Insoluble sulfur stabilizing agent and preparation method thereof

A sulfur stabilizer and solubility technology, applied in the preparation/purification of sulfur, etc., can solve the problems of poor thermal stability of insoluble sulfur, poor dispersion effect of insoluble sulfur, expensive synthetic raw materials, etc., and achieve high stabilization effect, low price, and synthetic low cost effect

Inactive Publication Date: 2012-08-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned conventional stabilizers still have some disadvantages, such as expensive synthetic raw materials, low yield, large addition, poor dispersion effect in insoluble sulfur, poor thermal stability of the prepared insoluble sulfur, etc.
And for the synthesis of high-stability insoluble sulfur stabilizers, there are no relevant patent reports in China.

Method used

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  • Insoluble sulfur stabilizing agent and preparation method thereof
  • Insoluble sulfur stabilizing agent and preparation method thereof
  • Insoluble sulfur stabilizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 0.10mol sodium isoamyl xanthate to 80ml ethanol, start stirring after dissolving, and add 0.20mol CuSO dropwise under stirring 4 , Reacted in a water bath at 75°C for 3h. After the reaction is complete, extract with 120ml of carbon disulfide for 3 to 4 times, and distill the carbon disulfide out under atmospheric pressure after the extraction is complete. Then dry the liquid in the flask at a constant temperature of 60°C for 30-50 minutes. After drying, cool to obtain a light yellow oily liquid, weigh it, and calculate the yield.

Embodiment 2

[0027] Add 0.10mol potassium diethyldithiocarbamate to 120ml water, start stirring after dissolving, and add 0.15mol FeCl drop by drop under stirring 3 , and reacted in a water bath at 45°C for 5h. After the reaction is complete, extract with 120ml of carbon disulfide for 3 to 4 times, and distill the carbon disulfide out under atmospheric pressure after the extraction is complete. Then dry the liquid in the flask at a constant temperature of 60°C for 30-50 minutes. After the drying is completed, a light yellow oily liquid is obtained, which is cooled and weighed to calculate the yield.

Embodiment 3

[0029] Add 0.15mol O-(2-ethylhexyl)potassium dithiocarbonate to 140ml acetone, start stirring after dissolving, and add 0.15mol H 2 o 2 , and reacted in a water bath at 30°C for 6h. After the reaction is complete, extract with 120ml of carbon disulfide for 3 to 4 times, and distill the carbon disulfide out under atmospheric pressure after the extraction is complete. Then dry the liquid in the flask at a constant temperature of 60°C for 30-50 minutes. After the drying is completed, a light yellow oily liquid is obtained, which is cooled and weighed to calculate the yield.

[0030] The product yield analysis result in embodiment 1~3 sees the following table:

[0031] Product yield in each embodiment of table 1

[0032]

[0033] The results in the above table show that this type of stabilizer has a higher yield under their respective synthesis conditions.

[0034] Performance evaluation of the target product:

[0035] The stabilizers prepared in Examples 1-3 were applied ...

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Abstract

The invention discloses an insoluble sulfur stabilizing agent and a preparation method thereof. The insoluble sulfur stabilizing agent has a chemical structural formula as shown in the specification, and the molecular weight is 218-465, wherein R is C2-C20 linear-chain or branched-chain alkoxy or amino; and the stabilizing agent is generated through reaction by using an organic acid salt and an oxidant as raw materials and using water, acetone or fatty alcohol as a reaction medium. The stabilizing agent can be applied to an insoluble sulfur production process, can be uniformly dispersed in insoluble sulfur, can greatly improve the high-temperature stability of insoluble sulfur, and has the characteristics of mild process conditions, available raw materials, low synthesis cost, high product yield and the like.

Description

Technical field: [0001] The invention relates to an insoluble sulfur stabilizer and a preparation method thereof. Background technique: [0002] Insoluble sulfur (Insoluble Sulfur, referred to as IS) is a thermoplastic linear polymer homopolymer, which is an allotrope of sulfur. It is insoluble in carbon disulfide and is a rubber vulcanizing agent with excellent performance. It has many advantages in the production of radial tires, so it has become a special vulcanizing agent for the production of high-quality radial tires. With the development of the transportation and automobile industries, the demand for high-quality tires has led to an increasing demand for insoluble sulfur. However, insoluble sulfur is a metastable substance. When used alone, the stability will deteriorate with the increase of temperature, and the content will gradually decrease with the prolongation of storage time. [0003] Among the high-grade IS, the insoluble sulfur with the best quality in the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12
Inventor 刘东李丽吴贵阳田跃儒郑凯元赵阿珍王云霞李雯曲凤娇肖洒
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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