Propylene and propane separation method

A technology of propylene propane and separation method, which is applied in separation methods, dispersed particle separation, adsorption purification/separation, etc. problem, to achieve the effect of significant industrial application prospects, low cost and high adsorption capacity

Active Publication Date: 2019-05-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, adsorption separation technology has attracted widespread attention. This process has small investment, simple operation, low production cost, and has good industrial application prospects. Its core is to develop high-capacity and high-selectivity adsorbent materials, but existing adsorbent materials often exist The incompatibility of high adsorption capacity and high selectivity greatly limits the application of adsorbent materials in the separation of propylene and propane
For example, metal organic framework material Cu-BTC has adsorption capacity of propylene prop

Method used

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  • Propylene and propane separation method
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  • Propylene and propane separation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1mmol Co(BF 4 ) 2 , 1mmol (NH 4 ) 2 GeF 6 and 5 mmol of pyrazine were placed in a strain bottle, 2 ml of water and 1 ml of methanol were added, and stirred at room temperature for 48 h. After suction filtration, the obtained slurry was activated for 24 h under vacuum at 140° C. to obtain GeFSIX-3-Co material.

[0041] Fill the obtained GeFSIX-3-Co material into a 5cm adsorption column, and pass 0.2Mpa of propylene: propane (50:50) mixed gas at 0.5mL / min into the adsorption column at 35°C, and high purity can be obtained in the effluent gas Propane (greater than 99.9%) gas, when propylene breaks through, stops adsorption. The adsorption column adopts vacuum desorption at 100°C to obtain propylene (purity greater than 95%), and the adsorption column can be recycled.

[0042] GeFSIX-3-Co material to CO at 298K 2 Adsorption isotherms such as figure 1 As shown, CO 2 The adsorption isotherm can show that the pore size of the material is about.

[0043] The adsorpt...

Embodiment 2

[0045] 1mmol Ni(BF 4 ) 2 , 1mmol (NH 4 ) 2 SiF 6 and 3 mmol of pyrazine were placed in a strain bottle, 1 ml of water and 2 ml of methanol were added, and stirred at room temperature for 48 h. After suction filtration, the obtained slurry was activated for 24 h under vacuum at 130° C. to obtain SIFSIX-3-Ni material.

[0046] The adsorption isotherms of SIFSIX-3-Ni material for propylene and propane at 298K are as follows: figure 2 shown.

Embodiment 3

[0048] 1mmol Ni(NO 3 ) 2 , 1mmol (NH 4 ) 2 TiF 6 and 10mmol of pyrazine were placed in a strain bottle, after adding 2ml of methanol and 1ml of water, stirred at room temperature for 48h, and after suction filtration of the obtained slurry, it was vacuum activated at 150°C for 24h to obtain TIFSIX-3-Ni material.

[0049] The adsorption isotherms of TIFSIX-3-Ni material for propylene and propane at 298K are as follows image 3 shown.

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Abstract

The invention discloses a propylene and propane separation method, which comprises the following step: an anion-containing hybrid supermicroporous material is used as an absorbent material to contactwith a propylene-propane gas mixture for identification and capture of propylene so as to realize separation of propylene and propane. The anion-containing hybrid supermicroporous material is formed by an inorganic fluorine-containing anion A, a metal ion M and an organic ligand L through a coordination bond, and the general formula is L-M-A. The organic ligand L is pyrazine and its derivative; the inorganic fluorine-containing anion A is any one of NbF7<2->, ZrF6<2->, GeF6<2->, SiF6<2-> and TiF6<2->; and the metal ion M is any one of Co<2+>, Ni<2+>, Fe<2+> and Mn<2+>. The pore diameter of theanion hybrid supermicroporous material is accurately regulated, which exhibits strong action force on propylene; and by controlling rotation degree of F atoms in the pores, propylene is allowed to enter the pore structure and the action force on propane is weak and the propane adsorbing capacity is less, thus realizing separation of propylene and propane.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to a method for the separation of propylene / propane by an anion hybrid ultramicroporous material. Background technique [0002] Propylene is one of the three basic raw materials for synthetic materials next to ethylene. As an important chemical basic raw material, it mainly comes from the by-products of catalytic cracking and steam cracking to produce ethylene. It is mainly used for the production of polypropylene, acrylonitrile, isopropanol, epoxy propane etc. In industrial production, the purity of propylene is crucial to the synthesis of high-quality polypropylene, so the removal of propane in the mixed gas is extremely important for the purification of propylene. At present, 41% of propylene consumption still needs to be met through imports; propane is often used as fuel for engines, etc., so propylene / propane separation is of great significance. [000...

Claims

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Application Information

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IPC IPC(8): C07C7/12C07C9/08C07C11/06B01J20/22B01J20/28B01J20/30B01D53/02
CPCY02C20/40Y02P20/151Y02P20/50
Inventor 邢华斌张照强崔希利
Owner ZHEJIANG UNIV
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