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Metal-organic framework material as well as preparation method and application thereof

An organic framework and metal technology, which is applied in the field of metal-organic-framework materials and their preparation, can solve the problems of low processing efficiency, easy rebound of oil performance, and heavy labor, and achieve the effect of reducing consumption and dielectric loss

Active Publication Date: 2019-02-12
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing methods to reduce the dielectric loss of transformer oil mainly include: (1) oil change; (2) activated clay adsorption method. However, the oil change requires huge funds and the oil change process is extremely complicated. High problem, but not economical nor environmentally friendly
The activated clay method requires a large amount of sulfuric acid acidification and a container containing sulfuric acid. The discharged waste residue is not easy to handle, and the labor load in the processing process is large, the processing efficiency is low, and the performance of the oil is easy to rebound.

Method used

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  • Metal-organic framework material as well as preparation method and application thereof
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  • Metal-organic framework material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Preparation of metal-organic framework materials: first, 0.94g terephthalic acid (C 8 h 6 o 4 ) with 3.72g ZrCl 4 (The molar ratio of organic ligands to inorganic salts is 0.35:1) Transfer to a polytetrafluoroethylene liner, then add dimethylformamide, ethanol and water in a ratio of 21mL: 21mL: 14mL, then stir and mix for 5 minutes , moved to a stainless steel reaction kettle after being covered, and sealed the reaction kettle, then placed in an electric blast constant temperature drying oven, reacted at a temperature of 60°C for 23 hours, and then centrifuged at a speed of 5000rpm for 4min to obtain The product was then washed with 50 mL of acetone and activated for 72 hours at room temperature, during which the activation solution was replaced 6 times, and then the washed product was obtained by centrifugation, and vacuum-dried at 150°C for 7 hours to obtain powdered metal -Organic framework materials.

[0043] 2. Molding of metal-organic framework materials: ...

Embodiment 2

[0046] One, prepare metal-organic framework material: first 0.84g tribenzenetricarboxylic acid (C 9 h 6 o 6 ) and 2.42g Cu(NO 3 ) 2 ·3H 2 O (the molar ratio of organic ligand to inorganic salt is 0.40:1) was transferred to the polytetrafluoroethylene liner, and then dimethylformamide, ethanol and water were added in the ratio of 24mL: 24mL: 16mL, and then stirred and mixed for 5 Minutes, capped and moved to a stainless steel reaction kettle, and the reaction kettle was sealed, then placed in an electric blast constant temperature drying oven, reacted at a temperature of 65°C for 24 hours, and then centrifuged at a speed of 6000rpm for 5min. The product was obtained, and then washed with 50 mL of acetone and activated for 72 hours at room temperature, during which the activation solution was replaced 6 times, and then the washed product was obtained by centrifugation, and vacuum-dried at 150 ° C for 8 hours to obtain a powder Metal-organic framework materials.

[0047] 2....

Embodiment 3

[0050] 1. Preparation of metal-organic framework materials: first, 0.68g terephthalic acid (C 8 h 6 o 4 ) and 3.2gCr(NO 3 ) 2 9H 2 O (the molar ratio of organic ligand to inorganic salt is 0.50:1) was transferred to the polytetrafluoroethylene liner, and then dimethylformamide, ethanol and water were added in the ratio of 21mL: 21mL: 14mL, and then stirred and mixed for 5 Minutes, covered and moved to a stainless steel reaction kettle, and sealed the reaction kettle, then placed in an electric blast constant temperature drying oven, reacted at a temperature of 70 ° C for 24 hours, and then centrifuged at a speed of 7000 rpm for 7 minutes. The product was obtained, and then washed with 50 mL of acetone and activated for 72 hours at room temperature, during which the activation solution was replaced 6 times, and then the washed product was obtained by centrifugation, and vacuum-dried at 150 ° C for 9 hours to obtain a powder Metal-organic framework materials.

[0051] 2. M...

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Abstract

The invention relates to the technical field of transformer oil and in particular relates to a metal-organic framework material as well as a preparation method and application thereof. The invention provides the preparation method of the metal-organic framework material; the preparation method comprises the following steps: mixing an organic ligand, inorganic salt, ethanol water and dimethylformamide or diethylamide and reacting to obtain a powdery metal-organic framework; then granulating and molding to obtain a granular metal-organic framework. According to the method provided by the invention, the metal-organic framework material is obtained through granulation and molding, so that the metal-organic framework material has a stable shape and has large specific surface area, pore capacityand pore diameter. Compared with other adsorbents with the same use amount, the metal-organic framework material provided by the invention has a high adsorption amount on degraded transformer oil andhas high-efficiency and excellent adsorption performance, so that the dielectric loss reduction rate of the degraded transformer oil can reach 98 percent or more and the volume resistivity rising rate can reach 1919.42 percent at maximum; both the interface tension of the transformer oil and the color of an oil sample are improved.

Description

technical field [0001] The invention relates to the technical field of transformer oil treatment, in particular to a metal-organic-skeleton material and its preparation method and application. Background technique [0002] Transformers are one of the core equipment in power transmission, and transformer oil is one of the most important insulating materials in transformers. In recent years, my country's power industry has developed rapidly, and the demand for transformer oil has also increased. The market demand for transformer oil will increase from 400,000 tons per year to 1.6 million tons, with an average annual increase of more than 25%. The market prospect of transformer oil is very bright. At the same time, as a key parameter to detect the quality of transformer oil, the dielectric loss factor can intuitively and quickly judge the integrity of the oil, and can reflect the degree of dirt and deterioration of the oil during operation, and the degree of dielectric loss of t...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C08G83/00H01F27/14
CPCB01J20/226C08G83/008H01F27/14
Inventor 赵耀洪钱艺华李丽范圣平
Owner GUANGDONG POWER GRID CO LTD
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