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Process system capable of continuously producing methylbenzotriazole (TTA) and production method

A technology of tolylbenzotriazole and process system, which is applied in the field of chemical product manufacturing, can solve problems such as high environmental protection pressure, unguaranteed quality, and difficult survival, so as to reduce product energy consumption, realize a virtuous cycle, and ensure product quality Effect

Active Publication Date: 2013-10-30
GANSU LIHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only does it lead to uneven product quality, but the quality cannot be guaranteed
And cause low production capacity, high energy consumption, serious environmental pollution, poor safety
Therefore, enterprises are often small in scale, with small profits, great pressure on environmental protection, and difficult to survive.

Method used

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  • Process system capable of continuously producing methylbenzotriazole (TTA) and production method
  • Process system capable of continuously producing methylbenzotriazole (TTA) and production method
  • Process system capable of continuously producing methylbenzotriazole (TTA) and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] According to the mass ratio of 1:0.4, the process water and solid sodium nitrite are sent into the sodium nitrite dissolving kettle, and steam is introduced to raise the temperature while stirring, and the temperature of the sodium nitrite dissolving kettle is raised to 70°C to make the sodium nitrite Dissolve completely, and form sodium nitrite solution in the sodium nitrite dissolution kettle; according to the mass ratio of 0.6:1, the ortho-toluenediamine and sodium nitrite solutions are respectively pumped into the reaction kettle with a high-pressure metering pump, and the heat transfer oil is turned on to raise the temperature pressure, to increase the temperature and pressure inside the reactor, and carry out the reaction under the condition that the internal pressure of the reactor is 5.0MPa and the temperature is 300°C: the product generated by the reaction in the reactor enters the reactor protector, and further enters the reactor protector. Fully react, the rea...

Embodiment 2

[0082] According to the mass ratio of 1:0.7, process water and solid sodium nitrite are sent into the sodium nitrite dissolving tank, while stirring, steam is introduced to raise the temperature, and the temperature of the sodium nitrite dissolving tank is raised to 80°C to completely dissolve the sodium nitrite. Dissolved to form a sodium nitrite solution in the sodium nitrite dissolution kettle; according to the mass ratio of 0.5:1, the ortho-toluenediamine (0-TDA) and sodium nitrite solution were pumped into the reaction kettle with a high-pressure metering pump, and the reaction The kettle is a medium-pressure reactor, and the heat conduction oil is turned on to increase the temperature and pressure to increase the temperature and pressure inside the reactor. The reaction is carried out under the conditions that the internal pressure of the reactor is 6.0MPa and the temperature is 250°C: the products generated by the reaction in the reactor enter the reaction The reactor pr...

Embodiment 3

[0088] According to the mass ratio of 1:0.5, the process water and solid sodium nitrite are sent into the sodium nitrite dissolving kettle, and steam is introduced into the sodium nitrite dissolving kettle while stirring, and the temperature of the sodium nitrite dissolving kettle is raised to 75°C to completely dissolve the sodium nitrite. Dissolve and form sodium nitrite solution in the sodium nitrite dissolution kettle; according to the mass ratio of 0.4:1, the ortho-toluenediamine and sodium nitrite solutions are pumped into the reaction kettle by high-pressure metering pump, and the reaction kettle is a medium-pressure reaction Reactor, turn on the heat conduction oil to increase the temperature and pressure, so that the temperature and pressure inside the reactor can be increased, and the reaction is carried out under the conditions of the internal pressure of the reactor at 5.5MPa and the temperature at 275°C: the product generated by the reaction in the reactor enters th...

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Abstract

The invention discloses a process system capable of continuously producing methylbenzotriazole (TTA) and a production method. The system comprises a sodium nitrite dissolution kettle, a reaction kettle, a reactor protector, an acidification kettle, a liquid-liquid separation tank, a water washing kettle, a dehydration tower, a rectification tower, a product receiving groove, a product cooling disc, a product crushing machine and a product pelleting machine which are connected with one another sequentially, wherein the reaction kettle and the acidification kettle are connected with an alkaline washing tower; the liquid-liquid separation tank is connected with a waste water cooling groove; the waste water cooling groove is connected with a water steaming kettle; the water steaming kettle is connected with a condenser and a centrifugal machine respectively; the condenser is connected with the sodium nitrite dissolution kettle and the water washing kettle respectively; and the rectification tower is connected with a front fraction storage groove, a vacuum system and a residue concentration kettle respectively. The TTA is prepared from sodium nitrite and ortho-tolylenediamine through a series of treatment steps, so the TTA can be continuously produced, the product quality is guaranteed, the yield of the products is greatly increased, the energy consumption of the products is reduced, and environmental pollution is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical product manufacturing, and relates to a process system capable of continuously producing tolyl benzotriazole (TTA); the invention also relates to a method for producing tolyl benzotriazole by using the process system. Background technique [0002] At present, when using the existing process system to produce tolyl benzotriazole, both in the reaction part and in the rectification part, batch operation is adopted. Not only does it lead to uneven product quality, but the quality cannot be guaranteed. Moreover, it causes low production capacity, high energy consumption, serious environmental pollution, and poor safety. Therefore, enterprises are often small in scale, have small profits, have great pressure on environmental protection, and find it difficult to survive. Contents of the invention [0003] In order to overcome the above-mentioned problems in the prior art, the object of the present i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D249/18
Inventor 杜永林岳建龙
Owner GANSU LIHENG NEW MATERIAL CO LTD