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Method for purifying chromatographic grade organic solvent methyl tertiary butyl ether

A technology of methyl tert-butyl ether and organic solvent, which is applied in the field of purification of chromatographic-grade organic solvent methyl tert-butyl ether, to achieve the effects of saving manpower, significant economic benefits, and high product purity

Inactive Publication Date: 2012-04-18
天津市康科德科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of methyl tert-butyl ether cannot meet the needs of users of high-purity organic solvent methyl tert-butyl ether, so this kind of methyl tert-butyl ether must be further purified to make its various technical indicators reach the chromatographic level. standard to use
[0004] At present, there are few domestic reports on the purification methods of chromatographic grade methyl tert-butyl ether, which are in urgent need of development and research. The present invention proposes an effective solution to this technical problem

Method used

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  • Method for purifying chromatographic grade organic solvent methyl tertiary butyl ether

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Embodiment 1

[0024] A purification method of chromatographic grade organic solvent methyl tert-butyl ether, the steps are as follows:

[0025] (1) Adsorption: Lift the raw material methyl tert-butyl ether (99.0% to 99.4%) to the top of the adsorption column. The two adsorption columns are the same: 1.5M in height, 4.0cm in diameter, and equipped with 100-mesh Alumina and silica gel adsorbent, the column capacity is 4 / 5 of the column height, and the raw material of methyl tert-butyl ether flows through the two columns in turn at a speed of 30mL / min for adsorption;

[0026] In this step, the methyl tert-butyl ether in the adsorption column is in full contact with the alumina and silica gel adsorbent, and most of the organic impurities and some water are removed by adsorption. , enter the next step operation, and remove the fraction before adsorption;

[0027] (2) Drying: the effluent in step (1) is put into the drying column, the specifications of the drying column and the packing volume ar...

Embodiment 2

[0032] A purification method of chromatographic grade organic solvent methyl tert-butyl ether, the steps are as follows:

[0033] (1) Adsorption: Lift the raw material methyl tert-butyl ether (99.0% to 99.4%) to the top of the adsorption column. The two adsorption columns are the same: 1.5M in height, 4.0cm in diameter, and equipped with a particle size of about 200 Purpose Alumina and silica gel adsorbent, the column capacity is 4 / 5 of the column height, and the raw material of methyl tert-butyl ether is adsorbed at a speed of 80mL / min. After the adsorption liquid is nearly qualified, enter the next step; and remove impurities High pre-adsorption fraction;

[0034] (2) Drying: the effluent in step (1) is put into a drying column, the specifications of the drying column and the loading capacity are all the same as those of the adsorption column, and the oven-dried anhydrous calcium sulfate is loaded, and the flow rate is 100mL / min. Measure the water content of methyl tert-but...

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Abstract

The invention relates to a method for purifying a chromatographic grade organic solvent methyl tertiary butyl ether. The method comprises the following steps of: allowing a raw material, namely methyl tertiary butyl ether to pass through alumina and silica gel so as to remove peroxide impurities, partially dehydrating, further dewatering by using a drying agent, namely anhydrous calcium sulfate, rectifying, filtering, and packaging to obtain a high-purity organic solvent methyl tertiary butyl ether product. In the method, the methyl tertiary butyl ether with the content of between 99.0 and 99.4 percent is taken as the raw material and the alumina and the silica gel are taken as adsorbents for adsorption separation so as to remove organic impurities such as peroxide, partial water and the like from the raw material, anhydrous calcium sulfate is used for further dewatering, and a methyl tertiary butyl ether product with the purity of more than 99.8 percent is obtained by the steps of adsorption, drying, rectification and purification; and various other chromatographic indexes all meet the requirements. The recovery rate is over 93 percent; and the yield approximately reaches over 93 percent.

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 chromatographic-grade organic solvent methyl tert-butyl ether. Background technique: [0002] MTBE is mainly used as a solvent for paraffin, spices, alkaloids, resins, natural and synthetic rubber, and fatty substances. It is an additive of gasoline, which can replace alkane lead to eliminate environmental pollution; it is used as a standard in chromatographic analysis and a high-purity reagent in scientific research experiments. [0003] Conventional methyl tert-butyl ether reagent, its methyl tert-butyl ether content is about 99.2%, and the main impurities are alcohol, isobutylene, peroxide and water. This kind of methyl tert-butyl ether cannot meet the needs of users of high-purity organic solvent methyl tert-butyl ether, so this kind of methyl tert-butyl ether must be further purifie...

Claims

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Application Information

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IPC IPC(8): C07C43/04C07C41/34
Inventor 宋金链张玉芝
Owner 天津市康科德科技有限公司
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