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Separation and extraction method for sulfur powder in water during preparation of insoluble sulfur

A preparation process and technology of sulfur powder, applied in the field of non-metallic elements and their compounds, can solve the problems of no water, increase of separation equipment and difficulty, decrease of extraction efficiency, etc., achieve good high temperature stability, reduce fire and explosion occurrence The probability of separating simple effects

Pending Publication Date: 2020-01-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method needs to separate the insoluble sulfur from water due to the use of pulverization in water, which increases the separation equipment and difficulty virtually. In addition, the insoluble sulfur extraction process should not have water as much as possible, otherwise the extraction efficiency will decrease and the product will be affected. Therefore, this patent application proposes an integrated solution for separation and extraction, which not only reduces the separation difficulty but also improves the separation efficiency, and also improves the extraction effect

Method used

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  • Separation and extraction method for sulfur powder in water during preparation of insoluble sulfur

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Effect test

Embodiment 1

[0036] In the laboratory according to the characteristics of the present invention prepared a figure 1 A small-scale experimental device, the low-temperature melting method is used to obtain crude insoluble sulfur, wherein the content of insoluble sulfur is 35%, and the crude insoluble sulfur is a strip with a length of 5-10cm and a diameter of 1-2mm. The crude insoluble sulfur product is pulverized in water, and filtered with a filter to obtain the insoluble crude sulfur powder water slurry with a particle size of 100-400 mesh, and the insoluble crude sulfur powder slurry is pumped into the separation tank with a pump, and the separated water is reused, and then pumped to the separation tank. The solvent and sulfur powder slurry at the bottom of the separation tank are pumped into the upper inlet of the extraction tower, and the CS 2 into the lower inlet of the extraction tower, CS 2 No stabilizer was added to the mixture, the crude insoluble sulfur was mixed with CS 2 The ...

Embodiment 2

[0039] In the laboratory according to the characteristics of the present invention prepared a figure 1 A small-scale experimental device, using the gasification method to heat sulfur to 600 ° C, then quenching in aqueous solution, and then drying and solidifying to obtain crude insoluble sulfur, in which the content of insoluble sulfur is 62%, and the crude insoluble sulfur is 5-10cm in length Block shape, width 1-2cm, use a small pulverizer to pulverize the crude insoluble sulfur in water, control the pulverization temperature not higher than 80°C, and filter with a filter to obtain a slurry of crude insoluble sulfur powder with a particle size of 100-400 mesh, and use a pump Squeeze the insoluble crude sulfur powder water slurry into the separation tank, reuse the separated water, then pump the solvent and sulfur powder slurry at the bottom of the separation tank into the upper inlet of the extraction tower, and separate the CS 2 into the lower inlet of the extraction tower,...

Embodiment 3

[0041] In the laboratory according to the characteristics of the present invention prepared a figure 1 A small-scale experimental device, using the gasification method by heating sulfur to 600 ° C, and then in the CS 2 Medium rapid cooling, and then dried and solidified to obtain crude insoluble sulfur, in which the insoluble sulfur content is 41%. The crude insoluble sulfur is in the form of lumps. Use a small water phase pulverizer to pulverize the crude insoluble sulfur in water, and control the pulverization temperature is not high at 80°C, and filter with a filter to obtain the insoluble crude sulfur powder slurry with a particle size of 100-400 mesh, pump the insoluble crude sulfur powder slurry into the separation tank, reuse the separated water, and then pump the bottom of the separation tank The solvent and sulfur powder slurry are injected into the upper inlet of the extraction tower, and the CS 2 into the lower inlet of the extraction tower, CS 2 Add stabilizer, i...

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Abstract

The invention provides a separation and extraction method for sulfur powder in water during preparation of insoluble sulfur. The method is characterized by comprising the following steps: pumping slurry formed by water and crude insoluble sulfur powder into a separation tank by using a pump, wherein an extraction solvent is added into the separation tank, settling sulfur particles to enter the solvent, pumping a mixture of the solvent and the sulfur particles into the upper part of an extraction tower by using a pump, pumping the solvent to the lower part of the extraction tower by using a pump, allowing the solvent flowing out from the top of the extraction tower to return to the separation tank, performing evaporation on part of the solvent to recover the solvent to obtain soluble sulfur, adding a stabilizer into insoluble sulfur and a solvent flowing out from the bottom of the extraction tower, performing filtration, and performing evaporation to recover the solvent and obtain the purified insoluble sulfur.

Description

technical field [0001] The invention belongs to the field of non-metallic elements and their compounds, and relates to a method for separating and extracting sulfur powder in water during the preparation of insoluble sulfur. The International Patent Classification belongs to C01B 17 / 12. Background technique [0002] Insoluble sulfur (Insoluble sulfur, referred to as IS), also known as μ-type sulfur, is a long-chain polymeric sulfur formed by ordinary sulfur through ring-opening polymerization. It is named because it is insoluble in carbon disulfide. Insoluble sulfur is mainly used as a vulcanizing agent for rubber and is widely used in the production of radial tires. It has high dispersibility and high temperature stability. It can effectively avoid blooming of rubber when used in rubber mixing, and the vulcanization effect is good. With the increasing domestic demand for radial tires, the demand for insoluble sulfur is also increasing. The production of insoluble sulfur w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12C01B17/02B01D11/02B01D36/00
CPCC01B17/12C01B17/0232C01B17/0205B01D11/0288B01D36/006
Inventor 王延臻段红玲宋春敏张安高丽张珩锴
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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