Method and device for preparing 3,4-dichloroaniline without solvent

A dichloroaniline and solvent-free technology, which is applied in the field of solvent-free production of 3,4-dichloroaniline, can solve the problems of inaccurate color determination, affecting the reaction effect, affecting the increase of the load of a single kettle, and increasing the operational safety factor. The effect of low labor intensity of workers, low production cost and high level of self-control

CN102675127AInactive Publication Date: 2012-09-19山东沾化天九化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-09-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of chemical processing, and particularly discloses a method and a device for preparing 3,4-dichloroaniline without solvent. The method includes using 3,4-dichloronitrobenzene as a raw material, adding an assistant and a novel catalyst into the 3,4-dichloronitrobenzene, feeding hydrogen into a hydrogenation kettle to react continuously under certain pressure and at certain temperature, and collecting reacted hydrogenated liquid into a hydrogenated liquid tank via a filter; and blowing a filtered catalyst into the hydrogenation kettle to be reused via the filter. The method and the device have the advantages that a process is simple in operation, production cost is low, automatic control degree is high, yield of product is also high, quality is good, side reaction is little, reaction conditions are moderate, security is guaranteed, labor intensity of workers is low, and the method and the device are suitable for wide popularization and application.
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Description

(1) Technical field

[0001] The invention belongs to the field of chemical production, in particular to a method and device for producing 3,4-dichloroaniline without solvent. (2) Background technology

[0002] With the reform and opening up and the rapid development of the national economy, the fine chemical industries such as medicine, fuel, pesticide, and daily chemical industry have ranked among the world's major countries in terms of scale and quantity, but there is still a large gap between the technical level and the developed countries, and the product quality is not high. , high material consumption and energy consumption, especially the imperfect treatment of three wastes, seriously restricts the further development of fine chemicals. In recent years, my country's catalytic hydrogenation technology has made major breakthroughs in technology development and promotion. Catalytic hydrogenation technology has not only been widely used in petrochemicals and petroleum ...

Examples

Embodiment Construction

[0019] figure 1 It is a specific embodiment of the present invention. This embodiment comprises the magnetic hydrogenation kettle 1 that communicates with the hydrogen inlet pipe 5, and the hydrogenation kettle 1 and the hydrogen inlet pipe 5 are all communicated with the filter 2, and the filter 2 is communicated with the settling tank 3; the communication between the filter 2 and the settling tank 3 A pipeline sight glass 4 is installed on the pipeline; a sampling port 6 is installed at the bottom of the hydrogenation kettle 1 .

[0020] Before feeding, add anti-dechlorination inhibitor in hydrogenation kettle 1, put into hydrogenation kettle 1 then 3,4-dichloronitrobenzene, morpholine and the platinum carbon catalyst that parts by weight are 1%, at certain pressure Hydrogen gas is fed into the hydrogenation tank at a low temperature to react continuously in the hydrogenation tank. After the hydrogenation is qualified, the mixed liquid passes through the filter 2 to filter ...