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A process and system for continuous production of rubber vulcanization accelerator tetramethylthiuram disulfide

A technology of tetramethylthiuram disulfide and rubber vulcanization, which is applied in the direction of organic chemistry, can solve the problems of low production efficiency and heavy pollution, and achieve the effects of improving output efficiency, uniform distribution, and avoiding quality fluctuations

Active Publication Date: 2020-07-10
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to overcome the problems of low production efficiency and heavy pollution in the prior art, and then provide a process and system for producing tetramethylthiuram disulfide with high production efficiency and environmental protection

Method used

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  • A process and system for continuous production of rubber vulcanization accelerator tetramethylthiuram disulfide
  • A process and system for continuous production of rubber vulcanization accelerator tetramethylthiuram disulfide

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Embodiment 1

[0030] This embodiment provides a system for continuous production of rubber vulcanization accelerator tetramethylthiuram disulfide, see figure 1 shown, including:

[0031] Material delivery components, including solvent delivery components, dimethylamine delivery components and carbon disulfide delivery components;

[0032] a material mixing component, the input port of which is connected to the output end of the conveying component;

[0033] A tower reactor, the input port of which is connected to the output end of the material mixing assembly, and the hydrogen peroxide delivery assembly is communicated with the tower reactor;

[0034] An eluting device, the input end of which is connected to the output end of the tower reactor.

[0035] The solvent delivery component includes a solvent metering pump 1, and a solvent flow valve group 4, the carbon disulfide delivery component includes a carbon disulfide metering pump 3, and a carbon disulfide flow valve group 6, and the di...

Embodiment 2

[0037] The present embodiment provides a kind of continuous production rubber vulcanization accelerator tetramethyl thiuram disulfide technology, comprises the steps:

[0038] S1. Transport dimethylamine, carbon disulfide and solvent to the mixing tank for ionization reaction to obtain a mixed solution. The molar ratio of dimethylamine to carbon disulfide is 0.8:1, and the mass ratio of solvent to dimethylamine is 3:1; Said solvent is not limited to methyl alcohol, ethanol or isopropanol, and the solvent of the present embodiment is ethanol;

[0039] S2. After the mixed solution enters the tower reactor, the hydrogen peroxide with a concentration of 8wt% enters the tower reactor in three sections, and the reaction temperature is controlled at 20° C. to obtain the reaction solution; wherein, the molar ratio of hydrogen peroxide to dimethylamine 1:0.5;

[0040] S3. When the reaction liquid begins to overflow from the top of the tower reactor to the middle of the reaction liquid...

Embodiment 3

[0043] The present embodiment provides a kind of continuous production rubber vulcanization accelerator tetramethyl thiuram disulfide technology, comprises the steps:

[0044] S1. Transport dimethylamine, carbon disulfide and ethanol to the mixing tank for ionization reaction to obtain a mixed solution. The molar ratio of dimethylamine to carbon disulfide is 0.95:1, and the mass ratio of ethanol to dimethylamine is 6:1;

[0045] S2. After the mixed solution enters the tower reactor, the hydrogen peroxide with a concentration of 20wt% enters the tower reactor in three sections, and the reaction temperature is controlled at 35° C. to obtain the reaction solution; wherein, the molar ratio of hydrogen peroxide to dimethylamine 0.6:1;

[0046] S3. When the reaction liquid begins to overflow from the top of the tower reactor to the middle of the reaction liquid storage tank, start feeding to the eluting device, the mother liquor enters the distillation process, and the primary and s...

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Abstract

The invention relates to the technical field of production of vulcanizing agents, and discloses a process for continuously producing tetramethyl thiuram disulfide as thiofide. The process comprises the following steps: respectively delivering dimethylamine, carbon disulfide and a solvent into a mixing tank and carrying out ionization reaction to obtain mixed liquor; after feeding the mixed liquor into a tower type reactor, adding an oxidizing agent at the operation temperature of 20-60 DEG C to oxidize the mixed liquor in a segmented manner to obtain reaction liquid; and carrying out solid-liquid separation on the reaction liquid to obtain a solid material. The invention further discloses preparation equipment based on the process. The technical problems that the production efficiency is low and pollution is high in the prior art are solved, and the process and system for continuously producing the tetramethyl thiuram disulfide as the thiofide are provided.

Description

technical field [0001] The invention belongs to the technical field of vulcanizing agent production, and in particular relates to a process and system for continuously producing tetramethylthiuram disulfide, a rubber vulcanization accelerator. Background technique [0002] Tetramethylthiuram disulfide is an overspeed accelerator for rubber vulcanization. It is mainly used in the manufacture of tires, inner tubes, rubber shoes, medical supplies, cables, industrial rubber products, etc. It can also be used as a fungicide or insecticide in agriculture. As a lubricating oil additive. There are basically three production routes for vulcanization accelerator tetramethylthiuram disulfide, sodium salt chlorine oxidation method, sodium salt hydrogen peroxide oxidation method and solvent direct hydrogen peroxide oxidation route. At present, the sodium salt chlorine gas oxidation route produces a large amount of Salt wastewater and tail gas containing chlorine and dimethylamine are di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C333/32
CPCC07C333/32
Inventor 徐均吕桂中徐清华薛香菊周福鹏
Owner SHANDONG SUNSINE CHEM
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