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A kind of continuous ammoniation production process of 2,4-dinitroaniline

A technology of dinitroaniline and production process, which is applied in the field of continuous ammoniation production process of 2,4-dinitroaniline, can solve the problems of large pollution, high cost, low intermittent production efficiency and the like, and achieves low energy consumption and production efficiency high effect

Active Publication Date: 2016-03-16
LIANYUNGANG DIPU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a continuous ammoniation production process of 2,4-dinitroaniline to solve the technical problems of low intermittent production efficiency, heavy pollution and high cost

Method used

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  • A kind of continuous ammoniation production process of 2,4-dinitroaniline
  • A kind of continuous ammoniation production process of 2,4-dinitroaniline
  • A kind of continuous ammoniation production process of 2,4-dinitroaniline

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The main reactor is stirred by a high-temperature, high-pressure self-priming turbine. The agitator is composed of a hollow shaft and a double-suction closed turbine stirring paddle. The upper and lower openings of the hollow shaft make the gas phase material above the reactor communicate with the stirring opening below. The structure of the double-suction closed turbine agitator is as follows: two ring-shaped cover plates are arranged on the upper and lower ends of the disc turbine agitator which is composed of 8 standard backward curved impellers and complies with HG / T3796.5-2005 , 10-20 round holes leading into the hollow shaft are opened on the shaft sleeve of the agitator, and a steady flow ring is installed at the lower end of the agitator, which is filled with the material first and then continues to produce after heating and increasing the pressure, saving the feeding time. The design of the main reactor is based on the characteristics of gas participating in the...

Embodiment 2

[0045] Use a hot water pump to add water to the coil in the main reactor, thereby cooling the main reactor, so that the temperature of the main reactor is controlled at 160°C to 170°C. The hot water comes out of the main reactor coil and becomes steam, and the steam is collected by the sub-cylinder for the evaporator in the evaporation and concentration section. The condensate after evaporation and condensation is collected and returned to the hot water pump to continue cooling the main reactor for use. The heat of ammoniation reaction of one kilogram of 2,4-dinitrochlorobenzene is 2685.6097KJ / Kg.

[0046] ⑴Required conditions

[0047] ①Reaction temperature 165℃

[0048] ②Pressure 10kg / cm3,

[0049] ⑵ Raw materials brought into heat

[0050] Table 1 Raw materials brought into heat

[0051]

[0052] ⑶ heat of reaction

[0053] Q=1145.75×2685.6097=3077037.31KJ / t

[0054] ⑷The heat taken away by the product

[0055] Table 2 The heat taken away by the product

[0056] ...

Embodiment 3

[0061] Dinitroaniline reacts with ammonia, the yield is 99%, and 1145.75kg of dinitrochlorobenzene is put into it. After the reaction, dinitroaniline is obtained: 105.48kg, and unreacted dinitrochlorobenzene is 5.73kg, which is produced by the reaction of the mature machine. 5.13kg of dinitroaniline, 5.13+1020.36=1025.49kg of dinitroaniline from the mature machine, 1025.48×0.985=1010.11kg of dinitroaniline after washing, 1010.11×0.99=1000.00kg of dinitroaniline after filtration. Put in ammonia water, the ammonia content is 17~18%, calculated according to 18%, the reaction input ammonia is 201.94kg, find the amount of ammonia water, 201.94÷0.18=1121.89kg / t, the specific gravity of ammonia water is 0.935, the volume is 1138.80kg / t, dinitro The ammonia used for aniline is 1145.75÷202.55×17=96.16kg / t, the HCl produced is 1145.75÷202.55×36.5=206.47kg / t, the ammonia reacted by HCl is 206.47÷36.5×17=96.16kg / t, and the remaining ammonia 201.94-96.16-96.16=9.62kg / t, the amount of ammon...

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Abstract

The invention relates to a 2,4-dinitraniline continuous ammonification production technology, which is characterized in that 2, ,4-dinitraniline and ammoniacal liquor are taken as raw materials, the raw materials are reacted at temperature of 160-170 DEG C and pressure of 0.5-1.0 MPa, and then continuously added in an ammonification reactor; when the raw materials exceeds a discharge hatch, and are successively flowed to two auxiliary reactors, wherein the reaction temperature is controlled at 160-170 DEG C, and the reaction pressure is controlled at 0.5-1.0 MPa, reaction time of an ammonification reactor is 42 minutes, and reaction time of each auxiliary reactor is 15 minutes. The production technology has the advantages of high production efficiency, low energy consumption, environmental protection, economy, low labor intensity and safety, waste heat during an ammonification reaction process can be fully used, by-product ammonium chloride can be simultaneously recovered, no waste water is generated, and the production technology has the advantages of green production and good economic benefit.

Description

technical field [0001] The invention relates to a chemical technology, in particular to a continuous ammoniation production process of 2,4-dinitroaniline. Background technique [0002] 2.4-Dinitrochlorobenzene and ammonia water are used as raw materials to prepare 2,4-dinitroaniline. 2,4-Dinitroaniline is generated. This aminolysis reaction belongs to the bimolecular nucleophilic substitution reaction. First, the ammonia molecule with an unshared electron pair undergoes a nucleophilic attack on the carbon atom connected to the chlorine atom on the aromatic ring to obtain A polar intermediate adduct that is rapidly converted into the reaction product 2,4-dinitroaniline and the by-product ammonium chloride. [0003] At present, the existing and former production of 2,4-dinitroaniline is intermittent single-pot production, with low production efficiency, long reaction time and large production pollution. For the demand of ammoniation reaction, many excellent technical solutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C211/52C07C209/10
Inventor 段孝宁尹世英
Owner LIANYUNGANG DIPU CHEM
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