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Purification method of organic solvent n-hexane

A technology of organic solvent and purification method, which is applied in the field of purification of high-purity organic solvent n-hexane, which can solve the problems of high-purity n-hexane dependence on imports, failure to meet high-purity requirements, complicated production process, etc., and achieve low production cost and stable operation , The effect of simple production process

Active Publication Date: 2017-11-10
上海星可高纯溶剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If precision distillation and special distillation process are adopted, there are disadvantages such as high energy consumption, high production cost, low yield and complicated production process, which also leads to my country's dependence on imports of high-purity n-hexane
At present, there are few domestic reports about obtaining high-purity n-hexane through adsorption and purification. The patent application number 200910068762.4 discloses a method for purifying n-hexane by zeolite adsorption. The purified n-hexane has a purity of ≥98% (wt), which is still not To meet the high purity requirements of industrial use, the purification method needs to be further improved

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  • Purification method of organic solvent n-hexane
  • Purification method of organic solvent n-hexane

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Experimental program
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Effect test

Embodiment 1

[0020] The purification method of organic solvent normal hexane, comprises the steps:

[0021] a. Take the raw material n-hexane, add sulfuric acid with a volume concentration of 10% therein, shake and stand for stratification, discard the acid layer and keep the organic layer; add activated carbon in the above organic layer, stir for 1 hour, Potassium permanganate was added for oxidation, and after refluxing for 1 hour, n-hexane was quickly distilled off.

[0022] b. Pass the normal hexane obtained in step a through the adsorbent column equipped with modified activated carbon at a high speed, and further remove unsaturated organic compounds containing carbon-carbon double bonds, such as aromatic hydrocarbons and olefins. The activated carbon is soaked in the nitric acid solution, and the surface of the activated carbon is attached to the nitric acid solution, thereby obtaining the modified activated carbon.

[0023] bˊ. Pass the n-hexane obtained in step b into an adsorbent ...

Embodiment 2

[0027] The purification method of organic solvent normal hexane, comprises the steps:

[0028] a. Get the raw material n-hexane, add sulfuric acid with a volume concentration of 10% therein, shake and stand for stratification, discard the acid layer and keep the organic layer; add activated carbon in the above organic layer, stir for 2 hours, Potassium permanganate was added for oxidation, and after refluxing for 3 hours, n-hexane was quickly distilled off.

[0029] b. Pass the normal hexane obtained in step a through the adsorbent column equipped with modified activated carbon at a high speed, and further remove unsaturated organic compounds containing carbon-carbon double bonds, such as aromatic hydrocarbons and olefins. The activated carbon is sequentially soaked in liquid ethylenediaminetetraacetic acid and triethanolamine, so that the activated carbon is attached to the ethylenediaminetetraacetic acid and triethanolamine, thereby obtaining the modified activated carbon. ...

Embodiment 3

[0034] The purification method of organic solvent normal hexane, comprises the steps:

[0035] a. Get the raw material n-hexane, add sulfuric acid with a volume concentration of 10% therein, shake and stand for stratification, discard the acid layer and keep the organic layer; add activated carbon in the above organic layer, stir for 1.5 hours, Potassium permanganate was added for oxidation, and after refluxing for 0.5 hour, n-hexane was quickly distilled off.

[0036] b. Pass the normal hexane obtained in step a through the adsorbent column equipped with modified activated carbon at a high speed, and further remove unsaturated organic compounds containing carbon-carbon double bonds, such as aromatic hydrocarbons and olefins. The activated carbon is sequentially soaked in the zinc hydroxide solution, so that the activated carbon is attached to the zinc hydroxide solution, thereby obtaining the modified activated carbon.

[0037] b'. Pass the n-hexane obtained in step b throug...

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Abstract

The invention discloses a method for purifying a high-purity organic solvent n-hexane, which is characterized in that impurities in the raw material n-hexane are removed through processes such as modified activated carbon adsorption to obtain the high-purity organic solvent n-hexane. The purification method of the high-purity organic solvent n-hexane provided by the present invention can obtain n-hexane with a purity ≥ 99% (wt), which meets the high purity requirements of chromatographic grade reagents, and enables the purified n-hexane to be applied to chromatographic analysis and chromatographic separation , chromatographic preparation and other fields, expanding the scope of application.

Description

technical field [0001] The invention relates to the field of solvent purification, in particular to a method for purifying a high-purity organic solvent n-hexane. Background technique [0002] n-Hexane is one of the most widely used hydrocarbon solvents in industry today, and it is also the most representative non-polar solvent. It can dissolve various hydrocarbons and halogenated hydrocarbons. Insecticides, rubber, cosmetics, spices, chemical polymerization, medicine, cleaning of electronic components and many other aspects have a wide range of uses. At present, industrial grade n-hexane products with a purity of 60-80% (wt) are obtained from natural gasoline, straight-run gasoline and light components by rectification, which contains impurities such as hydrocarbons with similar boiling points and water. Since the boiling point of impurities is close to that of n-hexane (eg, n-hexane has a boiling point of 69°C and methylcyclopentane is 71.8°C), it is difficult to remove t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C9/15C07C7/00C07C7/12
Inventor 范文林张群星王洪
Owner 上海星可高纯溶剂有限公司