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Adsorbent for normal-temperature removing of dibenzyl disulfide in transformer oil and method

A technology of dibenzyl disulfide and transformer oil, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problem of agglomeration of active sites on the surface of adsorbents, lack of homogeneous mixing steps, complex preparation process, etc. problems, to achieve the effect of improving adsorption selectivity, reducing energy consumption, and simplifying the preparation process

Active Publication Date: 2019-12-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in this patent, the raw material of the adsorbent lacks a homogeneous mixing step, which can easily cause the agglomeration of the active sites on the surface of the adsorbent during the preparation process; the preparation process of the adsorbent involves multiple high-temperature roasting, which not only makes the preparation process more complicated , will also consume a lot of energy, obviously not universal for field application

Method used

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  • Adsorbent for normal-temperature removing of dibenzyl disulfide in transformer oil and method
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  • Adsorbent for normal-temperature removing of dibenzyl disulfide in transformer oil and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Dissolve 1 g of silver nitrate in 10 g of deionized water, add 10 g of kaolin with a mesh number of 80 mesh, and ultrasonically disperse the kaolin for 20 minutes;

[0041] (2) Put the raw materials in a planetary mixer, first perform synchronous high-speed rotation and revolution stirring under normal pressure, the rotation speed is 1000rpm, the revolution speed is 800rpm, the stirring time is 1h, and then the internal pressure of the stirring chamber is set to 100Pa, low-speed synchronous rotation and revolution stirring, wherein the rotation speed is 100rpm, the revolution speed is 60rpm, and the stirring time is 20min.

[0042] (3) The prepared slurry was dried at a temperature of 150° C. for 12 hours, and a block sample was obtained after drying.

[0043] (4) Grinding the bulk sample, passing through a 120-mesh sieve after grinding, and finally preparing an adsorbent with uniform particles.

Embodiment 2

[0045] (1) Dissolve 1 g of silver nitrate in 15 g of deionized water, add 20 g of pseudo-boehmite with a mesh number of 90, and ultrasonically disperse the pseudo-boehmite for 20 minutes;

[0046](2) Put the raw materials in a planetary mixer, first carry out synchronous high-speed rotation and revolution stirring under normal pressure conditions, the rotation speed is 1100rpm, the revolution speed is 900rpm, the stirring time is 1.2h, and then the internal pressure of the mixing chamber is set 150Pa, low-speed synchronous rotation and revolution stirring, wherein the rotation speed is 150rpm, the revolution speed is 80rpm, and the stirring time is 30min.

[0047] (3) The prepared slurry was dried at a temperature of 120° C. for 14 hours, and a block sample was obtained after drying.

[0048] (4) Grinding the bulk sample, passing through a 140-mesh sieve after grinding, and finally preparing an adsorbent with uniform particles.

Embodiment 3

[0050] (1) Dissolve 1 g of silver nitrate in 20 g of deionized water, add 30 g of sepiolite with a mesh number of 90, and ultrasonically disperse the sepiolite for 30 minutes;

[0051] (2) Put the raw materials in a planetary mixer, first carry out synchronous high-speed rotation and revolution stirring under normal pressure conditions, the rotation speed is 1200rpm, the revolution speed is 1000rpm, the stirring time is 1.5h, and then the internal pressure of the mixing chamber is set 200Pa, low-speed synchronous rotation and revolution stirring, wherein the rotation speed is 200rpm, the revolution speed is 100rpm, and the stirring time is 40min.

[0052] (3) The prepared slurry was dried at a temperature of 180° C. for 16 hours, and a block sample was obtained after drying.

[0053] (4) Grinding the bulk sample, passing through a 160-mesh sieve after grinding, and finally preparing an adsorbent with uniform particles.

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Abstract

The invention discloses an adsorbent for normal-temperature removing of dibenzyl disulfide in transformer oil and a method. The method comprises the steps that first, silver nitrate is dissolved intodeionized water, a porous carrier is added, and ultrasound treatment is conducted till carrier particles are evenly dispersed; second, raw materials prepared in the first step are placed into a planetary stirrer to be stirred, so that the raw materials are mixed evenly; third, slurry obtained in the second step is dried; and fourth, a dried sample is ground and then sieved through a sieve, and thus the adsorbent with uniform particles is obtained. The adsorption capacity of the prepared adsorbent to the dibenzyl disulfide at the normal temperature is higher than 50 mg / g, the removal rate is higher than 95%, and the performance of the adsorbent is much higher than that of traditional adsorption materials such as activated carbon and activated clay. The adsorbent is simple in preparation process, has the high efficiency of removing dibenzyl disulfide in the transformer oil and has potential application prospects in the field of transformer oil purification.

Description

technical field [0001] The invention relates to the technical field of transformer oil impurity removal, in particular to an adsorbent (adsorbent loaded with silver ions) for removing dibenzyl disulfide in transformer oil at normal temperature and a method thereof. Background technique [0002] Dibenzyl disulfide (DBDS), as an antioxidant, was widely added to transformer oil in the early 21st century to play a good role in oxidation resistance. However, in the past ten years, studies have found that DBDS is a corrosive sulfide, and most of the defects of transformer insulation resistance drop caused by corrosive sulfur at home and abroad are related to it. The proportion of accidents caused by DBDS is as high as 90%. [0003] The reason why DBDS has a negative impact on the transformer is that it will react with copper parts in the equipment to generate a large amount of conductive cuprous sulfide, which will gradually dissolve in the transformer oil, thereby changing the ma...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/08B01J20/30C10G25/00
CPCB01J20/12B01J20/08B01J20/0233B01J20/0296C10G25/003
Inventor 夏启斌吴坚钱艺华赵耀洪
Owner SOUTH CHINA UNIV OF TECH
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