Purification method of high-purity organic solvent 4-methyl-2-pentanone

A technology of organic solvent and purification method, which is applied in the field of purification of high-purity organic solvent 4-methyl-2-pentanone, and can solve problems such as not reaching the high-purity organic solvent 4-methyl-2-pentanone index , to achieve the effect of saving manpower, reducing energy consumption and significant economic benefits

Inactive Publication Date: 2011-05-04
天津市康科德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of 4-methyl-2-pentanone cannot meet the needs of relevant scientific research experiments, so this kind of 4-methyl-2-pentanone must be further purified to make its technical indicators reach the high-purity organic solvent 4 -Methyl-2-pentanone standard can be used
[0003] At present, there are few related elaborations on the further purification method of high-purity 4-methyl-2-pentanone reagent in China, and the high-purity organic solvent 4-methyl-2-pentanone (content 99.5%) cannot be achieved by general methods. index

Method used

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  • Purification method of high-purity organic solvent 4-methyl-2-pentanone

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Embodiment 1

[0017] A kind of purification method of high-purity organic solvent 4-methyl-2-pentanone, the steps are as follows:

[0018] (1) Lift the raw material 4-methyl-2-pentanone (content is about 99%) to the top of the adsorption column, wherein the adsorption column is 1.2M high and 3.0cm in diameter, and the amount of acidic alumina adsorbent in it is 1 / 2 of the column height 4 / 5, the raw material is adsorbed at a rate of 30mL / min; in the column, 4-methyl-2-pentanone is in full contact with the adsorbent acidic alumina, so that a small amount of alcohol and acidic impurities are adsorbed, and the adsorption liquid is detected Quality, after the adsorption effluent is qualified, that is, the indicators of the effluent are close to the technical index requirements of the chromatographic level (see Table 1 for specific technical index requirements), enter the next step, and remove the pre-adsorption fraction with high impurities.

[0019] (2) Put the 4-methyl-2-pentanone flowing out ...

Embodiment 2

[0022] A kind of purification method of high-purity organic solvent 4-methyl-2-pentanone, the steps are as follows:

[0023] (1) Lift the raw material 4-methyl-2-pentanone (content is about 99%) above the adsorption column, the adsorption column is 1.2M high, 3.0cm in diameter, and the amount of acidic alumina inside is 4 / 5 of the column height , the 4-methyl-2-pentanone raw material is adsorbed at a speed of 80mL / min, and the next step is performed after the adsorption liquid is qualified; and the fraction with high impurities before adsorption is removed;

[0024] (2) Put the effluent from the above-mentioned adsorption column into a drying column with a column height of 1.2M and a diameter of 3.0cm, and fill it with baked and dried anhydrous calcium sulfate, and measure the water content of 4-methyl-2-pentanone after drying , the water content is controlled at ≤0.05%, and the next step is to proceed after the water content is qualified; when the water content is greater tha...

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Abstract

The invention relates to a purification method of a high-purity organic solvent 4-methyl-2-pentanone, which comprises the following steps: carrying out adsorption and impurity removal on a raw material 4-methyl-2-pentanone by an acidic alumina adsorption column, drying and dewatering with anhydrous calcium sulphate, rectifying, filtering, and encapsulating to obtain the high-purity organic solvent 4-methyl-2-pentanone product. The obtained chromatographic 4-methyl-2-pentanone product has purity greater than 99.5%, a yield greater than 95% and a qualification rate greater than 95%, thereby meeting the application requirements of high-purity organic solvent users in scientific research and experiment. Simultaneously, compared with the conventional purification method, the invention has the advantages of simple and convenient operation process, stable running and high product purity, thereby being applicable to large-scale production.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a method for purifying an organic solvent, in particular to a method for purifying a high-purity organic solvent 4-methyl-2-pentanone. Background technique [0002] 4-methyl-2-pentanone (methyl isobutyl ketone) reagent is widely used in chemical and pharmaceutical solvents, separation and recovery of nuclear fission products and scientific research experiments. The content of 4-methyl-2-pentanone sold in the market is ≤99%, which contains a small amount of impurities such as alcohol, acidic substances and water. This kind of 4-methyl-2-pentanone cannot meet the needs of relevant scientific research experiments, so this kind of 4-methyl-2-pentanone must be further purified to make its technical indicators reach the high-purity organic solvent 4 - A standard of methyl-2-pentanone can be used. [0003] At present, there are few related elaborations on the further purificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/04C07C45/79C07C45/82
Inventor 宋金链张玉芝
Owner 天津市康科德科技有限公司
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