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Separation and purification method of 2,3-dimethylpyridine

A lutidine and large pore technology, applied in organic chemistry and other fields, can solve the problems of complex separation technology and restricted development, and achieve the effects of short process flow, resource saving and low energy consumption

Inactive Publication Date: 2015-09-09
ANHUI COSTAR BIOCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complicated separation technology of 2,3-lutidine, the domestic demand for raw materials mainly depends on imports, which seriously restricts the development of these biomedical intermediates with pyridine homologues as raw materials

Method used

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Examples

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Embodiment Construction

[0014] In order to understand the present invention better, further illustrate the present invention below in conjunction with embodiment:

[0015] A method for separating and purifying 2,3-lutidine, comprising the following steps:

[0016] 1) Preprocessing:

[0017] Soak 1000ml LX-38 type resin with 1000ml ethanol for 24hrs, then wash with water until it is odorless, soak it through the resin column with 5% HCl for 4hrs, wash it with water until it is neutral, soak it with 5% NaOH for 4hrs through the resin column, wash it with water until it is neutral, and use The self-priming pump fully absorbs the moisture in the resin and sets it aside;

[0018] Take 3000ml of crude product containing 55% 2,3-lutidine to load the sample, adjust the speed of the self-priming pump to 5r / s for adsorption treatment and observe its effluent condition, add 2000ml of benzene for elution after the adsorption is completed, and detect its The content of 2,3-lutidine was 17.1%. The collected elue...

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PUM

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Abstract

The invention discloses a separation and purification method of 2,3-dimethylpyridine. According to the separation and purification method, BS-80-5 macroporous resin is adopted for separation and purification of 2,3-dimethylpyridine crude products; the BS-80-5 macroporous resin is taken as an adsorbent, selective adsorption performance and screening effect of the BS-80-5 macroporous resin on different ingredients are used, and appropriate adsorption and desorption conditions are selected, so that separation and purification of one or a certain kind of organic compounds are realized.

Description

technical field [0001] The invention relates to a new process for separating and purifying crude 2,3-lutidine by using a large-pore-diameter adsorption resin as an adsorbent and utilizing its selective adsorption and screening effects on different components. Background technique [0002] Pyridine base is a nitrogen-containing heterocyclic core common compound that replaces imported, highly toxic, heterocyclic pesticides, medicines, veterinary drugs and other three-drug intermediates that are strongly encouraged by the state, commonly known as heterocyclic three-drugs and three-drugs The "chip" of intermediates is also an important raw material for daily chemicals, food flavors, feed additives, and radial tires. The successful development and application of pyridine base will promote the upgrading of domestic three-drug and three-drug intermediate industries, independent innovation, energy conservation and emission reduction , Circular economy has a huge role in promoting an...

Claims

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Application Information

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IPC IPC(8): C07D213/16
CPCC07D213/16
Inventor 周爱民王长才李习红葛德强
Owner ANHUI COSTAR BIOCHEM CO LTD
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