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A device for continuous production of rubber vulcanization accelerator diphenylguanidine and production method thereof

A technology of rubber vulcanization and accelerators, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc. It can solve problems such as inaccurate control of reaction temperature, uneven stirring of reaction solution, yellowish and darker appearance of products, etc. Achieve the effects of improving equipment utilization efficiency, avoiding quality fluctuations, and reducing equipment investment

Active Publication Date: 2019-09-24
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen oxidation route is currently the main route for producing diphenylguanidine, but it also has certain limitations. Firstly, the appearance of its product is obviously yellowish and dark; Potential safety hazards; this is mainly due to the shortcomings of the traditional tank reactor, such as the heat released by the reaction cannot be released in time, the reaction temperature cannot be accurately controlled, and the reaction solution is not stirred uniformly, which may easily cause side reactions and production safety problems

Method used

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  • A device for continuous production of rubber vulcanization accelerator diphenylguanidine and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment comprises diphenylthiourea, ammonia-water mixed liquid metering pump 1, catalyst peristaltic metering pump 2, pipeline reactor 4, preheater 5, oxygen compressor 3, gas-liquid separator 6, gas-liquid washing tower 7, Continuous filtering device 8, ammonia water receiver 9. Diphenylthiourea, ammonia-water mixed solution metering pump 1 is connected to the bottom of pipeline reactor 4 through mixed solution pipeline 10, and mixed solution pipeline 10 is provided with diphenylthiourea, ammonia-water mixed solution flow regulating valve group 11; Catalyst peristaltic metering pump 2 is connected to the bottom of the pipeline reactor 4 through the catalyst pipeline 12, and the catalyst flow regulating valve group 13 is provided on the catalyst pipeline 12; the oxygen compressor 3 is connected to the bottom of the pipeline reactor 4 through the oxygen pipeline 14, and the oxygen pip...

Embodiment 2

[0039] Adopt the equipment shown in embodiment, the production method of continuous production rubber vulcanization accelerator diphenyl guanidine comprises:

[0040] Make diphenylthiourea and ammonia water at a molar ratio of 1:8, and the concentration of ammonia water at 20% to make a slurry, and use a metering pump at a rate of 1m per hour. 3 The amount of feed is pumped into the pipeline reactor, the catalyst is made into a 30% aqueous solution, and the peristaltic metering of 0.34L per hour is pumped into the pipeline reactor, and the new oxygen pressure is adjusted to 0.45Mpa, and the reactor is slowly boosted, and the pipeline reaction is opened at the same time When the steam in the jacket of the device is heated up to 50°C, the pressure of the belt system begins to drop. When the temperature starts to rise, change the heating steam to circulating water in time, and continue to pass oxygen. When the liquid level appears in the belt gas-liquid separator, when the pressur...

Embodiment 3

[0042] Adopt the equipment shown in embodiment, the production method of continuous production rubber vulcanization accelerator diphenyl guanidine comprises:

[0043] Make a slurry of diphenylthiourea and ammonia water at a molar ratio of 1:5 and a concentration of ammonia water of 30%, and use a metering pump at a rate of 1m per hour. 3The amount of feed is pumped into the pipeline reactor, the catalyst is made into a 30% aqueous solution, and the peristaltic metering of 0.34L per hour is pumped into the pipeline reactor, and the new oxygen pressure is adjusted to 0.45Mpa, and the reactor is slowly boosted, and the pipeline reaction is opened at the same time The steam in the jacket jacket is heated to 55°C, and the system pressure begins to drop. When the temperature starts to rise, change the heating steam to circulating water in time, and continue to pass oxygen. When the liquid level appears in the belt gas-liquid separator, when the pressure rises to 0.4Mpa, Turn on the ...

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Abstract

The invention belongs to the technical field of production of a rubber vulcanization accelerator diphenylguanidine and particularly relates to a device and a production method for continuously producing rubber vulcanization accelerator diphenylguanidine. The device for continuously producing the rubber vulcanization accelerator diphenylguanidine comprises a diphenylthiourea and ammonium hydroxide mixed solution metering pump, a catalyst peristalsis metering pump, a pipeline type reactor, a preheater, an oxygen compressor, a gas-liquid separator, a gas-liquid washing tower, a continuous filtering device and an ammonium hydroxide receiver. According to the process, sealed continuous equipment is adopted for producing the rubber vulcanization accelerator diphenylguanidine, so that volatilization of materials in the process is avoided, and the environment is protected while the materials are saved; instant mixing of the materials is realized, the problem that by products are easily generated in a traditional still reaction due to excess ratio of local materials is solved, and the production efficiency is greatly improved; what is more important, after continuous production is adopted, due to small size of equipment, materials in a reaction system of a production site in the same time unit are greatly reduced, and safety risk is greatly reduced.

Description

[0001] (1) Technical field [0002] The invention belongs to the technical field of production of rubber vulcanization accelerator diphenylguanidine, in particular to a device for continuously producing rubber vulcanization accelerator diphenylguanidine and a production method thereof. [0003] (2) Background technology [0004] Diphenylguanidine is a medium-speed accelerator for rubber vulcanization, and can be used as an activator for thiazole, thiuram and sulfenamide accelerators. It is used for continuous vulcanization when used together with accelerators DM and TMTD. Has anti-aging properties. Commonly used in natural rubber and synthetic rubber, mainly used in the manufacture of tires, rubber sheets, rubber shoes and other rubber industrial products. [0005] There are basically three production routes for vulcanization accelerator DPG, lead oxide route, cyanogen chloride route and oxygen oxidation route. At present, lead oxide route and cyanogen chloride route have bee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C277/08C07C279/18
Inventor 苗静赵峰薛香菊沙德昌
Owner SHANDONG SUNSINE CHEM
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