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Method for continuous preparation of sulfur with high heat-stability and insolubility

A technology with high thermal stability and sulfur, which is applied in the preparation/purification of sulfur, can solve the problems of explosion, poor continuity, and easy combustion of insoluble sulfur, and achieve uniform product quality and avoid flammable and explosive effects

Active Publication Date: 2011-06-01
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is generally produced intermittently in a single batch, the continuity is not strong, and the product quality is unstable.
Combustion and explosion accidents are prone to occur when insoluble sulfur is crushed, and safety and environmental protection issues are very prominent

Method used

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  • Method for continuous preparation of sulfur with high heat-stability and insolubility
  • Method for continuous preparation of sulfur with high heat-stability and insolubility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for continuously producing high thermal stability insoluble sulfur of the present invention comprises the following steps:

[0026] a. Raw material sulfur is melted and heated up: the raw material sulfur, namely industrial sulfur, is heated in a sulfur melting tank for 4 hours with 0.3-0.4 Mpa water vapor, pumped into a sulfur heating tank, and heated to 600°C;

[0027] b. Composite solvent preparation: Add carbon disulfide, methylene chloride, and SS additives into the composite solvent circulation tank to form a composite solvent. The weight ratio is carbon disulfide: methylene chloride: SS=87:12:1, and the SS additive uses α- methyl styrene;

[0028] c. Reaction: In a reaction tank with a stirring device, first add the composite solvent cooled to 12°C to 70% of the volume, and directly pass high-temperature gaseous sulfur at 600°C into the composite solvent for contact reaction to generate insoluble sulfur. Continuously feed the composite solvent at 12°C ...

Embodiment 2

[0035] The method for continuously producing high thermal stability insoluble sulfur of the present invention comprises the following steps:

[0036] a. Raw material sulfur is melted and heated up: the raw material sulfur, namely industrial sulfur, is heated in a sulfur melting tank for 3 hours with 0.3-0.4 Mpa steam to melt, pumped into the sulfur heating tank through a pump, and heated to 550°C;

[0037] b. Composite solvent preparation: Add carbon disulfide, methylene chloride, and SS additives into the composite solvent circulation tank to form a composite solvent. The weight ratio is carbon disulfide: dichloromethane: SS = 78:5:0.01, and the SS additive uses isopentyl Diene;

[0038] c. Reaction: In a reaction tank with a stirring device, first add the composite solvent cooled to 5°C to 70% of the volume, and directly pass high-temperature gaseous sulfur at 550°C into the composite solvent for contact reaction to generate insoluble sulfur. Continuously feed the composite...

Embodiment 3

[0045] The method for continuously producing high thermal stability insoluble sulfur of the present invention comprises the following steps:

[0046] a. Raw material sulfur is melted and heated up: raw material sulfur, namely industrial sulfur, is heated in a sulfur melting tank for 5 hours with 0.3-0.4Mpa water vapor, pumped into a sulfur heating tank, and heated to 650°C;

[0047] b. Composite solvent preparation: Add carbon disulfide, methylene chloride, and SS additives into the composite solvent circulation tank to form a composite solvent. The weight ratio is carbon disulfide: dichloromethane: SS=95:20:2, and the SS additive is 1- Vinyl-3-cyclohexene;

[0048] c. Reaction: In a reaction tank with a stirring device, first add the composite solvent cooled to 20°C to 70% of the volume, and directly pass high-temperature gaseous sulfur at 650°C into the composite solvent for contact reaction to generate insoluble sulfur. Continuously feed the composite solvent at 20°C and sti...

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Abstract

od; the obtained product can satisfy the requirement of the belt tyre; the continual production is adopted to improve the labor productivity greatly which is higher than the intermittent method production level; the quality of the products is ensured to be consistency; the grinding in fluid is adopted to avoid the flammability and explosiveness problems caused by the grinding of the infusible sulfur powder; no <three wastes> is generated so that the producing method belongs to an environmental protection method.The invention provides a method of producing high thermostability insoluble sulfur continuously, which includes the steps that: a melting and heating-up; b the solvent preparation; c reaction; d separation, solidification, grinding and purification; e drying; f screening and oil filling; in the step b, the solvent is composite solvent and composed of carbon bisulfide, dichloromethane and SS auxiliary agent; the weight proportion of the three compositions is 78-95: 5-20: 0.01-2; wherein, the SS auxiliary agent is olefin with unsaturated bonds; the SS auxiliary agent can adopt the Alfa-methylstyrene, isoprene or 1-ethylene-3-cyclohexene. The method of producing high thermostability insoluble sulfur continuously has the advantages that the sulfur is produced through the composite solvent meth

Description

(1) Technical field [0001] The invention relates to a method for producing insoluble sulfur in the field of fine chemicals, in particular to a method for continuously producing insoluble sulfur with high thermal stability. (2) Background technology [0002] Insoluble sulfur, also known as polymeric sulfur, is insoluble in CS 2 So named, it is the necessary vulcanizing agent for radial tires. The demand for high thermal stability insoluble sulfur is growing rapidly with increasing radialization rate of tires. Therefore, in recent years, the research on insoluble sulfur with high thermal stability has attracted more and more attention. [0003] The methods of producing insoluble sulfur from ordinary sulfur can be divided into low-temperature melting method and high-temperature vapor phase method in terms of sulfur temperature, and can be divided into water method and solvent method in terms of quenching agent. [0004] Most domestic manufacturers and some Chinese patents us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/12
Inventor 徐承秋黎振球潘鹏勇刘经福吕桂中徐均王前文
Owner SHANDONG SUNSINE CHEM
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