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Improved copper ethylene absorbent and preparation method thereof

A technology of copper ethylene and absorbent, which is applied in the field of modified copper ethylene absorbent and its preparation, which can solve the problems that the absorbent cannot be recycled and reused, food safety problems, environmental pollution, etc., and the recovery method is simple and easy, and the distribution is uniform , good fresh-keeping effect

Inactive Publication Date: 2009-08-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of absorbent has been used for a long time and has a good effect, due to the toxicity of potassium permanganate, it is easy to leak during use, which will cause serious food safety problems.
In addition, this type of absorbent cannot be recycled and reused, and the manganese element in it will also cause environmental pollution
[0007] At present, the technology of loading metals on porous supports is generally used as a catalyst for the polymerization of olefins, but the application of this technology to the preparation of fruit, vegetable and flower preservatives has not been reported at home and abroad.

Method used

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  • Improved copper ethylene absorbent and preparation method thereof
  • Improved copper ethylene absorbent and preparation method thereof
  • Improved copper ethylene absorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Using equal volume impregnation method, 0.1336gCuCl 2 2H 2 O was dissolved in 7.5ml deionized water to prepare an impregnating solution, and then 5 g of activated activated carbon was immersed in the impregnating solution for 6 hours to obtain a sample;

[0040](2) The sample obtained in step (1) was dried in an oven at 100°C for 4 hours, then transferred to a muffle furnace and roasted at 400°C for 1 hour in a nitrogen atmosphere, and then placed in a 400°C, hydrogen flow rate of 40ml / min Reducing in a reducing tube for 2 hours, the modified copper ethylene absorbent is obtained, wherein the weight percentage of Cu is 1%, and the weight percentage of activated carbon is 99%.

[0041] The absorption penetration ability of this absorbent to ethylene is shown in figure 1 , the test method is: at room temperature and normal pressure, air with an ethylene concentration of 300ppm is passed into the same amount of modified copper ethylene absorbent, untreated activated ...

Embodiment 2

[0044] (1) Using equal volume impregnation method, 0.2671gCuCl 2 2H 2 O was dissolved in 7.5ml deionized water to prepare an impregnating liquid, and then 5 g of activated activated carbon was immersed in the impregnating liquid for 5 hours to obtain a sample;

[0045] (2) The sample obtained in step (1) was dried in an oven at 100°C for 4 hours, then transferred to a muffle furnace and roasted at 400°C for 1 hour in a nitrogen atmosphere, and then placed in a 400°C, hydrogen flow rate of 40ml / min Reducing in a reducing tube for 2 hours, the modified copper ethylene absorbent is obtained, wherein the weight percentage of Cu is 2%, and the weight percentage of activated carbon is 98%.

[0046] The absorption penetration ability of this absorbent to ethylene is shown in figure 2 , test method with embodiment 1.

Embodiment 3

[0048] (1) Using equal volume impregnation method, 0.4008gCuCl 2 2H 2 O was dissolved in 7.5ml deionized water to prepare an impregnating liquid, and then 5 g of activated activated carbon was immersed in the impregnating liquid for 5 hours to obtain a sample;

[0049] (2) The sample obtained in step (1) was dried in an oven at 100°C for 4 hours, then transferred to a muffle furnace and roasted at 400°C for 1 hour in a nitrogen atmosphere, and then placed in a 400°C, hydrogen flow rate of 40ml / min Reducing in a reducing tube for 2 hours, the modified copper ethylene absorbent is obtained, wherein the weight percentage of Cu is 3%, and the weight percentage of activated carbon is 97%.

[0050] The absorption penetration ability of this absorbent to ethylene is shown in image 3 , test method with embodiment 1.

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Abstract

The invention discloses an improved copper ethylene absorbent, prepared by supporting the metal copper on the carrier, comprising, based on the weight percentage, 0.1-6% of copper and 94-99.9% of the carrier, wherein the carrier is one of active carbon, zeolite, diatomite, molecular sieve and alumina. The improved copper ethylene absorbent has good fresh-keeping effect, long usage period, no poison and little effect by the temperature and humidity, can rapidly absorb the organic gas such as ethylene, methane and the like and has big adsorption quantity, and can be recycled and reused with simple recovery method. The invention also discloses a preparation method of the improved copper ethylene absorbent, having simple operation and being suitable for the industrial production.

Description

technical field [0001] The invention relates to a fresh-keeping technology for fruits, vegetables and flowers, in particular to a modified copper-ethylene absorbent for keeping fruits, vegetables and flowers fresh and a preparation method thereof. Background technique [0002] Due to the influence of physical, physiological and pathological factors, the yield and quality of fruits, vegetables and flowers are seriously lost after harvesting. According to the statistics of FAO, due to the relatively perfect fresh-keeping technology of fruits and vegetables in developed countries in the world, the loss rate of their products is only 5%, while that in developing countries is 20% to 30%. In my country, the loss rate of fruits and vegetables after harvest is about 20%. Flower preservation is also a very important task in the production, storage, transportation and circulation of commodity flowers. [0003] Ethylene is a gas with very small molecules, which can usually be produced...

Claims

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Application Information

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IPC IPC(8): B01J20/02B01J20/32B01D53/02B01D53/72A23B7/14
Inventor 刘东红李俊叶兴乾陈健初吴丹
Owner ZHEJIANG UNIV
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