Method for improving quality of diphenylguanidine product

A technology of product quality and diphenylguanidine, applied in the field of diphenylguanidine production, can solve the problems of yellowish color and low purity, and achieve the effects of simple steps, high purity and convenient operation

Inactive Publication Date: 2016-02-24
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the accelerator diphenylguanidine produced by the lead oxide method or sodium cyanide method, the existing oxygen catalytic oxidation method has a yellowish or grayish color and low purity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put 700g of ammonia water into the oxidation kettle, the concentration of ammonia water is 16%, grind 100g of diphenylthiourea after sieving, start stirring, and after beating for 30min, heat the material to 60°C, and feed oxygen into the oxidation kettle. When the end point is reached, the oxygen supply is stopped, and the finished product of the accelerator diphenylguanidine is obtained through washing with water and drying. The accelerator diphenylguanidine has a white appearance and a purity of 98.0%.

Embodiment 2

[0014] Put 800g of ammonia water into the oxidation kettle, the concentration of ammonia water is 18%, grind 100g of diphenylthiourea after sieving, start stirring, after beating for 30min, heat the material to 70°C, and pass oxygen into the oxidation kettle, when the reaction When the end point is reached, the oxygen supply is stopped, and the finished product of the accelerator diphenylguanidine is obtained through washing with water and drying. The accelerator diphenylguanidine has a white appearance and a purity of 98.6%.

Embodiment 3

[0016] Put 900g of ammonia water into the oxidation kettle, the concentration of ammonia water is 20%, grind 100g of diphenylthiourea after sieving, start stirring, and after beating for 30min, heat the material to 80°C, and pass oxygen into the oxidation kettle. When the end point is reached, the oxygen supply is stopped, and the finished product of the accelerator diphenylguanidine is obtained through washing with water and drying. The accelerator diphenylguanidine has a white appearance and a purity of 99.0%.

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PUM

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Abstract

The invention relates to the technical field of diphenylguanidine production, and in particular discloses a method for improving the quality of a diphenylguanidine product. The method for improving the quality of the diphenylguanidine product takes diphenylthiourea as a raw material and is characterized by grinding the diphenylthiourea, throwing ammonium hydroxide and the diphenylthiourea into an oxidation pot according to the weight ratio being (7 to 10):1 for pulping, then pumping oxygen into the oxidation pot at the temperature of 55 to 85 DEG C, stopping oxygen pumping when a reaction reaches an end point, and then obtaining the diphenylguanidine product through washing and drying. The method provided by the invention is simple in step, convenient to operate, and easy to industrialize, the obtained product is white in appearance, and high in purity, the improvement of product quality is facilitated and the method is suitable for wide popularization and application.

Description

(1) Technical field [0001] The invention relates to the technical field of diphenylguanidine production, in particular to a method for improving the quality of diphenylguanidine products. (2) Background technology [0002] With the development of society and the continuous advancement of technology, green tires are constantly connected with green manufacturing. The green tires in people's eyes are not only the concept of "silicon tires", but the greening of the whole production process of tires is a strategic goal. Green tires are inseparable from the use of white carbon black (SiO2). As a non-fossil reinforcing material, white carbon black also has a very important contribution to environmental protection. The accelerator diphenylguanidine can significantly accelerate the silanization reaction between silica and Si69, reduce the Payne effect of the system, and improve the physical and mechanical properties of the rubber compound. [0003] The continuous development of gree...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C277/08C07C279/18
CPCC07C277/08
Inventor 薛香菊鲍翠许展吴艳萍沙德昌冯秀兰刘福坤
Owner SHANDONG SUNSINE CHEM
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