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Preparation and application of high-stability cuprous modified mesoporous oxide material

A high stability, oxide technology, applied in the direction of alkali metal oxides/hydroxides, silicon compounds, alkali metal compounds, etc., can solve the problems affecting preparation, storage and application, loss of π complexation force, and active sites Instability and other problems, to achieve the effect of simple method, improved moisture resistance and high selectivity

Pending Publication Date: 2019-10-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cu(I) modified mesoporous oxide materials have a fatal flaw, that is, Cu(I) has poor stability, which limits its practical application.
Even in a normal environment, the Cu(I) active sites in Cu(I)-modified mesoporous oxide materials are extremely unstable, which seriously affects the preparation and storage of Cu(I)-modified mesoporous oxide materials. And application This is because Cu(I) is easily oxidized to Cu(II) under the combined action of water vapor and air, losing π complexation force and loss of adsorption activity

Method used

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  • Preparation and application of high-stability cuprous modified mesoporous oxide material
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  • Preparation and application of high-stability cuprous modified mesoporous oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 0.05gCu 2 Spread O@SBA-15 powder in a glass bottle, put 0.5g of polydimethylsiloxane around it to ensure that the two do not touch, seal it and vacuumize it, put it in 235°C for 60 minutes, and let it cool down to room temperature naturally. A highly stable monovalent copper-modified mesoporous oxide adsorbent is obtained, and its polydimethylsiloxane deposition amount is 16.4 wt%. After testing, its contact angle is 158° and has superhydrophobicity.

[0028] In the experiment, guarantee Cu 2 O@SBA-15 powder is not in contact with polydimethylsiloxane, and under high temperature and vacuum conditions, polydimethylsiloxane is vapor-phase deposited on the surface of mesoporous oxide, or the hydrophobic coating is directly deposited on the mesoporous oxide The surface polymerizes and then wraps the mesoporous oxide to form a uniform hydrophobic coating; if the two come into contact, the polydimethylsiloxane does not become vapor-phase deposited on the mesoporous oxi...

Embodiment 2

[0034] According to Table 2, the monovalent copper-modified mesoporous oxide was dispersed in a solvent to make a suspension, and then the hydrophobic coating was also dispersed in the solvent. After the two are mixed, they are spray-dried in an inert gas, and the collected samples are washed with a solvent and dried in vacuum at 120°C to obtain a highly stable monovalent copper-modified mesoporous oxide material adsorbent.

[0035] Table 2

[0036]

[0037]

[0038] The mass concentration ratio of the monovalent copper-modified mesoporous oxide to the hydrophobic coating determines the mass content of the hydrophobic coating coated on the surface of the material. When the mass concentration ratio is too large, the adsorbent is still hydrophilic. If the mass concentration ratio of the material is too small, an excessive amount of hydrophobic coating will be introduced to block the pores, which will seriously affect the adsorption performance. As can be seen from the exp...

Embodiment 3

[0040] According to Table 3, weigh monovalent copper-modified mesoporous oxide, monomer and initiator, add solvent, seal and react at a certain temperature, and naturally cool to room temperature to prepare highly stable monovalent copper-modified mesoporous oxide Adsorbent.

[0041] table 3

[0042]

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Abstract

The invention discloses preparation and application of high-stability cuprous modified mesoporous oxide material. The high-stability cuprous modified mesoporous oxide material is involved and comprises a hydrophobic coating and a cuprous modified mesoporous oxide; the mass ratio of the hydrophobic coating to the cuprous modified mesoporous oxide is (0.02-0.5):1. The preparation method of the high-stability cuprous modified mesoporous oxide material is further involved. The method comprises the step that the surface of the cuprous modified mesoporous oxide is coated with the hydrophobic coating. The stability and humidity resistance of the high-stability cuprous modified mesoporous oxide material are high, and the high-stability cuprous modified mesoporous oxide material can be applied to desulfuration of fuel oil, separation of olefin and alkane and recycling of carbon monoxide.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to the preparation and application of a highly stable monovalent copper modified mesoporous oxide material. Background technique [0002] Mercaptans, sulfides, sulfur oxides and thiophene sulfides contained in fuel oil (gasoline, diesel and kerosene, etc.) are one of the main factors leading to environmental pollution. These sulfides will generate toxic sulfur oxides with the combustion of fuel oil, pollute the air, and can further generate acid rain, corrode buildings, and cause great harm. Countries around the world have higher and higher requirements for fuel oil quality, so fuel Deep desulfurization of oil has become an important and urgent problem to be solved. The separation of olefins and alkanes has always been a key project in the chemical industry, among which C 2 h 4 / C 2 h 6 and C 3 h 6 / C 3 h 8 The separation is most representative. Ole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30C10G25/00
CPCB01J20/0237B01J20/103B01J20/28083C10G25/003C10G2300/202
Inventor 孙林兵李玉霞刘晓勤
Owner NANJING UNIV OF TECH
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