Gly-Ni-dobdc adsorbent, and preparation method and application thereof

A technology of gly-ni-dobdc and adsorbent, which is applied in the field of Gly-Ni-dobdc adsorbent and its preparation, can solve the problem of unsatisfactory separation effect of mixed gas, and achieve the effect of easy realization, good repeatability and simple operation

Active Publication Date: 2020-07-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to aim at the existing 2 h 4 / C 2 h 6 The separated MOFs materials have similar adsorption capacity for ethylene and ethane, and for C 2 h 4 / C 2 h 6 Unsatisfactory separation effect of mixed gas

Method used

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  • Gly-Ni-dobdc adsorbent, and preparation method and application thereof
  • Gly-Ni-dobdc adsorbent, and preparation method and application thereof
  • Gly-Ni-dobdc adsorbent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Gly (0.52mmol, n 1 ) and Ni(CH 3 COO) 2 4H 2 O(5.2mmol, n 2 ) dissolved in deionized water (30ml, n 3 ), fully stirred to obtain Gly and Ni 2+ Mixed solution; 2,5-dihydroxyterephthalic acid (dobdc, 2.63mmol, n 4 ) dissolved in tetrahydrofuran (35ml, n 5 ), fully stirred to obtain dobdc solution. The proportion of the amount of each substance is n 1 :n 2 :n 4 = 0.1:1:0.5; n 3 :n 5 =1:1.2

[0036] (2) Add the dobdc solution obtained in step (1) to Gly and Ni 2+ In the mixed solution, stir and mix evenly to obtain a reaction solution, transfer it to a reaction kettle, put it in a constant temperature drying oven at 100°C, and react for 65 hours to obtain a reaction product, filter the solution with an organic filter membrane, and soak the solid product in ethanol , filtered and dried to give a brown solid powder.

[0037] (3) Vacuum activate the solid powder obtained in step (2) at 200°C for 12 hours to obtain the Gly-Ni-dobdc adsorbent material, denoted...

Embodiment 2

[0039] (1) Gly (1.56mmol, n 1 ) and Ni(CH 3 COO) 2 4H 2 O(5.2mmol, n 2 ) dissolved in deionized water (35ml, n 3 ), fully stirred to obtain Gly and Ni 2+ Mixed solution; 2,5-dihydroxyterephthalic acid (dobdc, 2.34mmol, n 4 ) dissolved in tetrahydrofuran (35ml, n 5 ), fully stirred to obtain dobdc solution. The proportion of the amount of each substance is n 1 :n 2 :n 4 =0.3:1:0.45; n 3 :n 5 =1:1

[0040] (2) Add the dobdc solution obtained in step (1) to Gly and Ni 2+ In the mixed solution, stir and mix evenly to obtain a reaction solution, transfer it to a reaction kettle, put it in a constant temperature drying oven at 110°C, and react for 75 hours to obtain a reaction product, filter the solution with an organic filter membrane, and soak the solid product in ethanol , filtered and dried to give a brown solid powder.

[0041] (3) Vacuum activate the solid powder obtained in step (2) at 250°C for 8h to obtain Gly-Ni-dobdc adsorbent material, denoted as Gly 0.3...

Embodiment 3

[0043] (1) Gly (2.6mmol, n 1 ) and Ni(CH 3 COO) 2 4H 2 O(5.2mmol, n 2 ) dissolved in deionized water (40ml, n 3 ), fully stirred to obtain Gly and Ni 2+ Mixed solution; 2,5-dihydroxyterephthalic acid (dobdc, 3.64mmol, n 4 ) dissolved in tetrahydrofuran (35ml, n 5 ), fully stirred to obtain dobdc solution. The proportion of the amount of each substance is n 1 :n 2 =0.5:1:0.7; n 3 :n 5 =1:0.9

[0044] (2) Add the dobdc solution obtained in step (1) to Gly and Ni 2+ In the mixed solution, stir and mix evenly to obtain a reaction solution, transfer it to a reaction kettle, put it in a constant temperature drying oven at 115°C, and react for 70 hours to obtain a reaction product, filter the solution with an organic filter membrane, and soak the solid product in ethanol , filtered and dried to give a brown solid powder.

[0045] (3) Vacuum activate the solid powder obtained in step (2) at 220°C for 10 hours to obtain the Gly-Ni-dobdc adsorbent material, denoted as Gly ...

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Abstract

The invention discloses a Gly-Ni-dobdc adsorbent, and a preparation method and an application thereof. The preparation method comprises the following steps: (1) dissolving glycine and Ni(CH3COO)2.4 H2O in water to obtain a mixed solution of glycine and Ni<2+>; (2) dissolving 2,5-dihydroxyterephthalic acid in tetrahydrofuran to obtain a 2,5-dihydroxyterephthalic acid solution; and (3) adding the 2,5-dihydroxyterephthalic acid solution into the mixed solution of glycine and Ni<2+>, carrying out a hydrothermal reaction, filtering, soaking with ethanol, and carrying out vacuum activation to obtainthe Gly-Ni-dobdc adsorbent. Compared with M2(dobdc) (M: Co, Mg, Ni) materials, the Gly-Ni-dobdc adsorbent provided by the invention has stronger C2H4 / C2H6 adsorption selectivity, and has a better application prospect in C2H4 / C2H6 mixed gas separation.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a Gly-Ni-dobdc adsorbent and a preparation method and application thereof. Background technique [0002] Ethylene (C 2 h 4 ) is an important basic chemical raw material. It is mainly used as a monomer material for the preparation of organic polymers, and can also be used as an intermediate to synthesize other organic polymers. Ethylene products account for more than 75% of petrochemical products and occupy an important role in the national economy. status. C is mainly produced industrially through steam cracking and thermal decomposition of naphtha or hydrocarbons. 2 h 4 , but the resulting product is mixed with a certain amount of impurities, such as ethane (C 2 h 6 )Wait. due to C 2 h 6 and C 2 h 4 With extremely similar physical properties, the difference in relative volatility is very small, it is difficult to compare C 2 h 4 / C 2 h 6 C...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01D53/02C07C7/12C07C11/04C07C9/06
CPCB01J20/22B01J20/226B01D53/02C07C7/12C07C11/04C07C9/06
Inventor 李忠吕振强周欣戴琼斌刘宏斌张婧瑶
Owner SOUTH CHINA UNIV OF TECH
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