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
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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 impo

Method used

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Examples

Experimental program
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Example Embodiment

[0014] In order to better understand the present invention, the following examples further illustrate the present invention:

[0015] A 2,3-lutidine separation and purification method, including the following steps:

[0016] 1) Pretreatment:

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

[0018] Take 3000ml of crude product containing 55% 2,3-lutidine and load the sample, adjust the speed of the self-priming pump to 5r / s for adsorption treatment and observe its water output. After the adsorption is completed, add 2000ml of benzene for elution and detect it. The content of 2,3-lutidine was 17.1%. The collected eluate was free of benzene, and then rectified to obtain 491.3g of 2,3-lutid...

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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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