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Method for preparing high-purity and high-dispersibility insoluble sulfur

A high-dispersion, high-purity technology, applied in the direction of sulfur preparation/purification, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of reduced dispersion, poor performance, etc., to reduce recycling steps and avoid use , The effect of reducing the consumption of resources and energy

Inactive Publication Date: 2016-07-13
SHANGHAI JINGHAI ANHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the same quality of insoluble sulfur added, the insoluble sulfur products with larger particle sizes will have poorer performance of vulcanized rubber products. This patent uses this method to improve the performance of the product, but the insoluble sulfur with smaller particle sizes is relatively larger than the insoluble sulfur with larger particle sizes. Particles are not easy to disperse in rubber, so the patent improves product performance while reducing dispersibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the high-purity and high-dispersibility insoluble sulfur of the present embodiment comprises the following steps:

[0030] (1) Melting and heating: heat the raw material sulfur to melt sulfur, and control the temperature at 130°C; add alum powder equivalent to 0.8% of sulfur weight and 1% nano-silicon dioxide, stir for 15min, and melt the melt with a sulfur metering pump Put it into the heating tank, raise the temperature to 300°C, and keep it warm for 0.5h;

[0031] (2) Atomization, quenching: after atomizing the high-temperature sulfur liquid obtained above, spray rapidly into the quenching liquid containing a stabilizer for rapid cooling to obtain a suspension;

[0032] (3) Curing: place the suspension obtained in step (2) in an oven at 40°C for curing and drying;

[0033] (4) Extraction and filtration: the solidified and dried material is washed and extracted by carbon disulfide multiple times in the container, and the solvent containing s...

Embodiment 2

[0046] The preparation method of the high-purity and high-dispersibility insoluble sulfur of the present embodiment comprises the following steps:

[0047] (1) Melting and heating: heat the raw material sulfur to melt sulfur, and control the temperature at 140°C; add alum powder equivalent to 1.0% of sulfur weight and 1% nano-silicon dioxide, stir for 18 minutes, and melt the melt with a sulfur metering pump Put it into the heating tank, raise the temperature to 350°C, and keep it warm for 3 hours;

[0048] (2) Atomization, quenching: after atomizing the high-temperature sulfur liquid obtained above, spray rapidly into the quenching liquid containing a stabilizer for rapid cooling to obtain a suspension;

[0049] (3) Curing: place the suspension obtained in step (2) in an oven at 50°C for curing and drying;

[0050](4) Extraction and filtration: the solidified and dried material is washed and extracted by carbon disulfide multiple times in the container, and the solvent conta...

Embodiment 3

[0063] The preparation method of the high-purity and high-dispersibility insoluble sulfur of the present embodiment comprises the following steps:

[0064] (1) Melting and heating: heat the raw material sulfur to melt sulfur, and control the temperature at 150°C; add alum powder equivalent to 1.5% of sulfur weight and 2% nano-silica, stir for 30min, and melt the melt with a sulfur metering pump Put it into the heating tank, raise the temperature to 450°C, and keep it warm for 3 hours;

[0065] (2) Atomization, quenching: after atomizing the high-temperature sulfur liquid obtained above, spray rapidly into the quenching liquid containing a stabilizer for rapid cooling to obtain a suspension;

[0066] (3) Curing: place the suspension obtained in step (2) in a 60°C oven for curing and drying;

[0067] (4) Extraction and filtration: the solidified and dried material is washed and extracted by carbon disulfide multiple times in the container, and the solvent containing soluble sul...

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Abstract

The invention discloses a method for preparing high-purity and high-dispersibility insoluble sulfur, and relates to the field of fine chemical engineering.The method includes steps of (1), melting and heating raw materials; (2), atomizing and quenching the raw materials; (3), solidifying the raw materials; (4), extracting and filtering the raw materials; (5), dispersing the raw materials; (6), coating the raw materials; (7), drying the raw materials and filling the raw materials with oil.The method has the advantages that disperse materials in molten states are added into the raw materials in a mist spray mode instead of an organic solvent melting mode before the raw materials are filled with the oil, accordingly, organic solvents can be omitted, steps for recycling the organic solvents can be omitted, resource and energy consumption can be reduced, and the purity, the high heat stability and the dispersibility of the high-purity and high-dispersibility insoluble sulfur prepared by the aid of the method can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method for preparing high-purity and high-dispersion insoluble sulfur. Background technique [0002] Insoluble Sulfur (Insoluble Sulfur), molecular formula: Su, is a non-toxic, flammable yellow powder, named for its insolubility in carbon disulfide. It is obtained by thermal polymerization of ordinary sulfur. The number of sulfur atoms in the molecular chain is as high as 108 or more. It has the viscoelasticity and molecular weight distribution of high polymers. Therefore, it is also called elastic sulfur or polymeric sulfur. It belongs to inorganic polymer chemical raw materials. [0003] As an advanced accelerator and vulcanizing agent in the rubber industry, insoluble sulfur is widely used in the manufacture of tires and other rubber composite products, such as tire carcass compounds, buffer compounds, white sidewall compounds, retreads, rubber hoses It can also be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12
CPCC01B17/12Y02P20/10
Inventor 陈杰胡建敏
Owner SHANGHAI JINGHAI ANHUI CHEM
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