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Method for purifying chromatographic grade butyl acetate

A technology of butyl acetate and a purification method, which is applied in the field of purification of chromatographic grade butyl acetate, and achieves the effects of simple method, easy separation, and reduced energy consumption

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

This kind of butyl acetate cannot meet the needs of relevant scientific research experiments, and must be further purified so that all technical indicators after purification can meet the requirements of chromatographic grade indicators before it can be used

Method used

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  • Method for purifying chromatographic grade butyl acetate

Examples

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Embodiment 1

[0025] A purification method of chromatographic grade butyl acetate, the steps are as follows:

[0026] (1) Lift the raw material butyl acetate (99.0% content) to the top of the adsorption column, where the adsorption column is 1.6M in height, 4.2cm in diameter, and contains activated carbon with a particle size of about 20 mesh to 80 mesh and active oxidation of 50 mesh to 100 mesh Aluminum adsorbent, the column capacity is 4 / 5 of the column height, and the raw material flows through two series-connected adsorption columns at a speed of 50mL / min for adsorption and removal of impurities;

[0027] In the column, butyl acetate is in full contact with activated carbon and activated alumina adsorbents to remove organic impurities by adsorption, and detect the quality of the adsorbed effluent. Its specific technical index requirements are shown in Table 1) and then enter the next step operation, and remove the fraction before adsorption with high impurity.

[0028] (2) Enter the e...

Embodiment 2

[0033] A kind of purification method of chromatographic grade butyl acetate for scientific research, the steps are as follows:

[0034] (1) Lift the raw material butyl acetate (99.0% content) to the top of the adsorption column. The adsorption column is 1.6M in height and 4.2cm in diameter. Aluminum adsorbent, the column capacity is 4 / 5 of the column height, and the raw material flows through two series-connected adsorption columns at a speed of about 100mL / min for adsorption and removal of impurities;

[0035] In the column, butyl acetate is in full contact with activated carbon and activated alumina adsorbents to remove organic impurities by adsorption, and detect the quality of the adsorbed effluent. Its specific technical index requirements are shown in Table 1) and then enter the next step operation, and remove the fraction before adsorption with high impurity.

[0036] (2) Put the effluent in step (1) into the drying column. The specifications and loading capacity of th...

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Abstract

The invention relates to a method for purifying chromatographic grade butyl acetate. The method comprises the following steps of: absorbing a raw material, namely butyl acetate by using activated carbon and an activated alumina column to remove organic impurities, calcium hydride or magnesium sulfate, drying and dehydrating, rectifying, filtering, further removing impurities, and performing nitrogen-infilling packaging to obtain a high purity liquid chromatography (HPLC) grade butyl acetate product. By the method, a chromatographic grade butyl acetate product with the purity of more than 99.9 percent can be obtained, the yield is over 93 percent, the qualification rate is over 93 percent, and application requirements of customers of a HPLC reagent butyl acetate on aspects such as scientific experiments, subject research and the like can be met; meanwhile, compared with the conventional method, the invention has the advantages that: the product has high purity and stable quality, and the method is easy to operate and is suitable 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 organic solvents, in particular to a method for purifying chromatographic grade butyl acetate. Background technique: [0002] Butyl acetate is an excellent organic solvent. It is used as a solvent in the processing of the chemical industry; it is used as an extraction agent in the petroleum industry and pharmaceuticals; it is used in chemical experiments to test thallium, tin and tungsten, and to determine molybdenum and rhenium; high-purity solvents are mainly used in scientific research experiments and research projects aspect. [0003] The butyl acetate reagent sold on the market has a butyl acetate content of about 99.3%, which contains a small amount of impurities such as acetic acid, butanol, amyl acetate, hexyl acetate and water. This kind of butyl acetate cannot meet the needs of relevant scientific research experiments, and must be furthe...

Claims

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Application Information

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IPC IPC(8): C07C69/14C07C67/48
Inventor 宋金链张玉芝
Owner 天津市康科德科技有限公司
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