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Purification method for high-purity organic solvent normal propyl alcohol

A technology of organic solvent and purification method, applied in the field of purification of high-purity organic solvent n-propanol, can solve the problems of difficult removal, no published patent documents, low amount of impurities, etc., to reduce energy consumption, save manpower, and operate stably Effect

Inactive Publication Date: 2012-10-24
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 for high-purity organic solvent normal propyl alcohol

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Experimental program
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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 for high-purity organic solvent normal propyl alcohol. The method includes steps: subjecting raw normal propyl alcohol to removal of high ultraviolet absorption impurities by the aid of activated carbon, utilizing desiccants such as anhydrous calcium sulfate or calcium hydride for drying and dehydration, rectifying, filtering and packaging to obtain the high-purity organic solvent normal propyl alcohol. By the purification method for the high-purity organic solvent normal propyl alcohol, chromatographic-grade normal propyl alcohol products with the purity higher than 99.8% can be obtained, the yield is higher than 95%, the acceptance rate is higher than 93%, and application requirements of users in aspects of scientific researches, subject studies and the like of the high-purity organic solvent (HPLC) normal propyl alcohol can be met. In addition, compared with conventional methods, the purification method for the high-purity organic solvent normal propyl alcohol is high in product purity, simple and convenient to operate and stable in product quality and can be used for 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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