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Preparation method of adsorbent for removing dibenzyl disulfide in insulation oil

A technology of dibenzyl disulfide and adsorbent, applied in chemical instruments and methods, other chemical processes, lubricating compositions, etc., can solve the problem of inaccurate removal effect of adsorbent on corrosive sulfur, no dibenzyl disulfide Ether removal research and other issues

Inactive Publication Date: 2018-01-30
STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] None of these documents and patents have studied the removal of dibenzyl disulfide, the most important sulfur corrosive substance in insulating oil, and the removal effect of adsorbents on corrosive sulfur is not exact.

Method used

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  • Preparation method of adsorbent for removing dibenzyl disulfide in insulation oil
  • Preparation method of adsorbent for removing dibenzyl disulfide in insulation oil

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specific Embodiment approach 1

[0016] Embodiment 1: In this embodiment, a method for preparing an adsorbent for removing dibenzyl disulfide in insulating oil is specifically carried out in the following steps:

[0017] 1. Mix the same mass of NaY molecular sieve and demineralized water, keep it for 2-2.5 hours, drain, add lanthanum nitrate solution, stir evenly, soak for 36-40 hours, drain the molecular sieve, dry, and control the temperature at 450-455°C in a nitrogen atmosphere °C, roast the molecular sieve for 2-2.5 hours, then control the temperature at 550-555 °C for 2-2.5 hours, cool to room temperature, and prepare the lanthanum-modified molecular sieve; the Si / Al molar ratio of the molecular sieve is 3.2-3.5, spherical, The particle size is 1.0~1.5mm;

[0018] 2. Mix the lanthanum-modified molecular sieve obtained in step 1 with equal mass and demineralized water, keep it for 2-2.5 hours, drain, add cupric ammonium chloride solution, stir evenly, soak for 48-50 hours, drain the molecular sieve, dry ...

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the lanthanum nitrate solution adopts analytically pure La in the step one 3 (NO 3 ) 3 ·6H 2 O preparation, the concentration is 0.12mol / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the effective pores of the NaY molecular sieve are 4 nm to 6 nm. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of an adsorbent for removing dibenzyl disulfide in insulation oil, and relates to the field of the preparation method of the adsorbent. The method aims at solving the technical problems that in the prior art, due to the corrosion of corrosive sulfur (the dibenzyl disulfide is the major corrosive sulfur) in the insulation oil on transformer winding copperwires, transformer faults frequently occur, and serious harm is caused on the power grid safety. The method comprises the following steps of 1, preparing a lanthanum modified molecular sieve; 2, preparing a copper carrying lanthanum modified molecular sieve; 3, compounding the copper carrying lanthanum modified molecular sieve by a nickel nitrate solution, and performing drying and roasting. Theadsorbent has a strong selectivity absorption effect on the dibenzyl disulfide in the insulation oil; the removal rate is high; the quality of the insulation oil is effectively improved. The preparedadsorbent is used for removing the corrosive sulfide in the product oil.

Description

technical field [0001] The present invention relates to the field of adsorbent preparation methods. Background technique [0002] In recent years, transformer failures caused by corrosive sulfur in insulating oil have occurred frequently at home and abroad, which has brought great harm to the safety of the power grid and caused great economic losses and social impacts. Through the sulfur corrosion test of 540 transformers with a voltage level of 220kV and above, it was found that the insulating oil with strong sulfur corrosion contained dibenzyl disulfide (DBDS), and the content was in the range of 35mg / kg to 115mg / kg. Insulating oils that do not contain dibenzyl disulfide are not sulfur corrosive, so dibenzyl disulfide is the most important copper corrosive substance. During the operation of the transformer, the dibenzyl disulfide in the insulating oil will react with the copper wire of the transformer, corrode the metal copper, produce and precipitate cuprous sulfide on i...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30C10M177/00
Inventor 李国兴姜子秋关艳玲王悦
Owner STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST
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