Apparatus and method for preparing nitrobenzene by nitration of tubular benzene

A production device and technology for nitrobenzene, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of overheating, uneven mixing of materials, uneven residence time of materials, etc., and reduce environmental pollution and equipment. The effect of low investment and easy operation

Inactive Publication Date: 2006-06-21
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phenomenon of uneven mixing of materials in the kettle, local overheatin

Method used

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  • Apparatus and method for preparing nitrobenzene by nitration of tubular benzene
  • Apparatus and method for preparing nitrobenzene by nitration of tubular benzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The tubular benzene nitration production device for producing nitrobenzene includes a mixed acid and benzene inlet pipe 1, a 14-stage nitration reaction pipe 2, a 13-stage connecting pipe 3, a nitration mixture outlet pipe 4, and a nitration mixture separator 5. The above-mentioned nitrification reaction tube 2 is provided with chemical fillers or mixing elements. The diameter of each nitrification mixing tube is 150mm and the length is 6000mm.

[0031] The specific installation method: the mixed acid and benzene inlet pipe 1 is connected with the inlet of the nitrification reaction pipe 2, the nitrification reaction pipe 2 is connected by the connecting pipe 3, the outlet of the nitrification reaction pipe 2 is connected with the nitrification mixture outlet pipe 4, and the nitrification mixture outlet pipe 2 is connected. The other end links with the nitration mixture separator 5. The nitrification reaction tube 2 is arranged vertically.

Embodiment 2

[0033] The tubular benzene nitration production device for producing nitrobenzene includes a mixed acid and benzene inlet pipe 1, a 24-stage nitration reaction pipe 2, a 23-stage connecting pipe 3, a nitration mixture outlet pipeline 4, and a nitration mixture separator 5. The diameter of each nitrification reaction tube is 300mm, and the length is 4000mm.

[0034] Specific installation method:

[0035] The specific installation method is the same as that of the first embodiment.

Embodiment 3

[0037] Embodiment 3 is basically the same as Embodiment 1, except that the nitrification reaction tube is arranged horizontally.

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Abstract

A tubing device for preparing nitrobenzene, comprising mixed acid and benzene inlet pipe, nitration pipe, nitration mixture outlet pipe and nitration mixture separator; with the characteristics being that: a nitration pipe equipped with chemical industry filler or mixing element inside which plaus stirring action for the material flowing in the pipe is equipped between the mixed acid and benzene inlet pipe and nitration reacting pipe, the mixed acid and benzene inlet pipe is connected with the inlet end of the nitration pipe, the outlet end of the nitration pipe is connected with nitration mixture outlet pipe, the nitration mixture outlet pipe is connected with nitration mixture separator; the nitration pipes are connected with each other through end-to-end joint or by connecting pipe when multistage nitration pipe is equipped. The invention is characterized in that: making the nitrobenzene production realize canalization production, the accommodation area of device is small and the device is easy to be arranged, the investment for device is small; there is no moving component in the bitration pipe which is not easy for out-of-order and increase producing effective time; the device is totally-enclosed, no leakage, being able to reduce environmental pollution; the elasticity of device operation is large; the device structure is simple and easy to operate.

Description

(1) Technical field [0001] The invention relates to a chemical product production device and a production method, in particular to a production device and a production method for preparing nitrobenzene by nitration of benzene. (2) Background technology [0002] At present, there are two production methods of nitrobenzene: the traditional constant temperature tank nitration method and the adiabatic tank type nitration method. [0003] The traditional constant temperature tank nitration method is to take out the heat of reaction under cooling conditions and complete the nitration reaction at a temperature of 60-70°C. The nitration reaction device used for constant temperature nitration is 3 to 4 stirring mixing nitration kettles used in series. Benzene nitration is a strongly exothermic reaction. The mixing method of the nitration kettle is mechanical stirring and mixing, the mixing effect is not good, and the phenomenon of local overheating of the materials in the kettle is...

Claims

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Application Information

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IPC IPC(8): C07C205/06C07C201/10
Inventor 吴剑华郭瓦力王文江龚斌
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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