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Chromatographically pure ethyl alcohol and preparation method and production system thereof

A production system and chromatographically pure technology, applied in the field of production systems, chromatographically pure ethanol and its preparation method, can solve the problems of high price, high cost, complicated purification process, etc., and achieve high yield, low production cost and good quality Effect

Inactive Publication Date: 2017-12-22
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chromatographically pure ethanol is one of the commonly used mobile phases for liquid chromatography. 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 ethanol. For users, it will lead to excessive cost consumption
[0003] At present, there are few ethanol purification processes reported in China, and the existing purification processes are relatively complicated and costly. The chromatographic pure ethanol process has long been monopolized by foreign countries

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  • Chromatographically pure ethyl alcohol and preparation method and production system thereof
  • Chromatographically pure ethyl alcohol and preparation method and production system thereof
  • Chromatographically pure ethyl alcohol and preparation method and production system thereof

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preparation example Construction

[0028] The embodiment of the present invention provides a kind of preparation method of chromatographic pure ethanol, it comprises:

[0029] S1. Using industrial grade ethanol as a raw material, reacting with concentrated sulfuric acid, neutralizing and filtering to obtain the first reaction liquid.

[0030] Ethanol is a flammable, volatile, colorless and transparent liquid at normal temperature and pressure. It has low toxicity and cannot be drunk directly in pure liquid. It has a special fragrance and is slightly irritating. It is flammable, its vapor can form explosive mixture with air, and it can be miscible with water in any ratio. Industrial-grade ethanol contains many impurities such as amines, aldehydes, ketones, esters, etc., which need to be removed separately to obtain chromatographically pure ethanol.

[0031] Concentrated sulfuric acid can form salts with amine compounds in industrial grade ethanol, so as to achieve the purpose of removing amine compounds. Howev...

Embodiment 1

[0057] Present embodiment 1 provides a kind of production system 100 of chromatographically pure ethanol, with reference to figure 1 As shown, it includes: a reaction kettle 110 , a circulation pump 120 , a mixer 131 , a filter column 132 , an activated carbon adsorption column 133 and a rectification tower 140 .

[0058] Among them, the mixer 131 , the filter column 132 , and the activated carbon adsorption column 133 are arranged in parallel, and respectively form a circulation pipeline with the circulation pump 120 and the reaction kettle 110 . Further, the input end of the circulation pump 120 is communicated with the liquid phase outlet at the bottom of the reactor 110, and the output end of the circulation pump 120 is respectively communicated with the feed end of the mixer 131, filter column 132, and activated carbon adsorption column 133, and the mixer 131 , the feeding ends of the filter column 132 and the activated carbon adsorption column 133 are all provided with v...

Embodiment 2

[0065] The present embodiment provides a kind of chromatographically pure ethanol, and its preparation method is as follows:

[0066] S1. import 50L of industrial-grade ethanol (Jinzhou Petrochemical, purity ≥ 98wt%) raw material in the reactor 110, drip the concentrated sulfuric acid of 1mol% in the reactor 110 through the dripping tank 112, open the valve of the mixer 131, and establish The circulation between the reaction kettle 110, the circulation pump 120 and the mixer 131, the circulation time is 3h.

[0067] S2. Close the valve of the mixer 131, add calcium bicarbonate into the reaction kettle 110, and raise the temperature to 60°C.

[0068] S3. Open the valve of the filter column 132, establish the circulation between the reactor 110, the circulation pump 120 and the filter column 132, control the flow rate to 0.1 m / s, and the cycle time to be 3 hours.

[0069] S4. Close the valve of the filter column 132, add 5 mol% 2,4-dinitrophenylhydrazine into the reactor 110, a...

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Abstract

Chromatographically pure ethyl alcohol 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 sequentially reacts with concentrated sulfuric acid, 2,4-dinitrophenylhydrazine, aluminium powder and first alkali, so that such impurities as amine, aldehyde, ketone and ester in industrial ethyl alcohol are removed; and meanwhile, product purification is performed through such operations as filtration, activated carbon adsorption and rectification to obtain the high-purity chromatographically pure ethyl alcohol. The preparation method is low in production cost, can prepare the chromatographically pure ethyl alcohol with good quality and high yield, and meets the requirements of chromatographically pure reagents. The production system comprises a mixer, a filter 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 alcohol, is high in production efficiency, can obtain the product with high purity, and can realize large-scale industrial production of the chromatographically pure ethyl alcohol.

Description

technical field [0001] The invention relates to the technical field of purification of chemical products, in particular to a chromatographically pure ethanol, 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 ethanol is one of the commonly used mobile phases for liquid chromatography. 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 ethanol. For users, it wi...

Claims

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Application Information

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IPC IPC(8): C07C29/74C07C31/08
CPCC07C29/74C07C31/08
Inventor 覃彩芹文胜郑根稳龚春丽赵正崇程凡董浩
Owner HUBEI ENG UNIV