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Synthetic method of p-bromophenol

A synthesis method and a technology for p-bromophenol are applied in the synthesis field of p-bromophenol, can solve problems such as difficult industrialization, complicated process, etc., and achieve the effects of easy industrialization, simple process and high yield

Inactive Publication Date: 2013-01-09
俞龙飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these two methods involve the preparation of brominating agents and catalysts, the process is more complicated and the industrialization is more difficult

Method used

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Embodiment Construction

[0012] The present invention comprises the steps:

[0013] (1) A certain amount of phenol is weighed, dissolved in a quantitative solvent, then added to the four-necked flask, and then the four-necked flask is put into the reaction tank;

[0014] (2) Magnet is added in the four-necked flask, the electromagnetic heating stirrer is turned on and started to stir, and the thermometer and the dropping funnel are inserted into the four-necked flask;

[0015] (3) Weigh a certain amount of bromine and quantitative solvent and pour it into the dropping funnel, add ice or frozen brine to the reaction tank, control the temperature, and when the temperature is constant to the predetermined temperature of the experiment, open the dropping funnel and start dropping Bromine solution, start timing at this time;

[0016] (4) After the reaction, add saturated sodium bisulfite for neutralization treatment, then wash the reaction solution with distilled water, and finally separate the reaction s...

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Abstract

The invention relates to a synthetic method of p-bromophenol, which belongs to the technical field of a chemical reagent synthetic method, and especially relates to the synthetic method of p-bromophenol. The invention provides the synthetic method of p-bromophenol with high yield of p-bromophenol, simple technology and easy industrialization. The method comprises the following steps: 1) weighting a certain amount of phenol, dissolving in a quantitative solvent, adding in a 4-mouth flask, then putting the 4-mouth flask in a reaction tank; 2) adding a magnetite in the 4-mouth flask, turning on an electromagnetic heating stirrer for stirring, inserting a thermometer and a liquid dropping tunnel in the 4-mouth flask; 3) weighting the certain amount of bromine and the quantitative solvent and dumping into the liquid dropping tunnel, adding ice cubes or iced brine in the reaction tank, controlling the temperature, when the temperature constantly reaches the predetermined temperature of an experiment, opening the liquid dropping tunnel, adding the bromine solution drop by drop, and then timing right now.

Description

technical field [0001] The invention belongs to the technical field of chemical reagent synthesis methods, in particular to a synthesis method of p-bromophenol. Background technique [0002] The products of direct bromination of phenol and bromine include p-bromophenol, o-bromophenol and 2,4-dibromophenol, among which p-bromophenol is the main product. Compared with o-bromophenol and 2,4-dibromophenol, p-bromophenol has greater value and market prospects. Moreover, the percentage of p-bromophenol in brominated products is also the largest, and in order to better realize the separation of brominated products and reduce production costs, this project mainly studies the para-positioning effect of phenol monobasic bromination, that is, bromine p-phenol Selective para-positioning generates p-bromophenol. P-bromophenol is an important organic intermediate, which can be used not only as a pharmaceutical intermediate, but also as a pesticide intermediate, and as a dye intermediate...

Claims

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Application Information

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IPC IPC(8): C07C39/27C07C37/62
Inventor 俞龙飞
Owner 俞龙飞
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