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

A technology of tetramethylthiuram disulfide and rubber vulcanization, which is applied in organic chemistry and other fields, and can solve problems such as large investment, hidden dangers, safety and environmental protection

CN107739325BActive Publication Date: 2020-10-20SHANDONG SUNSINE CHEM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-10-20

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Abstract

The invention discloses equipment and technology for continuously producing a rubber vulcanization accelerator tetramethyl thiuram disulfide, and relates to the technical field of fine chemical engineering products. The equipment comprises a solvent tank, a dimethylamine tank and a carbon disulfide tank, wherein the solvent tank, the dimethylamine tank and the carbon disulfide tank are connected with a feeding hole in the upper end of a mixing tank through pipelines respectively; a discharging hole in the lower end of the mixing tank is connected with a feeding hole in the lower end of a towerreactor through a pipeline. The equipment also comprises a hydrogen peroxide tank; a discharging hole in the lower end of the hydrogen peroxide tank is communicated with the side wall of the tower reactor through a sectional pumping device; a discharging hole in the upper part of the tower reactor is connected with a feeding hole in the upper end of a reaction liquid storage tank through a pipeline; and the lower end of the reaction liquid storage tank is connected with a reverse elution device through a pipeline. The rubber vulcanization accelerator tetramethyl thiuram disulfide can be produced continuously.
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Description

technical field

[0001] The invention relates to the technical field of fine chemical products, in particular to an equipment and process for continuously producing tetramethylthiuram disulfide, a rubber vulcanization accelerator. Background technique

[0002] Tetramethylthiuram disulfide is an ultra-fast accelerator for rubber vulcanization. It is a thiazole accelerator and can be used in combination with other accelerators, usually in combination with the accelerator MBT. 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 fungicides and insecticides in agriculture, and can also be used as lubricating oil additives.

[0003] There are basically three production methods for vulcanization accelerator tetramethylthiuram disulfide: sodium salt chlorine oxidation, sodium salt hydrogen peroxide oxidation and organic solvent direct hydrogen peroxide oxidation. At present, the s...

Examples

specific Embodiment approach 2

[0044] Specific embodiment two: according to the steps adopted in the technique of the above-mentioned continuous production of rubber vulcanization accelerator tetramethylthiuram disulfide, the solvent is used at 2000L / h, dimethylamine is at 280L / h, and carbon disulfide is at a flow rate of 140L / h Pump into the mixing tank 4 through the static mixer 19, and pump into the tower reactor 5 with a metering pump while maintaining a certain liquid level, and the hydrogen peroxide in the hydrogen peroxide tank 6 enters the tower reactor in three stages at a flow rate of 140 L / h , keep the reaction temperature at 45°C, after the reaction, the solid separated by the reverse elution device 9 is dried by drying equipment, and the material is quantified for 8 hours, and the finished product of rubber vulcanization accelerator tetramethylthiuram disulfide is produced in total The amount is 2.04 tons, and the recovery rate is 96% based on dimethylamine, and the initial melting point of the ...