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A kind of adsorbent for separating propylene and propane and preparation method thereof

An adsorbent and propane technology, which is applied in the field of adsorbent for separating propylene and propane and its preparation, can solve the problems of insufficient selectivity, unstable and stable water vapor, etc., and achieves good repeatability, short reaction time, and strong adsorption selectivity. Effect

Active Publication Date: 2021-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the existing MOFs materials, most of which are C 3 h 6 / C 3 h 8 The selectivity of the separation is not high enough or there is a problem of water vapor instability and stability, providing a preparation with high C 3 h 6 / C 3 h 8 Selectivity and good water vapor stability of pyrrole@Cu-BTC and urazole@Cu-BTC composite adsorbents

Method used

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  • A kind of adsorbent for separating propylene and propane and preparation method thereof
  • A kind of adsorbent for separating propylene and propane and preparation method thereof
  • A kind of adsorbent for separating propylene and propane and preparation method thereof

Examples

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Embodiment 1

[0040] A preparation method for an adsorbent for separating propylene and propane, comprising the steps of:

[0041] (1) Add ZnO (3.6mmol) into deionized water (volume 16ml), ultrasonically disperse uniformly, and the time for ultrasonically disperse uniformly is 10min, then add N,N-dimethylformamide (DMF, volume 16ml) , mixed evenly to obtain a ZnO nano-slurry solution; the Cu(NO 3 ) 2 ·3H 2 O (7.2mmol) was added in the ZnO nano-slurry solution, and mixed uniformly to obtain a mixed nano-slurry; the volume ratio of the deionized water to N,N-dimethylformamide was 1:1; the ZnO and Cu (NO 3 ) 2 ·3H 2 The molar ratio of O is 1:2;

[0042] (2) Add small organic molecule modification reagents (pyrrole is selected for use in Example 1, 1.44mmol with absorption) and trimesic acid (3.2mmol) into absolute ethanol (16ml), mix well to obtain a mixed solution;

[0043] (3) Add the mixed nano-slurry described in step (1) into the mixed solution described in step (2), mix evenly, an...

Embodiment 2

[0045] A preparation method for an adsorbent for separating propylene and propane, comprising the steps of:

[0046] (1) Add ZnO (5.76mmol) into deionized water (volume 16ml), ultrasonically disperse uniformly, and the time for ultrasonically disperse uniformly is 10min, then add N,N-dimethylformamide (DMF, volume 19ml) , mixed evenly to obtain a ZnO nano-slurry solution; the Cu(NO 3 ) 2 ·3H 2 O (7.2mmol) was added in the ZnO nano-slurry solution, and mixed uniformly to obtain a mixed nano-slurry; the volume ratio of the deionized water to N,N-dimethylformamide was 16:19; the ZnO and Cu (NO 3 ) 2 ·3H 2 The molar ratio of O is 1:1.25;

[0047] (2) Add the organic small molecule modification reagent (pyrrole is selected in embodiment 2, and the absorption is 6.48mmol) and trimesic acid (3.2mmol) in absolute ethanol (16ml), mix well to obtain a mixed solution;

[0048] (3) Add the mixed nano-slurry described in step (1) into the mixed solution described in step (2), mix ev...

Embodiment 3

[0050] A preparation method for an adsorbent for separating propylene and propane, comprising the steps of:

[0051] (1) Add ZnO (3.6mmol) into deionized water (volume 16ml), ultrasonically disperse uniformly, and the time for ultrasonically disperse uniformly is 10min, then add N,N-dimethylformamide (DMF, volume 16ml) , mixed evenly to obtain ZnO nano-slurry solution; Cu(NO 3 ) 2 ·3H 2 O (7.2mmol) was added in the ZnO nano-slurry solution, and mixed uniformly to obtain a mixed nano-slurry; the volume ratio of the deionized water to N,N-dimethylformamide was 1:1; the ZnO and Cu (NO 3 ) 2 ·3H 2 The molar ratio of O is 1:1.25;

[0052] (2) Small organic molecule modification reagent (Urazole is selected for use in Example 3, 1.44mmol by absorption) and trimesic acid (3.2mmol) are added in absolute ethanol (21ml), and mixed uniformly to obtain a mixed solution;

[0053] (3) Add the mixed nano-slurry described in step (1) into the mixed solution described in step (2), mix e...

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Abstract

The invention discloses an adsorbent for separating propylene and propane and a preparation method thereof. The method comprises: adding ZnO into water, mixing well, adding N,N-dimethylformamide, mixing well to obtain ZnO nano slurry solution; adding Cu(NO 3 ) 2 ·3H 2 O was added to the ZnO nano-pulp solution, and mixed to obtain a mixed nano-slurry; organic small molecule modification reagents and trimesic acid were added to ethanol, and mixed to obtain a mixed liquid; the mixed nano-slurry was added to the mixed liquid, and mixed , standing still for synthesis reaction, filtering, raising the temperature of the precipitate in vacuum for activation treatment, and obtaining the adsorbent for separating propylene and propane. Due to the introduction of pyrrole or urazole, the adsorbent obtained by the present invention has enhanced its ability to C 3 h 6 Adsorption, increase C 3 h 6 / C3H8 also enhances the water vapor stability of the material, at C 3 h 6 / C 3 h 8 Adsorption separation has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of adsorbent materials, and in particular relates to an adsorbent for separating propylene and propane and a preparation method thereof. Background technique [0002] Propylene is a key raw material for many fossil products, second only to ethylene in importance, and is an essential building block in the manufacture of various chemicals such as polypropylene and acrylonitrile. According to statistics, global propylene consumption reached 96 million tons in 2015 and will reach 120 million tons in 2020. Generally, propylene is produced from fossil fuel cracking at high temperatures or refinery dry gas, which contains less-absorbing propane. In order to obtain high-purity propylene, it is necessary to separate propylene and propane. At present, the main separation method is cryogenic distillation. Due to the close boiling points of propylene (47.6°C) and propane (42.2°C), the separation and purification proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02C07C7/12C07C9/08C07C11/06
CPCB01D53/02B01J20/22B01J20/226B01J20/28011C07C7/12C07C9/08C07C11/06
Inventor 李忠孙艺薇周欣夏启斌肖静吴玉芳唐瑜佞
Owner SOUTH CHINA UNIV OF TECH
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