Production preparation process of m-phenylenediamine

A technology for the preparation of m-phenylenediamine, which is applied in the field of m-phenylenediamine preparation, can solve the problems of single process and low production efficiency, and achieve the effects of high reaction efficiency and safe use

Inactive Publication Date: 2019-11-12
上海鸿源鑫创材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a production and preparation process of m-phenylenediamine, aiming to solve the problem of single process and low production efficiency

Method used

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  • Production preparation process of m-phenylenediamine

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] see figure 1 , the present invention provides a technical solution: a production and preparation process of m-phenylenediamine, which adopts a m-phenylenediamine preparation device to realize the preparation of m-phenylenediamine, and the m-phenylenediamine preparation device includes a gas supply component 1. Reaction component 2 and purification component 3.

[0023] The gas supply assembly 1 includes: a gas storage tank 11, a first gas valve 12, a branch pipe 13, a main pipe 14, a second gas valve 15 and a controller 16. There are three gas storage tanks 11 and are used to provide hydrog...

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Abstract

The invention is applicable to the technical field of preparation of m-phenylenediamine, and provides a production preparation process of m-phenylenediamine. According to the process, a m-phenylenediamine preparation device is utilized to realize preparation of m-phenylenediamine, and the m-phenylenediamine preparation device comprises a gas supply assembly, a reaction assembly and a purificationassembly, wherein the gas supply assembly comprises a gas storage tank, a first gas valve, a branch pipe, a main pipe, a second gas valve and a controller, the reaction assembly comprises a reaction kettle and a material discharge pipe, and the reaction kettle communicates with the main pipe; one end of the material discharge pipe communicates with the reaction kettle, the purification assembly includes a rectification tower, a transfer pump, a crystallizer and a communication pipe, and the production preparation process includes the steps: adopting ethanol as a solvent in the reaction kettle,and performing a continuous catalytic hydrogenation reaction through a catalyst and hydrogen so as to reduce m-dinitrobenzene, wherein the catalyst is quaternary raney nickel; and performing rectification through the rectification tower after the reaction, and performing crystallization through the crystallizer. The process has the characteristics of continuous supply of hydrogen gas and high reaction efficiency.

Description

technical field [0001] The invention belongs to the field of m-phenylenediamine preparation, in particular to a production and preparation process of m-phenylenediamine. Background technique [0002] m-Phenylenediamine is white needle crystal at room temperature, soluble in ethanol, water, chloroform, acetone, dimethylamide, slightly soluble in ether, carbon tetrachloride, hardly soluble in benzene, toluene, butanol. Unstable in the air, easy to turn into light red. This product is combustible, and the combustion decomposition products are carbon monoxide, carbon dioxide and nitrogen oxides. M-Phenylenediamine is a toxic chemical that is irritating to the eyes and skin. The substance can be absorbed into the body through inhalation of its vapor, through the skin and ingestion. Repeated or long-term exposure may cause skin allergies, may have effects on the kidneys and blood, leading to renal failure and the formation of methaemoglobin. Effects may be delayed and medical o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/36C07C209/86C07C211/51
CPCC07C209/36C07C209/86C07C211/51
Inventor 苏建军倪晓峰张玉宝
Owner 上海鸿源鑫创材料科技有限公司
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