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A kind of separation method of C8 aromatic hydrocarbon isomer mixture

A technology for isomers and C8 aromatic hydrocarbons, which is applied in the field of separation of C8 aromatic hydrocarbon isomer mixtures, can solve the problems of low adsorption capacity and poor molecular recognition ability, and achieves high separation selectivity and pore structure. Adjustable, force-adjustable effects

Active Publication Date: 2021-03-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing MOFs materials have problems such as poor molecular recognition ability and low adsorption capacity for the separation of C8 aromatics, so it is urgent to develop new separation materials and separation methods

Method used

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  • A kind of separation method of C8 aromatic hydrocarbon isomer mixture
  • A kind of separation method of C8 aromatic hydrocarbon isomer mixture
  • A kind of separation method of C8 aromatic hydrocarbon isomer mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 4,4'-bisinin in ethylene glycol, weigh 0.27 g cu (BF 4 ) 2 XH 2 O and 0.20g (NH 4 ) 2 SIF 6 Soluble in water, mixed with the above two solutions, then heated to 60 to 70 ° C for 1 to 12 hours, obtained product SiFSIX-1-Cu filtration was washed with methanol, and then vacuum activated at 25 ~ 80 ° C. ~ 6 hours, the activated SIFSIX-1-Cu material was obtained.

[0052] SIFSIX-1-Cu material on the adsorption of xylene isomers and ethylbenzene in 333k figure 1 Indicated.

Embodiment 2

[0054] The SIFSIX-1-Cu prepared in Example 1 was loaded into a 5 cm suction column, and the nitrogen bubble was used to obtain a nitrobenzene, a metallylene, a neighbornebenzene and ethyl benzene (mass ratio 1: 1: 1: 1) Mixture, then pass the mixture into the adsorption column at 20 ~ 40mL / min flow rate, the adsorption column operating temperature is 60 degrees Celsius, the penetration data curve is figure 2 As shown, high purity to xylene gas can be obtained in the outflow gas.

Embodiment 3

[0056] Three-component mixture containing xylene, male, xylene, and neighborne (mass ratio of 1: 1: 1) was obtained using a nitrogen bubble mode, and then mixed with a mixture of 20 to 40 ml / min. 2 In the adsorption column, the adsorption column has a temperature of 60 degrees Celsius, and high purity to xylene (greater than 99.9%, mass percent) gas can be obtained in the outflow gas.

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Abstract

The invention discloses a method for separating isomer mixtures of C8 aromatic hydrocarbons. An anionic pillared microporous material with a large pore size is used as an adsorbent, and the mixture of C8 aromatic hydrocarbon isomers is contacted with the adsorbent to realize carbon Selective adsorption and separation of octaaromatic isomer mixtures; the anionic pillared microporous material is a porous material formed by a metal ion M, an inorganic anion A and an organic ligand L through a coordination bond, and the general formula is [MAL 2 ] n , wherein n>4 and is an integer; the metal ion M is Fe 2+ 、Co 2+ 、Ni 2+ or Cu 2+ ; The inorganic anion A is SiF 6 2‑ , NbOF 5 2‑ , TaF 7 2‑ , ZrF 6 2‑ 、TiF 6 2‑ 、GeF 6 2‑ , SO 3 CF 3 ‑ or NbF 6 ‑ ; The organic ligand L is selected from the following structures:

Description

Technical field [0001] The present invention relates to the field of chemical engineering, and more particularly to a separation method of a carbon avium-octafin homomeric mixture. Background technique [0002] P-Xylene, PX) is a basic organic chemical raw material, which is mainly used for synthesis of terephthalic acid (PTA), and PTA is a production polyester, especially polyethylene terephthalate (PET). Raw materials. As the global polyester demand has increased, the demand for PX grows rapidly. In recent years, China has become a PX consumption and imported great country. In 2017, the annual PX consumption reached 23.85 million tons, and consumption increased by 11.67%. The import volume accounted for 60%, mainly from Japan and South Korea. [0003] The mixed carbon eight aromatic hydrocarbon mainly comes from steam cleavage, catalytic reforming and toluene disproportionation, mainly including dimethylbenzene bisomers (PX, male (MX), o-xylene (OX)) and ethylbenzene (EB) . Iso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/12C07C15/08C07C15/073B01D53/04
CPCC07C7/12B01D53/04C07C15/08C07C15/073Y02P20/50B01D2253/204B01D2257/70B01D53/0423
Inventor 邢华斌崔希利
Owner ZHEJIANG UNIV
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