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Method for purifying chromatographic grade organic solvent 1,2-dichloroethane

A dichloroethane and organic solvent technology, applied in the field of chromatographic grade organic solvents, can solve the problems of complicated processing and purification, difficult to remove impurities, etc., and achieve the effects of stable product quality, reduced energy consumption, and significant economic benefits.

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

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Problems solved by technology

[0004] At present, there are very few materials about the purification method of 1,2-dichloroethane in China, multi-step chemical treatment and purification are too complicated, and simple rectification is also difficult to remove impurities. Therefore, the present invention proposes an effective solution to this technical problem

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  • Method for purifying chromatographic grade organic solvent 1,2-dichloroethane

Examples

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Embodiment 1

[0023] A kind of purification method of chromatographic grade organic solvent 1,2-dichloroethane, the steps are as follows:

[0024] (1) Pour the raw material 1,2-dichloroethane into the top of the adsorption column, where the adsorption column is 1.8M high and 5.0cm in diameter, one of which is equipped with activated carbon with a particle size of about 100 mesh, and the other is equipped with About 100 mesh acidic alumina, the column volume is 4 / 5 of the column height, 1,2-dichloroethane flows through the two adsorption columns in sequence at a flow rate of 40mL / min, for adsorption and removal of impurities; detection of the quality of the adsorption liquid After the adsorption effluent has passed the test (that is, the indicators of the effluent are close to the technical index requirements of the chromatographic level, the specific technical index requirements are shown in Table 1.), enter the next step, and remove the fraction before adsorption.

[0025] In this step, th...

Embodiment 2

[0031] A kind of purification method of chromatographic grade organic solvent 1,2-dichloroethane for scientific research, the steps are as follows:

[0032] (1) Put the raw material 1,2-dichloroethane into the top of the adsorption column, wherein the adsorption column is 1.8M high and 5.0cm in diameter, one of which is equipped with activated carbon with a particle size of 200 mesh, and the other is equipped with a particle size of 200-mesh acidic alumina, the volume of the column is 4 / 5 of the column height, 1,2-dichloroethane flows through the two adsorption columns in sequence at a flow rate of 100mL / min, for adsorption and impurity removal; the quality of the adsorbed liquid is detected, and the After the adsorption effluent has passed the inspection (that is, the indicators of the effluent are close to the technical index requirements of the chromatographic grade, and the specific technical index requirements are shown in Table 1), enter the next step and remove the fract...

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Abstract

The invention relates to a method for purifying a chromatographic grade organic solvent 1,2-dichloroethane. The method comprises the following steps of: allowing a raw material, namely 1,2-dichloroethane to pass through an absorption column loaded with activated carbon and acidic alumina so as to remove chloride and some acid impurities, dehydrating by using a drying agent, rectifying, and filtering to obtain a high performance liquid chromatography grade 1,2-dichloroethane product. In the method, the 1,2-dichloroethane with the content of about 99.2 percent is taken as the raw material and the activated carbon and the acidic alumina are taken as adsorbents for adsorption separation so as to remove impurities from the raw material, anhydrous calcium chloride is used as the drying agent so as to remove the moisture from the raw material, and a 1,2-dichloroethane product with the purity of 99.9 percent is obtained by the steps of adsorption, drying, rectification and purification; the yield is improved to be more than 93 percent; and various other indexes can all meet chromatographic index requirements.

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 1,2-dichloroethane. Background technique: [0002] 1,2-Dichloroethane is used as a raw material for medicine, polyvinyl chloride, ethylenediamine, ethylene glycol, etc., and is also an excellent solvent for fat, wax, and glue. It is used as detergent, extraction agent and chemical reagent in chemical industry. [0003] The commercially available 1,2-dichloroethane reagent is of low grade and poor quality, and its 1,2-dichloroethane content is about 99.0%, which contains a small amount of impurities such as chloride, acid and water. This kind of 1,2-dichloroethane cannot meet the needs of relevant scientific research experiments, so this kind of 1,2-dichloroethane must be further purified so that its various technical indicators can reach the standard...

Claims

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Application Information

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IPC IPC(8): C07C19/045C07C17/38
Inventor 宋金链张玉芝
Owner 天津市康科德科技有限公司
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