Chromatographically pure ethyl ether and preparation method and production system thereof

Abstract

Chromatographically pure ethyl ether and a preparation method and a production system thereof relate to the technical field of purification of chemical products. The preparation method is characterized in that industrial ethyl alcohol serves as a raw material and is subjected to oxidation impurity removal and a neutral reaction at first and then 4A molecular sieve adsorption, calcium hydride adsorption, basic alumina adsorption and activated carbon adsorption to obtain a rectifying stock solution, and at last, the rectifying stock solution is rectified. The preparation method is low in production cost, can prepare the chromatographically pure ethyl ether with good quality and high yield, and meets the requirements of chromatographically pure reagents. The production system comprises a 4A molecular sieve column, a calcium hydride column, a basic alumina column and an activated carbon adsorption column which are arranged in parallel and constitute a circulation line with a reaction kettle, and a gas-phase outlet of the reaction kettle is communicated with a gas-phase inlet in the bottom of a rectifying column. The production system is specially used for preparing the chromatographically pure ethyl ether, is high in production efficiency, can obtain the product with high purity, and can realize large-scale industrial production of the chromatographically pure ethyl ether.

Description

technical field [0001] The invention relates to the technical field of purification of chemical products, in particular to a chromatographically pure ether, a preparation method and a production system thereof. Background technique [0002] Chromatographically pure refers to the standard reagents used in chromatographic analysis. Its ultraviolet absorbance at low wavelengths is relatively low. Under chromatographic conditions, only peaks of specified compounds appear, and impurity peaks cannot appear. In addition to the high content, it also has high requirements for fine dust and moisture, which belongs to the category of high-purity reagents. Chromatographically pure ether is one of the commonly used mobile phases for liquid chromatography, and its domestic chromatographically pure market is mostly monopolized by foreign reagent companies, such as Merck, Sigma, Fisher, Tedia, etc. Their products are expensive, compared to chromatographically pure For users, it will lead t...

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Problems solved by technology

Chromatographically pure ether is one of the commonly used mobile phases for liquid chromatography, and its domestic chromatographically pure market is mostly monopolized by foreign reagent companies, such as Merck, Sigma, Fisher, Tedia, etc. Their products are expensive, compared to chromatographically pure For users, it will lead to excessive cost consumption

[0003] At present, there are few ether purification processes reported in China, and the existing purification processes are relatively complicated and costly. The chromatographic pure ether process has long been monopolized by foreign countries.

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