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Purification technology of phenylboronic acid

A phenylboronic acid and process technology, applied in the field of purification, can solve the problems of large consumption of raw materials, inconvenient use, waste of time and the like, and achieve the effects of simple operation, high efficiency and high purity

Inactive Publication Date: 2016-10-12
XUCHANG HAOFENG CHEM TECH
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  • Abstract
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Problems solved by technology

[0002] Purification refers to separating the impurities in the mixture to improve its purity; as an important chemical method, purification not only plays an important role in chemical research, but also plays a very important role in chemical production; many important Both chemical research and chemical production are mainly based on purification; the existing phenylboronic acid consumes a lot of raw materials when it is purified, and its purity is low, it is inconvenient to use and wastes time

Method used

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Embodiment Construction

[0010] This specific embodiment adopts following technical scheme: its purification process is:

[0011] Step 1. Washing impurities: Mix phenylboronic acid with impurities and butyllithium halogen extraction, and stir through a stirring device. After stirring, use dichloride or even petroleum ether to wash away the dehalogenated by-products;

[0012] Step 2, column chromatography separation: the solution in step 1 is subjected to column chromatography separation, and the solution that has not passed through the column is collected during separation;

[0013] Step 3, reflux: add dichloride dropwise to the solution in step 2, separate the impurities through the reflux device, and the rest is relatively pure phenylboronic acid;

[0014] Step 4, the solution collected in step 2 is boiled, washed and separated.

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Abstract

The invention discloses a purification technology of phenylboronic acid, and relates to the technical field of purification. The purification technology comprises the steps that 1, impurity washing is conducted, wherein phenylboronic acid with impurities is mixed with butyl lithium halogen, stirring is conducted through stirring equipment, and after stirring is finished, a dehalogenation by-product is washed by dichloro or petroleum ether; 2, column chromatography separation is conducted, wherein column chromatography separation is conducted on the solution obtained in the step 1, and the solution which is not subjected to column chromatography separation is collected during separation; 3, refluxing is conducted, wherein dichloro is dropwise added into the solution obtained in the step 2, the impurities are separated by a reflux device, and pure phenylboronic acid is retained; 4, the solution collected in the step 2 is subjected to boiling and washing separation. According to the purification technology, raw materials and time can be saved, operation is easy and convenient, and the efficiency and the purity are high.

Description

technical field [0001] The invention relates to the technical field of purification, in particular to a purification process of phenylboronic acid. Background technique [0002] Purification refers to separating the impurities in the mixture to improve its purity; as an important chemical method, purification not only plays an important role in chemical research, but also plays a very important role in chemical production; many important Both chemical research and chemical production are mainly based on purification; when the existing phenylboronic acid is purified, its raw material consumption is large, and its purity is low, which is inconvenient to use and wastes time. Contents of the invention [0003] The object of the present invention is to provide a kind of purification process of phenylboronic acid for the defect and deficiency of prior art. [0004] In order to solve the existing problems of the background technology, a kind of purification process of phenylboro...

Claims

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Application Information

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IPC IPC(8): C07F5/02
CPCC07F5/025
Inventor 骆俊
Owner XUCHANG HAOFENG CHEM TECH
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