Preparation method and application of coumarin functionalized photoresponse adsorbent

A coumarin, light-responsive technology, used in chemical instruments and methods, refined hydrocarbon oil, other chemical processes, etc., can solve the problem of inability to modulate surface properties, and achieve the effect of increased adsorption capacity and large specific surface area

Pending Publication Date: 2021-02-26
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pore structure and surface properties of traditional adsorbents cannot be adjusted, and it is difficult to meet the above requirements at the same time

Method used

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  • Preparation method and application of coumarin functionalized photoresponse adsorbent
  • Preparation method and application of coumarin functionalized photoresponse adsorbent
  • Preparation method and application of coumarin functionalized photoresponse adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of a coumarin-functionalized light-responsive adsorbent, comprising the following steps:

[0030] (1) To prepare the adsorbent carrier MIL-101-Cr, weigh 1.63kg of chromium nitrate nonahydrate and 0.7kg of terephthalic acid to dissolve in 20L of deionized water, then add 0.2kg of 40% hydrofluoric acid, and synthesize in hydrothermal React in the reactor at 180°C for 8 hours, cool to room temperature, filter, wash three times with N,N-dimethylformamide and ethanol, and dry. The product is the adsorbent carrier MIL-101-Cr:

[0031] (2) Deprotonate the coumarin molecules, weigh 0.049kg of coumarin molecules and dissolve them in 7L of methanol, weigh 0.0648kg of sodium methoxide and dissolve them in 20L of methanol, mix them, reflux at 67°C for 3 hours, and coumarin The deprotonation of the prime molecule is completed;

[0032] (3) Dissolve 0.196kg of the adsorbent carrier MIL-101-Cr in 3L of methanol and stir. In order to speed up the dissolution rate,...

Embodiment 2

[0037] A preparation method of a coumarin-functionalized light-responsive adsorbent, comprising the following steps:

[0038] (1) To prepare the adsorbent carrier MIL-101-Cr, weigh 1.63kg of chromium nitrate nonahydrate and 0.7kg of terephthalic acid to dissolve in 20L of deionized water, then add 0.2kg of 40% hydrofluoric acid, and synthesize in hydrothermal React in the reactor at 180°C for 8 hours, cool to room temperature, filter, wash with N,N-dimethylformamide and ethanol three times, and dry. The product is the adsorbent carrier MIL-101-Cr:

[0039] (2) Deprotonate the coumarin molecules, weigh 0.098kg of coumarin molecules and dissolve them in 20L of methanol, weigh 0.0648kg of sodium methoxide and dissolve them in 20L of methanol, mix them, reflux at 67°C for 3h, and coumarin The deprotonation of the prime molecule is completed;

[0040](3) Dissolve 0.196kg of the adsorbent carrier MIL-101-Cr in 3L of methanol and stir. In order to speed up the dissolution rate, heat...

Embodiment 3

[0045] A preparation method of a coumarin-functionalized light-responsive adsorbent, comprising the following steps:

[0046] (1) To prepare the adsorbent carrier MIL-101-Cr, weigh 1.63kg of chromium nitrate nonahydrate and 0.7kg of terephthalic acid to dissolve in 20L of deionized water, then add 0.2kg of 40% hydrofluoric acid, and synthesize in hydrothermal React in the reactor at 180°C for 8 hours, cool to room temperature, filter, wash with N,N-dimethylformamide and ethanol three times, and dry. The product is the adsorbent carrier MIL-101-Cr:

[0047] (2) Deprotonate the coumarin molecules, weigh 0.147kg of coumarin molecules and dissolve them in 7L of methanol, weigh 0.0648kg of sodium methoxide and dissolve them in 20L of methanol, mix them, reflux at 67°C for 3h, and coumarin The deprotonation of the prime molecule is completed;

[0048] (3) Dissolve 0.196kg of the adsorbent carrier MIL-101-Cr in 3L of methanol and stir. In order to speed up the dissolution rate, heat...

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Abstract

The invention discloses a preparation method and application of a coumarin functionalized photoresponse adsorbent. The coumarin functionalized photoresponse adsorbent is prepared by grafting coumarinmolecules with photoresponse performance into an adsorbent carrier. Coumarin molecules are subjected to a dimerization reaction under irradiation of ultraviolet light with the wavelength larger than 310 nm, the surface structure of a dimer and adsorbate molecules generate a conjugation effect, and selective adsorption is conducted on the adsorbate molecules; and under the irradiation of 254nm short-wave ultraviolet light, the dimer is cracked, the conjugation effect disappears, and efficient desorption is realized. The coumarin functionalized photoresponse adsorbent can realize selective adsorption and efficient desorption of 4,6-dimethyl dibenzothiophene in fuel oil at the same time, and has good regeneration performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of light-responsive adsorbents, and in particular relates to a preparation method and application of a coumarin-functionalized light-responsive adsorbent. Background technique [0002] Due to the demand of environmental protection, the standard of deep desulfurization of fuel oil is becoming more and more stringent. At present, the traditional method of industrial desulfurization is hydrodesulfurization, which can effectively remove most of the sulfur compounds in fuel oil, such as mercaptans and sulfides, but in the removal of thiophene sulfides, especially 4,6-dimethyl Dibenzothiophene is less effective. Due to the advantages of simple process flow, low equipment investment cost and mild operating conditions, adsorption separation has great application potential in deep desulfurization of fuel oil. [0003] Metal-organic frameworks (MOFs) materials are a new class of porous adsorption mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C10G25/00
CPCB01J20/226B01J20/22C10G25/003
Inventor 朱竞钟顺戴勇
Owner YANCHENG INST OF TECH
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