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Preparation method of insoluble sulfur used for rubber

A soluble and rubber technology, applied in the field of preparation of insoluble sulfur for rubber, can solve the problems of lack of insoluble sulfur insoluble sulfur content, poor stability, low insoluble sulfur content, etc. The effect of the tendency to aggregate into rings

Inactive Publication Date: 2017-07-04
SHANGHAI JINGHAI ANHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The insoluble sulfur prepared by the prior art has the disadvantages of poor stability and low insoluble sulfur content, and there is no technical solution for how to improve the stability of insoluble sulfur and increase the content of insoluble sulfur

Method used

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  • Preparation method of insoluble sulfur used for rubber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preferably, the preparation method of insoluble sulfur for rubber comprises the following steps:

[0028] S1: Melting: Crushing the sulfur raw material and heating it to 120°C to turn the sulfur solid into a melt;

[0029] S2: Quenching: add anti-aging agent 264 to the molten sulfur in step S1, heat up to 210°C, and heat for 25 minutes. The mass ratio of anti-aging agent 264 to sulfur is 1:950; then quickly pour the high-temperature sulfur liquid into Rapid cooling in the quenching agent to obtain a suspension containing sulfur particles;

[0030] S3: solidification: the suspension in step S2 is placed in a reactor, continuously stirred and heated, and the temperature is controlled within the range of 65° C., and solidified for 140 minutes to obtain an insoluble sulfur crude product;

[0031] S4: Stirring and crushing: add dispersant, antioxidant and accelerator to the crude sulfur product in step S3, stir for 30 minutes under the condition of rotating speed of 600r / mi...

Embodiment 2

[0036] Preferably, the preparation method of insoluble sulfur for rubber comprises the following steps:

[0037] S1: Melting: Crushing the sulfur raw material and heating it to 125°C to turn the sulfur solid into a melt;

[0038] S2: Quenching: Add anti-aging agent 264 to the molten sulfur in step S1, heat up to 215°C, and heat for 30 minutes. The mass ratio of anti-aging agent 264 to sulfur is 1:980; then quickly pour the high-temperature sulfur liquid into Rapid cooling in the quenching agent to obtain a suspension containing sulfur particles;

[0039] S3: solidification: place the suspension in step S2 in a reactor, stir and heat continuously, control the temperature within the range of 72°C, and solidify for 180 minutes to obtain an insoluble crude sulfur product;

[0040] S4: Stirring and crushing: add dispersant, antioxidant and accelerator to the crude sulfur product in step S3, stir for 34min at a rotating speed of 680 / min, dry and pulverize to obtain crude sulfur com...

Embodiment 3

[0045] Preferably, the preparation method of insoluble sulfur for rubber comprises the following steps:

[0046] S1: Melting: Crushing the sulfur raw material and heating it to 130°C to turn the sulfur solid into a melt;

[0047] S2: Quenching: Add anti-aging agent 264 to the molten sulfur in step S1, heat up to 225°C, and heat for 35 minutes. The mass ratio of anti-aging agent 264 to sulfur is 1:1000; then quickly pour the high-temperature sulfur liquid into Rapid cooling in the quenching agent to obtain a suspension containing sulfur particles;

[0048] S3: solidification: the suspension in step S2 is placed in a reactor, continuously stirred and heated, and the temperature is controlled within the range of 80°C, and solidified for 240 minutes to obtain an insoluble sulfur crude product;

[0049] S4: Stirring and pulverization: add dispersants, antioxidants and accelerators to the crude sulfur product in step S3, stir for 38 minutes at a rotating speed of 760r / min, dry and pu...

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Abstract

The invention relates to the technical field of sulphur preparation, and more specifically relates to a preparation method of insoluble sulfur used for rubber. The preparation method comprises the following steps: fusion, quenching, solidification, stirring and crushing, extraction and drying, distillation and quenching, drying and oil charge. According to the invention, an anti-oxidant 1010, an anti-oxidant DLTP and an anti-oxidant 168 are added, the prepared product has stronger anti-oxidizability and prevents the insoluble sulfur from being oxidized, an antioxidant 264 and free radicals at two ends of the insoluble sulfur are coupled, long chain of the insoluble sulfur is fractured, the tendency for cyclo-depolymerization of the insoluble sulfur is alleviated; solubility parameter of toluene and naphthalene is very approached to the solubility parameter of sulphur, the polarity of toluene and naphthalene is low, after mixing the toluene and naphthalene, the solubility parameter and polarity of the mixed liquor can be adjusted, and the solubility parameter under condition that at the polarity is as small as possible is more approached to the solubility parameter of the sulphur. The content and heat stability of the insoluble sulfur are better than that of the insoluble sulfur prepared by contrast file.

Description

technical field [0001] The invention relates to the technical field of sulfur preparation, in particular to a method for preparing insoluble sulfur for rubber. Background technique [0002] Elemental sulfur is commonly known as sulfur, massive sulfur is light yellow massive knots, powder is light yellow powder, has a special odor, can be dissolved in carbon disulfide, insoluble in water. Industrial sulfur is yellow or light yellow, in block, powder, granular or flake form. There are many allotropes, orthorhombic sulfur, also known as rhombohedral sulfur or α-sulfur, is most stable below 95.5°C, with a density of 2.1g / cm3, a melting point of 112.8°C, and a boiling point of 445°C. It is brittle and difficult to conduct heat and electricity; Oblique sulfur, also known as β-sulfur, is stable above 95.5°, with a density of 1.96g / cm3; elastic sulfur, also known as γ-sulfur, is amorphous, unstable, and easily transformed into α-sulfur. Orthorhombic sulfur and monoclinic sulfur ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/12C08K13/02C08K3/06C08K5/13C08K5/09C08K5/134C08K5/372C08K5/526C08K5/17C08L25/06C08L91/06
CPCC01B17/12C08K3/06C08K5/09C08K5/13C08K5/1345C08K5/17C08K5/372C08K5/526C08K13/02C08L25/06C08L91/06
Inventor 陈杰胡建敏
Owner SHANGHAI JINGHAI ANHUI CHEM