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Method for producing insoluble sulfur

A production method and sulfur technology, applied in the preparation/purification of sulfur, etc., can solve problems such as unfavorable environmental protection, low melting point of products, easy corrosion of equipment, etc., and achieve continuous production, facilitate subsequent processing, and improve production efficiency. Effect

Active Publication Date: 2011-05-25
四川中信华诚化工科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

The gasification method has the advantage of high single-pass yield of insoluble sulfur because of the polymerization reaction at high temperature, but the gasification method is usually carried out at a very high temperature (above 700°C) and requires a large volume space, so the requirements for equipment are high, and the equipment is easy to corrode at high temperature
The low-temperature melting method performs cold extraction after polymerization at a lower temperature. Due to the low temperature, the conversion rate is low, the product purity is low, and the stability is poor. When water is used as a quenching agent, a large amount of waste water will be generated. Not conducive to environmental protection
The Chinese patent No. 03133587.X discloses a method for preparing insoluble sulfur by low-temperature melting-gas cooling, but this method consumes a large amount of gas for quenching and consumes a lot of energy, and its essence is also an indirect method. The production method, its follow-up treatment also needs complicated processes such as crushing, purification, drying, crushing, and screening, and the product quality cannot reach a high level, and its heat resistance is poor, and the product melting point is low

Method used

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  • Method for producing insoluble sulfur
  • Method for producing insoluble sulfur

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Embodiment 1

[0024] Such as figure 1 As shown, the solid sulfur is heated and melted in the sulfur melting tank at a temperature of 130°C, and the melted liquid sulfur is pumped into a heated pressure tank with a pressure of 1MPa through a plunger metering pump at a flow rate of 100kg / h for the first stage Heating, continuous heating to 420°C, under N 2 Under pressure, liquid sulfur continuously enters the internal heating header, which is composed of 8 pipe sections with closed ends, and electric heating tubes are inserted inside, which not only ensures safety, but also has higher thermal efficiency. It is 1.2MPa; under its own pressure, the liquid sulfur enters the pressure atomizing nozzle for atomization, and the atomized liquid sulfur and the high-speed rotating CS 2 Mixed cold extraction, the mixed emulsion enters the tower collector, and the tower collector is equipped with a multi-layer agitator to fully mix and dissolve the soluble sulfur. The temperature in the tower collector i...

Embodiment 2

[0026] Such as figure 1 As shown, the solid sulfur is heated and melted in the sulfur melting tank at a temperature of 150°C, and the melted liquid sulfur is pumped into a heated pressure tank with a pressure of 1 MPa through a plunger metering pump at a flow rate of 100 kg / h for the first stage Heating, continuous heating to 430°C, under N 2 Under pressure, liquid sulfur continuously enters the internal heating header, which is composed of 12 pipe sections with closed ends, and electric heating tubes are inserted inside, which not only ensures safety, but also has higher thermal efficiency. 0.8MPa; under its own pressure, the liquid sulfur enters the pressure atomizing nozzle for atomization, and the atomized liquid sulfur and the high-speed rotating CS 2 Mixed cold extraction, the mixed emulsion enters the tower collector, and the tower collector is equipped with a multi-layer agitator to fully mix and dissolve the soluble sulfur. The temperature in the tower collector is k...

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Abstract

The invention discloses a method for producing insoluble sulfur, and belongs to the field of inorganic fine chemical engineering. The production method comprises the following steps of: (1) melting and polymerization; (2) atomization and cold quenching (3) solidification; (4) centrifugal separation; (5) continuous drying; and (6) crushing, screening and charging oil to obtain a finished product. The method is a continuous production method; by the method, the yield of the product is improved; and the product has high purity and stable quality.

Description

technical field [0001] The invention relates to a production process method, in particular to a production method of insoluble sulfur. Background technique [0002] Insoluble sulfur, also known as polymeric sulfur, is obtained by thermal polymerization of ordinary sulfur and named after it is insoluble in carbon disulfide. The number of sulfur atoms in its molecular chain is as high as 108 or more, and it has the viscoelasticity and molecular weight of high polymers. Mainly used as an advanced accelerator and vulcanizing agent in the rubber industry, it is widely used in the production of tires and other rubber composite products. [0003] At present, there are mainly two methods for producing insoluble sulfur, namely, high-temperature gasification and low-temperature melting. The gasification method has the advantage of high single-pass yield of insoluble sulfur because of the polymerization reaction at high temperature, but the gasification method is usually carried out a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12
Inventor 何蕴琳攸路军
Owner 四川中信华诚化工科技有限公司
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