A method for improving the dispersibility of insoluble sulfur

A dispersive, sulfur technology, applied in the preparation/purification of sulfur, can solve the problems of a large amount of solvent washing, increase the ash content of the product, and exceed the ash content of the product, so as to reduce the consumption of resources and energy, improve the filling and sealing effect, reduce the The effect of the recycling step

Active Publication Date: 2017-07-04
SHANDONG YANGGU HUATAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, when sulfur is melted in the early stage, substances to improve dispersibility are added, which is likely to be washed by a large amount of solvent in the later extraction process, and most of the dispersant substances added are dissolved into the solvent, which affects the use effect of the dispersant
[0006] CN1033303874A adds the alum powder of sulfur mass 1-2% to improve final product dispersibility when molten sulfur, but alum can enter product at last, can obviously increase the ash content of product, causes product ash content to exceed standard
This patent uses an organic solvent to dissolve the coating agent to improve product dispersibility. It is necessary to recycle the organic solvent and increase the drying cost of the product, so the production cost is relatively high; The environment causes pollution, which is not conducive to large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 4,000 kg of sieved insoluble sulfur powder into a jacketed horizontal twin-ribbon mixer, and melt 62# paraffin (melting point 62°C) through the The submerged pump, mass flow meter and nozzle of the insulation jacket quantitatively add 60 kg into the mixer, the paraffin temperature is 70°C, and the opening of the valve is adjusted to control the addition time of the molten paraffin to 10 minutes. The stirring shaft and the double-layer ribbon of the stirring mixer are hollow. While adding paraffin, the cooling circulating water is passed through the stirring shaft, double-layer ribbon and the jacket of the mixer to cool down the material in the mixer, and the temperature of the material is kept at 30- 40°C. Continue to stir at this temperature for 20 minutes after the paraffin wax is added, then add 940 kg of naphthenic oil into the mixer through the naphthenic oil nozzle for filling and mixing, and the oil filling is completed after mixing for 30 minutes.

[0028] ...

Embodiment 2

[0035] Add 4000 kilograms of insoluble sulfur powders through sieving in the horizontal twin-screw ribbon stirring mixer with jacket, under the stirring speed of 29 revs / min, the molten state rosin glyceride that temperature is 90 ℃ passes through with The submerged pump, mass flow meter and nozzle of the insulation jacket quantitatively add 80 kg into the mixer, and the opening of the valve is adjusted to control the addition time of rosin glyceride for 10 minutes. The stirring shaft and double-layer ribbon of the stirring mixer are hollow. While adding rosin glyceride, the cooling circulating water is passed through the stirring shaft, double-layer ribbon and mixer jacket to cool down the material, and the temperature of the material is kept at 30-40°C. . Continue to stir at this temperature for 20 minutes after the rosin glyceride is added, then add 920 kg of naphthenic oil into the mixer through the naphthenic oil nozzle for filling and mixing, and the oil filling is compl...

Embodiment 3

[0039] Add 4000 kg of sieved insoluble sulfur powder into a horizontal double-ribbon mixer with a jacket, and at a stirring speed of 29 rpm, the molten pentaerythritol stearate at a temperature of 70°C passes through A submerged pump with an insulating jacket, a mass flow meter and a nozzle quantitatively add 80 kilograms in the mixer, and the valve opening control pentaerythritol stearate addition time is 10 minutes. The stirring shaft and the double-layer ribbon of the stirring mixer are hollow. When pentaerythritol stearate is added, the cooling circulating water is passed through the stirring shaft, the double-layer ribbon and the jacket of the mixer to cool down the material, and the temperature of the material is kept at 30- 40°C. After pentaerythritol stearate was added, continue to stir at this temperature for 20 minutes, then add 920 kg of naphthenic oil into the mixer through the naphthenic oil nozzle for filling and mixing, and the oil filling was completed after mi...

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Abstract

The invention discloses a method for improving the dispersibility of insoluble sulfur. The method comprises the following steps: selecting an organic matter having the melt point or the softening point being 40-100 DEG C as a dispersible material; heating to enable the dispersible material to be kept a molten state before filling oil to the dispersible material; then, uniformly spraying the molten dispersible material onto the surface of the insoluble sulfur in a mist form; carrying out filled sealing on micropores on the surface of the insoluble sulfur; carrying out oil filling after the dispersible material and the insoluble sulfur are sufficiently mixed. According to the method disclosed by the invention, the use of an organic solvent can be avoided by defining and improving the melt point or the softening point of the dispersible material and adding the dispersible material at a molten state in a spraying manner before oil filling rather than an organic solvent dissolving manner, and recovery steps of the organic solvent are also reduced, so that the consumption of resources and energy sources is reduced; meanwhile, the method is simple and feasible, and is beneficial for improving the production efficiency.

Description

technical field [0001] The invention relates to a method for treating insoluble sulfur, in particular to a method for improving the dispersibility of insoluble sulfur. Background technique [0002] Insoluble sulfur is obtained by thermal polymerization of ordinary sulfur and is insoluble in carbon disulfide. As a high-grade accelerator and vulcanization crosslinking agent in the rubber industry, it has the functions of not blooming and improving the adhesion between layers of multi-layer rubber products. Strength, effectively reducing the scorching phenomenon of rubber materials during storage, etc. In the production of tires, especially in the production of automotive all-steel radial tires, it is an essential and important raw material. [0003] Compared with ordinary sulfur, the dispersibility of insoluble sulfur in rubber is poor, and the dispersibility directly affects the mechanical and wear resistance of rubber products. Therefore, the dispersibility is a key index ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/12
Inventor 王维民杜孟成魏承磊
Owner SHANDONG YANGGU HUATAI CHEM
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