Purification method of highly pure organic solvent n-propanol

An organic solvent and purification method technology, which is applied in the field of purification of high-purity organic solvent n-propanol, can solve problems such as difficult to remove, low amount of impurities, and no published patent documents, so as to reduce energy consumption, operate stably, and save manpower Effect

Inactive Publication Date: 2012-10-17
天津康科德医药化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of n-propanol cannot meet the needs of users of high-purity organic solvent n-propanol, and must be further purified to make its technical indicators reach the standards of chromatographic grade before it can be used.
[0003] At present, there are few domestic reports on the purification methods of chromatographic n-propanol, mainly due to the small amount of impurities in commercially available n-propanol reagents, which are difficult to remove by general methods
[0004] Through the search, no published patent documents related to the application of the present invention were found

Method used

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  • Purification method of highly pure organic solvent n-propanol

Examples

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Effect test

Embodiment 1

[0020] A kind of purification method of high-purity organic solvent n-propanol, the steps are as follows:

[0021] ⑴ Raise the raw material n-propanol (content is about 99.1%) above the adsorption column, and the n-propanol raw material flows through the adsorption column at a speed of 40mL / min. The adsorption column is 1.6M high and 4.2cm in diameter. The amount of activated carbon adsorbent inside is 4 / 5 of the column height, and the particle size of activated carbon is 0.4mm~0.8mm. In the adsorption column, n-propanol is in full contact with the activated carbon adsorbent to absorb organic impurities with high ultraviolet rays. After the adsorption effluent test is nearly qualified (see Table 1 for specific technical index requirements), enter the next step to further purify and remove the fraction before adsorption.

[0022] (2) Put the n-propanol flowing out of the above-mentioned adsorption column into the drying column, the column height is 1.6M, and the diameter is 4....

Embodiment 2

[0026] A kind of purification method of high-purity organic solvent n-propanol, the steps are as follows:

[0027] ⑴ Raise the raw material n-propanol (content is about 99.1%) to the top of the adsorption column, and the n-propanol raw material is adsorbed at a speed of 100mL / min. The adsorption column is 1.6M high and 4.2cm in diameter. The amount of activated carbon adsorbent inside is 4 / 5 of the column height, and the particle size of activated carbon is 0.4mm~0.8mm. After the adsorption liquid is nearly qualified, enter the next step to further purify and remove the pre-adsorption fraction with high impurities;

[0028] (2) Put the effluent from the above-mentioned adsorption column into the drying column, the tower height is 1.6M, and the diameter is 4.2cm. Fill it with calcium hydride, and measure the water content of n-propanol after drying. The water content is controlled at ≤0.05%. After the water content is qualified, enter the next step Operation; when the moisture...

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Abstract

The invention relates to a purification method of highly pure organic solvent n-propanol. The method comprises the following steps of: removing the impurities with high ultraviolet absorption in the raw material n-propanol by active carbon; drying and dewatering the treated n-propanol by a drying agent of anhydrous calcium sulphate or calcium hydride; rectifying; filtering; and packing to obtain the highly pure organic solvent n-propanol. The purification method provided by the invention can obtain the chromatographic-grade n-propanol product with the purity more than 99.8%; the yield of the n-propanol is more than 93%; the qualified rate of the n-propanol is more than 93%; the application need of users of highly pure organic solvent n-proanol (HPLC) (high performance liquid chromatography) in the scientific research and the subject research can be satisfied; compared with the traditional methods, the n-propanol obtained by the method provided by the invention is high in the purity; the operation is simple; the quality of the product is stable, and thus the method can be applied to the 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 n-propanol. Background technique [0002] N-propanol is mainly used as a solvent and cleaning agent for vegetable oils, natural rubber, resins and cellulose, as a raw material in organic synthesis, as a standard in chromatographic analysis and as a high-purity reagent in scientific research experiments. The conventional n-propanol reagent has a n-propanol content of about 99.1%, and the main impurities are water and allyl alcohol. This kind of n-propanol cannot meet the needs of users of high-purity organic solvent n-propanol, and must be further purified so that its various technical indicators reach the standards of chromatographic grade before it can be used. [0003] At present, there are few domestic reports on the purification methods of chromatographic n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/10C07C29/76
Inventor 宋金链张玉芝
Owner 天津康科德医药化工有限公司
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