°C in 5 seconds; cyclone separation, collection, packaging, and insoluble sulfur products are obtained; nitrogen gas discharged from the tower body is separated from residual sulfur particles and recycled.

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Abstract

The invention relates to a method for one-step preparation of insoluble sulfur. In a production process of insoluble sulfur, rapid cooling is one of very key process steps, realizes an effect of instantly stopping a reversible reaction and further directly affects the content of insoluble sulfur in a product. The method provided by the invention comprises the following steps of directly heating raw material sulfur to 120-150 DEG C, forming a large number of sulfur liquid droplets by centrifugal atomization through an atomizer, and increasing the specific surface area of sulfur; then heating to 180-240 DEG C by circulating hot nitrogen for ring-opening polymerization, and keeping for 2-25 seconds; further cooling by circulating cold nitrogen, and cooling to below 60 DEG C at 2-20 seconds; performing cyclone separation, collecting and packaging to obtain the insoluble sulfur product, wherein the average particle size of the product is 10 mu m-50 mu m; recycling the separated nitrogen. The method provided by the invention has the advantages of simple process, safety, environmental friendliness and low cost.

Description

technical field [0001] The invention relates to a one-step method for preparing insoluble sulfur, in particular to a method for rapidly cooling the insoluble sulfur by using a spraying process and cold nitrogen gas, effectively restraining the progress of the reverse reaction, and obtaining the insoluble sulfur. The invention has the advantages of simple process, safety and environmental protection, and low cost. Background technique [0002] Insoluble sulfur (IS), also known as polymeric sulfur, also known as μ-type sulfur, refers to sulfur insoluble in carbon disulfide. It is a long-chain polymer of sulfur. It is chemically and physically inert. The joint point is uniform, and the rubber vulcanized by it has the best non-blooming property, and can effectively prevent the early scorching of the rubber during the processing and improve the adhesion of the rubber to the steel wire or chemical fiber cord. It is a good choice for the production of radial tires. special vulcani...

Claims

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Application Information

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IPC IPC(8): C01B17/12
Inventor 王益庆周静张立群
Owner BEIJING UNIV OF CHEM TECH
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