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Vulcanization accelerator DM production process

A technology of vulcanization accelerator and production process, which is applied in the direction of organic chemistry, can solve the problems of low melting point, complicated process, large amount of harmful gas, etc., and achieve the effect of high melting point, simple preparation process and simple process

Inactive Publication Date: 2012-11-14
SHANDONG KAIYUAN RUBBER & PLASTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention overcomes the disadvantages of complex raw material process, large amount of harmful gas and low melting point in the above-mentioned traditional process, and provides a new production process of vulcanization accelerator DM, which has the advantages of simple preparation process of raw material M sodium salt and no waste gas generation. and the advantage of a higher melting point

Method used

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  • Vulcanization accelerator DM production process
  • Vulcanization accelerator DM production process
  • Vulcanization accelerator DM production process

Examples

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Embodiment 1

[0026] Pour 1600L of water into the acidifier tank, turn on the stirring, turn on the jacket condensate, control the temperature of the tank below 60°C, add 400Kg of 98% sulfuric acid, 800L of 27% hydrogen peroxide, and make it into an oxidant for use. Pour 8000L M sodium salt solution into the oxidation kettle, start the oxidation kettle to stir, turn on the steam, control the temperature to 70-75°C, and drop 780L of oxidant to the DM at the end point at a rate of 300L / h, that is: take the oxidized feed liquid, Filter out a small amount of material, rinse with water 2-3 times, add 10ml of chloroform and shake in a glass test tube, add 2-3 drops of cobalt oleate to the material, if the material turns red, it means that the oxidation has reached the end. The material is then centrifuged and dried to obtain vulcanization accelerator DM (if 500Kg accelerator M is used, the equivalent yield is 495Kg), with a purity of 99.95%.

Embodiment 2

[0033] Pour 1700L of water into the acidifier tank, turn on the stirring, turn on the jacket condensate water, control the temperature of the tank below 60°C, add 400Kg of 98.3% concentrated sulfuric acid, and 750L of 30% hydrogen peroxide, and prepare it as an oxidant for use. Pour 8000L M sodium salt solution into the oxidation kettle, start the oxidation kettle to stir, turn on the steam, control the temperature at 70-75°C, and add the oxidant dropwise at a rate of 300L / h to the end, that is: take the oxidized material liquid, filter out a small amount After washing with water for 2-3 times, add 10ml of chloroform and shake in a glass test tube, add 2-3 drops of cobalt oleate to the material, if the material turns red, it means that the oxidation has reached the end. The material is centrifuged and dried to obtain vulcanization accelerator DM with a purity of 99.92%.

Embodiment 3

[0035] Pour 1500L of water into the acidifier tank, turn on the stirring, turn on the jacket condensate, control the temperature of the tank below 60°C, add 400Kg of 98% concentrated sulfuric acid, 850L of 25% hydrogen peroxide, and prepare it as an oxidant for use. Pour 8000L M sodium salt solution into the oxidation kettle, start the oxidation kettle to stir, turn on the steam, control the temperature at 70-75°C, and add the oxidant dropwise at a rate of 300L / h to the end, that is: take the oxidized material liquid, filter out a small amount After washing with water for 2-3 times, add 10ml of chloroform and shake in a glass test tube, add 2-3 drops of cobalt oleate to the material, if the material turns red, it means that the oxidation has reached the end. The material is centrifuged and dried to obtain vulcanization accelerator DM with a purity of 99.93%.

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Abstract

The invention relates to a vulcanization accelerator DM production process which mainly solves the problems of complicated raw material processing, large amount of harmful gas and low melting point in the traditional process. The process mainly comprises the following steps: adding water into concentrated sulfuric acid and oxydol, and preparing into an oxidizer for later use; pumping an accelerator M sodium salt solution into an oxidation kettle, controlling the temperature to be 70-75 DEG C, and dropwisely adding the oxidizer to the end point; and centrifuging the materials, and baking to obtain the vulcanization accelerator DM. According to the invention, the accelerator M sodium salt solution is used as the raw material and is an intermediate product for accelerating the M preparation process; and the two steps of acid dropping for neutralization and dewatering are omitted, so that the time consumed for production is reduced by about 6 hours, thereby saving labor resources and material resources. Besides, the process also has the advantages of no waste gas and high melting point.

Description

technical field [0001] The invention relates to a production process of a rubber auxiliary agent, in particular to a production process of a vulcanization accelerator DM. Background technique [0002] Substances that can shorten the vulcanization time, lower the vulcanization temperature, reduce the amount of vulcanizing agent and improve the physical and mechanical properties of rubber are called vulcanization accelerators. It can be divided into two categories: inorganic accelerators and organic accelerators, most of which are currently used are organic accelerators. There are many kinds of organic accelerators, mainly nitrogen- and sulfur-containing organic compounds, such as aldehydes and amines, guanidines, thiazoles, dithiocarbamates, thioureas, and sulfenamides. Vulcanization accelerator DM (chemical name: 2,2'dithiodibenzothiazole) is a thiazole accelerator with excellent performance. Its vulcanization critical temperature is higher than that of accelerator M, and i...

Claims

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Application Information

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IPC IPC(8): C07D277/78
Inventor 张建云
Owner SHANDONG KAIYUAN RUBBER & PLASTIC TECH CO LTD