A method for separating C4 olefins from ultramicroporous ion-hybrid porous materials

A porous material and ultra-microporous technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of low selectivity and separation selectivity, and achieve simple preparation methods, easy-to-obtain raw materials, and low cost low effect

Active Publication Date: 2020-09-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary metal-organic framework materials are used to separate C4 olefins, although they have high capacity, but the selectivity is very low or even no selectivity, such as a Zr 4+ As the metal site, 1,3,5-trisubstituted benzene-4,4,4-naphthalene benzoic acid is used as the metal ligand to synthesize ZJNU-30a, which has a certain adsorption capacity for C4 olefins, but the separation selectivity is low ( 1.15) (A Porous Zirconium-Based Metal-Organic Framework with the Potential for the Separation of ButeneIsomers, Chemistry-A European Journal, 2016, 22(42): 14988-14997)

Method used

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  • A method for separating C4 olefins from ultramicroporous ion-hybrid porous materials
  • A method for separating C4 olefins from ultramicroporous ion-hybrid porous materials
  • A method for separating C4 olefins from ultramicroporous ion-hybrid porous materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] NiSiF was synthesized by solvothermal method 6 ·6H 2 O and pyrazine were dissolved in methanol solvent and reacted for 3 days to obtain crystals. The obtained crystals were vacuum-dried at 120°C for 6 hours, washed with methanol, and filtered with suction. The obtained product was vacuum desorbed at 100°C for 12 hours to obtain SIFSIX-3-Ni material.

[0055] The adsorption isotherms of SIFSIX-3-Ni material to 1,3-butadiene, 1-butene and isobutene at 298K are as follows: figure 1 shown.

Embodiment 2

[0057] The SIFSIX-3-Ni material obtained in Example 1 was filled into a 5cm adsorption column, and 0.1Mpa of isobutene: 1-butene: 1,3-butadiene: He (30: 15: 50: 5 ) mixed gas is passed into the adsorption column at 0.5mL / min, high-purity isobutene (greater than 99.999%) gas can be obtained in the effluent gas, and when 1,3-butadiene breaks through, the adsorption is stopped. The adsorption column adopts vacuum desorption at 80°C to obtain a mixed gas of 1,3-butadiene and 1-butene, and the adsorption column can be recycled. Breakthrough curves such as figure 2 shown.

Embodiment 3

[0059] At 10°C, 1,3-butadiene: isobutene (50:50) mixed gas was introduced into the adsorption column of Example 2 at 1 mL / min, and high-purity isobutene (greater than 99.999%) gas could be obtained in the effluent gas. When 1, When 3-butadiene breaks through, the adsorption stops. The adsorption column adopts vacuum desorption at 100° C. to obtain 1,3-butadiene (greater than 90%), and the adsorption column can be recycled.

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Abstract

The invention discloses a method of using an ultra-micropore ion-hybridized porous material to separate C4 alkenes. The ultra-micropore ion-hybridized porous material is taken as an adsorbent and is contacted with a C4 alkene mixture so as to separate C4 alkenes from the mixture. The ultra-micropore ion-hybridized porous material is prepared from inorganic fluorine containing negative ions, metalions, and a pyrazine derivative organic ligand through coordination bonds; and is contacted with the C4 alkene mixture to separate C4 alkenes from the mixture. The pore diameter of the ultra-microporeion-hybridized porous material can be precisely controlled to selectively identify C4 alkene molecules, and selective separation of C4 alkenes can be realized.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to a method for separating C4 olefins. Background technique [0002] Carbon four (C4) olefins are rich in resources, mainly from hydrocarbon steam cracking to produce ethylene by-products and petroleum refining catalytic cracking by-products, followed by a small amount from natural gas and recovered gas from oil fields, mainly including 1,3-butadiene, 1-butane ene, 2-butene and isobutene. C4 olefins have important application value in the chemical industry. For example, the C4 fraction of petroleum refining is mainly used to produce alkylated gasoline and fuel, and the 1,3-butadiene in the C4 fraction of steam cracking is mainly used as rubber raw materials. In addition, Other C4 olefins are used to produce butanol / ketone / aldehyde and oil blending components, such as 1-butene is mainly used to produce 1,2-butanediol, sec-butanol, butadiene, n-butanol, methyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/12C07C11/08C07C11/167C07C11/09C07F15/04C07F15/06C07F15/02C07F3/06C07F1/08B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01J20/223C07C7/12C07F1/08C07F3/06C07F15/02C07F15/04C07F15/06C07C11/08C07C11/167C07C11/09Y02P20/50
Inventor 邢华斌张照强杨启炜张治国鲍宗必赵宁
Owner ZHEJIANG UNIV
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