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Purification method of high-purity organic solvent n-heptane

An organic solvent and purification method technology, applied in the field of purification of high-purity organic solvent n-heptane, can solve the problems such as the rapid development of science and technology, unstable quality, etc., and achieve improved purity and stability, expanded application scope, and stable operation. Effect

Active Publication Date: 2015-11-25
上海星可高纯溶剂有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In recent years, due to the development of science and technology, the number of experimental research subjects has increased continuously, and the demand and purity requirements for n-heptane have continued to increase. However, the existing high-purity n-heptane is mainly imported. Although domestic high-purity reagents are produced, there is The quality is unstable and cannot meet the needs of rapid technological development

Method used

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  • Purification method of high-purity organic solvent n-heptane

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Effect test

Embodiment 1

[0021] The purification method of high-purity organic solvent n-heptane comprises the steps:

[0022] a. Take the raw material n-heptane, add sulfuric acid solution with a volume concentration of 10% and a nitric acid solution with a volume concentration of 40% to it successively, the volume ratio of sulfuric acid and nitric acid is 1:3, shake, stand for stratification, discard Remove the acid layer and keep the organic layer; add activated carbon to the above organic layer, stir for 1 hour, add potassium permanganate for oxidation, and reflux for 1 hour, quickly distill out n-heptane. This step is used to remove unsaturated hydrocarbons in the raw material n-heptane.

[0023] b. the n-heptane obtained in step a is passed through the adsorbent column equipped with modified activated carbon at a speed of 0.5 column volume / hour, to further remove highly polarized substances and substances containing benzene rings formed in the oxidation process. Wherein the activated carbon is ...

Embodiment 2

[0029] The purification method of high-purity organic solvent n-heptane comprises the steps:

[0030] a. Take the raw material n-heptane, add a sulfuric acid solution with a volume concentration of 30% and a nitric acid solution with a volume concentration of 65% to it in turn, the volume ratio of sulfuric acid and nitric acid is 1:1, after shaking and standing for stratification, Discard the acid layer and keep the organic layer; add zeolite to the above organic layer, stir for 2 hours, add sodium persulfate for oxidation, and reflux for 3 hours, then quickly distill off n-heptane. This step is used to remove unsaturated hydrocarbons in the raw material n-heptane.

[0031] b. The n-heptane obtained in step a is passed through the adsorbent column equipped with modified activated carbon at a speed of 10 column volumes / hour, to further remove highly polarized substances and substances containing benzene rings formed in the oxidation process. Wherein the active carbon is sequen...

Embodiment 3

[0037] The purification method of high-purity organic solvent n-heptane comprises the steps:

[0038] a. Take the raw material n-heptane, add to it successively a sulfuric acid solution with a volume concentration of 20% and a nitric acid solution with a volume concentration of 45%, the volume ratio of sulfuric acid and nitric acid is 1:2, after shaking and standing for stratification, Discard the acid layer and keep the organic layer; add molecular sieves to the above organic layer, stir for 1.5 hours, add potassium persulfate for oxidation, and reflux for 0.5 hours, quickly distill off n-heptane. This step is used to remove unsaturated hydrocarbons in the raw material n-heptane.

[0039] b. The n-heptane obtained in step a is passed through the adsorbent column equipped with modified activated carbon at a speed of 30 column volumes / hour, to further remove highly polarized substances and substances containing benzene rings formed in the oxidation process. Wherein the active ...

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Abstract

The invention discloses a purification method of a high-purity organic solvent n-heptane. The method is characterized by comprising the following steps: taking a raw material n-heptane, adding an oxidizing agent into the raw material and stirring, and heating to distill off n-heptane; and carrying out adsorption treatment by blowing n-heptane which has been distilled off into a column of an adsorbent filled with modified active carbon so as to obtain a high-purity organic solvent n-heptane with the purity being greater than or equal to 99 wt%. By the purification method of the high-purity organic solvent n-heptane, the high-purity solvent n-heptane with the purity being greater than or equal to 99 wt% is obtained through the process of modified active carbon adsorption. In comparison with home-produced n-heptane, purity and stability of n-heptane produced by the method of the invention are further enhanced. The n-heptane obtained by purification can be applied in fields of chromatographic analysis, chromatographic separation, chromatographic preparation and the like, and the application range of n-heptane is broadened.

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-heptane. Background technique [0002] N-heptane is one of the most widely used hydrocarbon solvents in industry today. It is used as an extraction solvent for animal and vegetable oils, as well as for quick-drying rubber adhesives and rubber solvents. It is also used in the manufacture of cosmetics and as a solvent for cleaning coatings, paints, quick-drying inks and printing machine parts. Industrial-grade n-heptane is mostly obtained through separation of petroleum fractions, and its purity is relatively low. In recent years, due to the development of science and technology, the number of experimental research subjects has been increasing, and the demand and purity requirements for n-heptane have continued to increase. However, the existing high-purity n-heptane is mainly imported. Although domestic high-purity reagent...

Claims

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Application Information

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IPC IPC(8): C07C9/15C07C7/00C07C7/12
Inventor 范文林张群星张怡杨永年
Owner 上海星可高纯溶剂有限公司
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