Composition as well as preparation method and application thereof
A technology of composition and azeotrope, which is applied in the field of extractive rectification, can solve the problems of high solubility of extractant, difficult separation of azeotrope, volatile recovery and energy consumption, etc., and achieves the effect of saving cost
Pending Publication Date: 2022-06-24
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the existing problems in the prior art that the separation of azeotropic mixtures is difficult, the solubility of extractants in azeotropic mixtures is large, easy to volatilize and recover energy consumption is high, and to provide a composition and its preparation method and application. The composition includes a hydrogen bond donor and a hydrogen bond acceptor, and has the characteristics of wide liquid range, low volatility, non-toxic, harmless, good biocompatibility, biodegradability and easy preparation. In addition, the composition can improve The relative volatility of the second component in the azeotropic mixture, such as the relative volatility of ethylene glycol in the ethylene glycol-1,2-butanediol system, and reduce the solvent ratio, the first component obtained after extraction and rectification and the purity and yield of the second component are greater than 99.9 (weight), and the composition can also be recycled, thereby performing continuous extraction and rectification separation, saving costs, and can be applied industrially
Method used
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Examples
Experimental program
Comparison scheme
Effect test
preparation example 1
[0043] Weigh the hydrogen bond donor n-hexanoic acid and hydrogen bond acceptor tetrabutylammonium bromide (the molar ratio of n-hexanoic acid and tetrabutylammonium bromide is 1:1) in the container, and weigh the n-hexanoic acid and tetraethyl bromide. The mixture of ammonium chloride is heated, the heating temperature is 80 ° C, and the stirring is carried out (stirring speed is 200 rev / min) while heating. Stirring was stopped to obtain the composition.
preparation example 2
[0045] The composition was prepared according to the method of Preparation Example 1, except that the molar ratio of n-hexanoic acid and tetrabutylammonium bromide was 2:1, and the heating temperature was 100°C.
preparation example 3
[0047] The composition was prepared according to the method of Preparation Example 1, except that the molar ratio of n-hexanoic acid and tetrabutylammonium bromide was 5:1, and the heating temperature was 120°C.
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The invention relates to the field of extractive distillation, and discloses a composition and a preparation method and application thereof.The composition comprises a hydrogen bond donor and a hydrogen bond acceptor, and the hydrogen bond donor is selected from at least one of organic acid, alcohol and amide compounds; the hydrogen bond acceptor is selected from at least one of quaternary ammonium salts. The composition has the characteristics of wide liquid range, low volatility, no toxicity, harmlessness, good biocompatibility, biodegradability and easiness in preparation, and the purity and yield of the first component and the second component obtained after extractive distillation are greater than 99.9% (by weight).
Description
technical field [0001] The invention relates to the field of extractive rectification, in particular to a composition and a preparation method and application thereof. Background technique [0002] As an important chemical raw material, ethylene glycol is widely used in pesticides, medicine, petroleum and other industries. The excellent properties of ethylene glycol have attracted widespread attention. The production methods of ethylene glycol mainly include petroleum routes and non-petroleum routes. There are three main production processes for ethylene glycol by petroleum ethylene method, namely ethylene oxide (EO) hydration method, ethylene oxide synthesis ethylene glycol process through intermediates and ethylene glycol co-production of dimethyl carbonate method. There are two main production processes for non-petroleum routes, namely direct synthesis and indirect synthesis. The direct synthesis method is the simplest and most effective method. However, the reaction co...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C07C29/84C07C31/20B01D3/40
CPCC07C29/84B01D3/40C07C31/202C07C31/207
Inventor 马守涛朱云峰姜杰徐伟文松
Owner CHINA PETROLEUM & CHEM CORP
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