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Insoluble sulfur preparation method

A sulfur and soluble technology, applied in the field of fine chemicals, can solve the problems of high iron ion content, high acid value, high thermal stability and other problems, and achieve the effect of high yield, good quality and not easy to agglomerate

Inactive Publication Date: 2007-06-27
王桃仙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Another object of the present invention is to effectively overcome the deficiencies of high iron ion content, high acid value, and high thermal stability of IS products at home and abroad

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0038]Please refer to the equipment used for implementing the method of the present invention shown in FIG. 3 . The raw material common sulfur with a content of 99.9% is fed into a melting tank, heated to 260°C, and kept at this temperature for 3 hours, so that the ring-opening of sulfur molecules proceeds with fusion reaction. Then slowly send the sulfur melt into the circulating quenching liquid tank for cooling. The quenching liquid is circulating water. After the sulfur bars are fully cooled, they are sent to the drying and curing room for curing and drying for 6 hours. The temperature is controlled at 40-50°C. . Then it is sent into a fully sealed multi-functional extraction kettle and pressed into the CS 2 The solution is submerged in the sulfur bar for 500-1000mm to extract 3 times. 1 hour each time, stirring for 10 minutes. Add stabilizer (CS 2 : butyl isosulfonate: sodium phosphate weight ratio=1: 0.01: 0.03), to submerge the extracted insoluble sulfur 500 ~ 1000m...

Embodiment 2

[0040] Please refer to the equipment used for implementing the method of the present invention shown in FIG. 3 . The raw material common sulfur with a content of 99.9% is fed into a melting tank, heated up to 270°C, and kept at this temperature for 3 hours, so that the ring-opening of the sulfur molecules proceeds with the fusion reaction. Then slowly send the sulfur melt into the circulating quenching liquid tank for cooling. The quenching liquid is circulating water. After the sulfur bars are fully cooled, they are sent to the drying and curing room for curing and drying for 8 hours. The temperature is controlled at 40-50°C . Then it is sent into a fully sealed multi-functional extraction kettle and pressed into the CS 2 The solution is submerged in the sulfur bar for 500-800mm to extract 3 times. 1 hour each time, stirring for 20 minutes. Add stabilizer (CS 2 : butyl isosulfonate: sodium phosphate weight ratio=1: 0.03: 0.08), to submerge the extracted insoluble sulfur 5...

Embodiment 3

[0042] Please refer to the equipment used for implementing the method of the present invention shown in FIG. 3 . The raw material common sulfur with a content of 99.9% is fed into a melting tank, heated up to 240°C, and kept at this temperature for 4 hours, so that the ring-opening of the sulfur molecules proceeds with the fusion reaction. Then slowly send the sulfur melt into the circulating quenching liquid tank for cooling. The quenching liquid is circulating water. After the sulfur bars are fully cooled, they are sent to the drying and curing room for curing and drying for 6 hours. The temperature is controlled at 40-50°C. . Then it is sent into a fully sealed multi-functional extraction kettle and pressed into the CS 2 The solution is submerged in the sulfur bar 600-900mm for extraction, and stirred for 30 minutes. Add stabilizer (CS 2 : butyl isosulfonate: sodium phosphate weight ratio = 1: 0.4: 0.1), to submerge the extracted insoluble sulfur 600 ~ 800mm, after 5 min...

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Abstract

The invention relates to preparation of insoluble sulfur in the art of fine chemicals, especially to a method for preparation of high-quality of insoluble sulfur. Heating the regular sulfur to 150- 400 Deg. C, the molecule of S8 cyclic-ring structure breaking into pure lineal molecule of different length, the chain separates two-end free radical, deading end with a special composite stabilizer (weight ratio of CS2: isobutyl sulfur: sodium phosphate= 1: 1.01-0.4: 0.01-0.1) to make it non-rotary in 100- 115Deg. C and the yield and quality of prepared insoluble sulfur high. Insoluble sulfur is first-choice vulcanizing agent.

Description

technical field [0001] The invention belongs to the preparation of insoluble sulfur in the field of fine chemicals, in particular to a method for preparing high-quality insoluble sulfur. Background technique [0002] Insoluble sulfur (Insoluble Sulfur), abbreviated as IS, refers to the insoluble carbon disulfide (CS) 2 ) of sulfur. The scientific name is the homopolymer of sulfur, also known as polysulfur (poly-sulfur). Its relative molecular mass is 3200-40000. Generally used as a vulcanizing agent for rubber. It is the preferred vulcanizing agent especially in steel wire radial tires and other rubber composite products, and it has been widely used. [0003] The molecular formula for ordinary sulfur is S 8 , forming a tortuous eight-membered spherical body, soluble in CS 2 , the relative molecular mass is 256, and the molecular structure is shown in Figure 1. When raised to a certain temperature, S 8 The rings are broken and connected end to end to form a long chain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/12
Inventor 王桃仙
Owner 王桃仙