Low eutectic solvent for aromatic hydrocarbon separation and application thereof to extractive distillation

A technology of deep eutectic solvent and extractant, which is applied in the field of deep eutectic solvent and its application in extractive distillation, can solve the problems of complex ionic liquid synthesis method, high price, toxicity, etc., and achieve low toxicity and low price , prepare simple effects

Active Publication Date: 2017-11-03
烟台中科恩吉科创新产业园管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are solutions using ionic liquids in the prior art, but the synthesis method of ionic liquids is complex, expensive and toxic

Method used

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  • Low eutectic solvent for aromatic hydrocarbon separation and application thereof to extractive distillation
  • Low eutectic solvent for aromatic hydrocarbon separation and application thereof to extractive distillation
  • Low eutectic solvent for aromatic hydrocarbon separation and application thereof to extractive distillation

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] Weigh tetrabutylammonium bromide: levulinic acid = 1:2 (molar ratio), stir at 100°C until uniform and transparent to obtain the deep eutectic solvent of the present invention. A benzene-cyclohexane mixture is added to the kettle of the batch extracting and rectifying column, the content of benzene is 40wt%, and the cyclohexane is 60wt%. After heating to total reflux for 1 hour, preheat the deep eutectic solvent as an extractant, and then add it from the upper part of the tower. After continuing total reflux for 1 hour, adjust the reflux ratio. products and transition products. After testing, the content of cyclohexane and benzene products can reach 99%.

Embodiment 2-10

[0027] The experimental procedure is the same as in Example 1, except that there may be differences in hydrogen bond acceptors, hydrogen bond donors, the molar ratio of the two, aromatic hydrocarbons used in the test and their mass fractions. The experimental results are shown in Table 2.

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Abstract

The invention discloses a low eutectic solvent for aromatic hydrocarbon separation. The low eutectic solvent is obtained by mixing hydrogen bond receptors and hydrogen bond donors according to a certain ratio (the molar ratio of 1: 1 to 1:10), and stirring till being in a uniform transparent state at 70-100 DEG C. The low eutectic solvent is low in toxicity, environment-friendly and high in efficiency, and can be applied to the process of separating aromatic hydrocarbons from non-aromatic hydrocarbons in coal tar and petroleum oil.

Description

technical field [0001] The invention relates to the field of extractive distillation in petrochemical industry, in particular to a deep eutectic solvent for separation of aromatics and its application in extractive distillation. Background technique [0002] Aromatic hydrocarbons, referred to as aromatic hydrocarbons, is a general term for benzene and its derivatives, and refers to hydrocarbon compounds containing one or more benzene rings in their molecular structure. The origin of its name is that in the early days of organic chemistry, this type of compound was found in volatile and fragrant substances; later, it usually refers to hydrocarbons containing benzene ring structures in their molecules. Aromatics are mainly derived from coal, tar and petroleum. Aromatic hydrocarbons are insoluble in water but soluble in organic solvents; generally lighter than water, the boiling point increases with the increase of molecular weight; aromatic hydrocarbons are prone to substitut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/08C07C15/04C07C13/18C07C15/06B01D3/40
CPCB01D3/40B01D2202/20C07C7/08C07C15/04C07C13/18C07C15/06
Inventor 白芳李静华超陆平
Owner 烟台中科恩吉科创新产业园管理有限公司
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