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Method for preparing o-nitroanisole

A technology of o-nitroanisole and o-nitrochlorobenzene, which is applied in the field of preparation of o-nitroanisole, can solve the problems of high cost, unreasonable process steps, and insufficient utilization of raw materials, etc.

Inactive Publication Date: 2010-02-10
夏恩将
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sometimes there are problems of unreasonable process steps and inaccurate process parameters, resulting in low yield of finished products, high cost, and raw materials cannot be fully utilized

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0007] Below in conjunction with embodiment the present invention is described in detail:

[0008] Add 100g of o-nitrochlorobenzene, 250ml of methanol, and 32g of sodium hydroxide into a stainless steel autoclave, seal it well, control the pressure at 0.1-1Mpa, and control the temperature at 30-60°C, react for 3-5 hours, and then ℃ for 10 hours to generate o-nitroanisole, the filtrate was separated, washed with 100ml of methanol, and o-nitroanisole was obtained after distillation, and all solvents used were recovered and used mechanically. The o-nitroanisole molar rate calculated according to the liquid chromatography analysis is 95%.

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Abstract

The invention discloses a method for preparing o-nitroanisole. The method comprises the following steps: performing a methoxylation reaction in organic solvent and basic state; and collecting the o-nitroanisole from a reactant by adopting a conventional method, wherein the molar yield of the finished product reaches over 90 percent. The method has reasonable process route; and the finished productprepared by adopting the method has higher yield and purity, thus has larger industrial prospect.

Description

technical field [0001] The invention relates to a preparation method of o-nitroanisole. Background technique [0002] O-nitroanisole is an important dye and pharmaceutical intermediate, mainly used in the production of anthranil, dianisidine, scarlet base B, etc. Currently, the preparation of o-nitroanisole is usually made by methoxylation. However, sometimes there are problems of unreasonable process steps and inaccurate process parameters, resulting in low yield of finished products, high cost, and insufficient utilization of raw materials. Contents of the invention [0003] For solving the above existing problems, the invention provides a kind of preparation method of o-nitroanisole, and the technical scheme that it takes is: [0004] O-nitroanisole is prepared by the following steps: [0005] 1) Add o-nitrochlorobenzene, organic solvent, and 30% sodium hydroxide solution into a stainless steel autoclave, and after sealing, control the pressure at 0.1-1Mpa, control t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C205/35C07C201/14
Inventor 夏恩将夏恩胜岳岩夏念丰
Owner 夏恩将
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