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Method for producing o-nitro-p-chloroaniline by using chloridized aromatic hydrocarbon waste as raw material

A technology for chlorinating aromatic hydrocarbons and p-chloroaniline, which is applied in the field of producing o-nitro-p-chloroaniline by using chlorinated aromatic hydrocarbon wastes as raw materials, can solve problems such as difficult extraction, immature technology, and environmental pollution, and achieve reduction of environmental pollution, Easy to control and large-scale production, the effect of simple process

Inactive Publication Date: 2012-02-22
JIANGSU LONGCHANG CHEM
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Problems solved by technology

Due to its relatively complex composition and difficulty in extraction, it is generally not used
However, in its waste, it contains a large amount of chlorinated benzene, p-dichlorobenzene, m-dichlorobenzene, ortho-dichlorobenzene mixture, and a large amount of inorganic salt and high-boiler residue, which are all unacceptable in the industry. Indispensable raw materials, discarded, not only cannot be effectively utilized, but also cause great pollution to the environment; extraction, currently there is no relevant mature technology, and there are no literature reports at home and abroad

Method used

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Embodiment Construction

[0010] The production technology route of the project's product o-nitro-p-chloroaniline contains three parts, using physical integration technology to treat chlorinated aromatic wastes, using separation and integration technology to separate high-content p-dichlorobenzene from chlorinated aromatic wastes, Then, the target product o-nitro-p-chloroaniline is obtained through nitration and ammonification techniques.

[0011] The three major steps are as follows:

[0012] 1. Extract high-purity p-dichlorobenzene from chlorinated aromatic wastes through separation technology;

[0013] 2. Using p-dichlorobenzene as raw material to produce high-purity 2,5-dichloronitrobenzene through nitration technology;

[0014] 3. Use high-purity 2,5-dichloronitrobenzene as raw material to produce high-purity o-nitro-p-chloroaniline amine through ammoniation technology.

[0015] The specific process flow is given in the above three major steps as follows:

[0016] 1. Pretreatment of chlorinated...

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Abstract

The invention relates to a method for producing o-nitro-p-chloroaniline by using chloridized aromatic hydrocarbon waste as a raw material. The method comprises the following three parts of: processing the chloridized aromatic hydrocarbon waste by utilizing a physical synthesis technology; separating high-content p-dichlorobenzene from the chloridized aromatic hydrocarbon waste by using a separated integration technology; and obtaining the o-nitro-p-chloroaniline as a target product by utilizing nitrification and ammonification technologies. The method provided by the invention has the advantages of effectively utilizing the waste and reducing the environmental pollution. In addition, by adopting the process provided by the invention, the problems described in the specification are effectively solved, and the process is simple and convenient for control and large-scale production.

Description

technical field [0001] The invention relates to a production method of o-nitro-p-chloroaniline, in particular to a method for producing o-nitro-p-chloroaniline by using chlorinated aromatic hydrocarbon waste as a raw material. Background technique [0002] There are some coke, solid impurities, trace water and acidic substances in chlorinated aromatic waste. Due to its relatively complex composition and difficulty in extraction, it is generally not used. However, in its waste, it contains a large amount of chlorinated benzene, p-dichlorobenzene, m-dichlorobenzene, ortho-dichlorobenzene mixture, and a large amount of inorganic salt and high-boiler residue, which are all unacceptable in the industry. The indispensable raw materials are discarded, not only cannot be effectively utilized, but also cause great pollution to the environment; there is currently no relevant mature technology for extraction, and there are no literature reports at home and abroad. Contents of the in...

Claims

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Application Information

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IPC IPC(8): C07C211/52C07C209/10C07C25/08C07C17/383C07C17/392
Inventor 佘道才王兆昌许小亮吴春江冒宏驹
Owner JIANGSU LONGCHANG CHEM
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