Oil-filled insoluble sulfur and preparation method and application of sulfur as well as application of ionic liquid as stabilizer

An ionic liquid and sulfur technology, which is applied in the field of oil-filled insoluble sulfur and its preparation, can solve the problems of unsatisfactory stabilization effect of stabilizer for insoluble sulfur, and achieve the effects of avoiding inaccurate measurement, high stability and prolonging storage time.

Active Publication Date: 2015-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the invention is to overcome the technical problem that the stabilizing effect of the existing insoluble sulfur stabilizer is still unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The insoluble sulfur may be insoluble sulfur obtained by polymerizing raw sulfur by various common methods. In one embodiment, the method for preparing the insoluble sulfur includes: melt-polymerizing the raw material sulfur, and quenching the mixture obtained by the polymerization. Herein, "raw material sulfur" is opposite to insoluble sulfur, and refers to the raw material used to prepare insoluble sulfur, and it can be various raw material sulfur used to prepare insoluble sulfur.

[0029] Preferably, the polymerization is carried out in the presence of white carbon black, which can further improve the stability of the prepared insoluble sulfur. The amount of the white carbon black can be determined according to the amount of raw material sulfur. Specifically, relative to 100 parts by weight of the raw material sulfur, the amount of the white carbon black can be 0.01-1 parts by weight, preferably 0.01-0.5 parts by weight, more preferably 0.01-0.1 parts by weight, furthe...

Embodiment 1

[0044] (1) Melt polymerization

[0045] Put 2.0kg purity> 99.9% of industrial sulfur was added to a 2L reaction vessel, filled with nitrogen protection, heated to 140°C, kept for 20 minutes, and then added white carbon black (volume average particle size of 100nm). Among them, the amount of silica used is 0.02 parts by weight relative to 100 parts by weight of industrial sulfur. After stirring uniformly, the temperature was raised to 260°C and kept for 30 minutes to proceed the polymerization reaction.

[0046] (2)Quick cold

[0047] After the completion of the reaction, using high-pressure nitrogen as the carrier gas, spray the liquid mixture in the reaction kettle into a 10 kg ice water bath.

[0048] (3) Dry

[0049] Separate the solid mixture from the ice-water bath and place it in a blast drying oven at a temperature of 65°C for 24 hours.

[0050] (4) Extraction

[0051] After the dried solid mixture was crushed with a crusher, the solid particles with a particle size of not more t...

Embodiment 2

[0059] The oil-extended insoluble sulfur was prepared by the same method as in Example 1, except that in step (1), white carbon black was not used.

[0060] In the obtained oil-extended insoluble sulfur, the content of insoluble sulfur was 77% by weight. After testing, the obtained oil-extended insoluble sulfur has a stability of 74% at 105°C / 15min and a stability of 35% at 120°C / 15min; the prepared oil-extended insoluble sulfur is placed at 30°C for 2 months After that, the stability at 105°C / 15min was determined to be 72%, and the stability at 120°C / 15min was 34%.

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Abstract

The invention discloses oil-filled insoluble sulfur and a preparation method and an application of the sulfur and further provides an application of an ionic liquid as a stabilizer in the oil filling process of the insoluble sulfur. The ionic liquid is taken as the stabilizer in the oil filling process of the insoluble sulfur, and the formed oil-filled insoluble sulfur shows higher stability and still shows relative stability after being stored for a long time; as a result, the storage time of the insoluble sulfur is obviously prolonged. In addition, the ionic liquid serving as the stabilizer can be applied to the oil filling process at a relatively low temperature; on the one hand, inaccurate metering due to volatilization and even decomposition of the stabilizer at a high temperature is avoided, and on the other hand, the stabilizer is prevented from volatilization and even decomposition so that no toxic and harmful gases can be generated in the production process.

Description

Technical field [0001] The invention relates to an oil-extended insoluble sulfur and a preparation method and application thereof. The present invention also relates to the application of an ionic liquid as a stabilizer for an insoluble sulfur oil-extended process. Background technique [0002] Insoluble sulfur, also known as polymerized sulfur, is a long-chain polymer formed by ring-opening polymerization of common sulfur (ie, raw sulfur). It is named because it is insoluble in carbon disulfide. Unlike ordinary sulfur, insoluble sulfur has very little solubility in rubber. Therefore, insoluble sulfur is mainly used as a rubber vulcanizing agent and is widely used in the production of high-grade tires and other rubber products without worrying about blooming. There are two main methods for preparing insoluble sulfur: high temperature gas phase method and low temperature melting method. [0003] Insoluble sulfur is polymerized by ordinary sulfur. Both ends of the polymer chain form...

Claims

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Application Information

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IPC IPC(8): C01B17/12
CPCC01B17/12
Inventor 吴立报黄婉利胡伟庆刘清华李大念李金亮罗望群严俊王晨栋姚思涵
Owner CHINA PETROLEUM & CHEM CORP
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