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Preparation method of chitosan modified desulfurization adsorbent and application of chitosan modified desulfurization adsorbent in transformer oil treatment

A chitosan modification and adsorbent technology, applied in the direction of selective adsorption, chemical instruments and methods, ion exchange treatment devices, etc., can solve the problems of complex production and preparation methods, high production costs, poor use effects, etc., and achieves improved decolorization. Desulfurization effect, low production cost, low price effect

Active Publication Date: 2020-12-11
STATE GRID HUBEI ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its preparation method is complicated, the production cost is higher, and the use effect is poor.

Method used

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  • Preparation method of chitosan modified desulfurization adsorbent and application of chitosan modified desulfurization adsorbent in transformer oil treatment
  • Preparation method of chitosan modified desulfurization adsorbent and application of chitosan modified desulfurization adsorbent in transformer oil treatment

Examples

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Embodiment 1

[0020] A preparation method of a chitosan modified desulfurization adsorbent, comprising the steps of:

[0021] (1) Preparation of intermediate hydroxypropyltrimethylammonium chloride: Add concentrated HCl dropwise to trimethylamine at 4°C to react to generate trimethylamine hydrochloride, add epichlorohydrin at 31°C after 10 minutes, and then Stir and heat to 51°C, slowly add NaOH solution dropwise after 1h, make trimethylamine hydrochloride slowly decompose trimethylamine and react with epichlorohydrin to form glycidyltrimethylammonium chloride, continue stirring for 2h, and finally depressurize Distillation obtains hydroxypropyltrimethylammonium chloride, wherein the mass ratio of trimethylamine and epichlorohydrin added is: 1:1.5;

[0022] (2) Preparation of nano-copper-loaded adsorbent: according to the mass ratio of 1:1, respectively take molecular sieves with a pore size of 3-5nm and an XDK sorbent with a pore size of 5-15nm, and add them to a copper nitrate solution wi...

Embodiment 2

[0027] A preparation method of a chitosan modified desulfurization adsorbent, comprising the steps of:

[0028] (1) Preparation of intermediate hydroxypropyltrimethylammonium chloride: Add concentrated HCl dropwise to trimethylamine at 5°C to generate trimethylamine hydrochloride, add epichlorohydrin at 25°C after 10 minutes, and then Stir and heat to 55°C, slowly add NaOH solution dropwise after 1h, make trimethylamine hydrochloride slowly decompose trimethylamine and react with epichlorohydrin to form glycidyltrimethylammonium chloride, continue stirring for 2h, and finally depressurize Distillation obtains hydroxypropyltrimethylammonium chloride, wherein the mass ratio of trimethylamine and epichlorohydrin added is: 1:2;

[0029] (2) Preparation of nano-copper-loaded adsorbent: according to the mass ratio of 1:1, take the molecular sieve with a pore size of 3-5nm and the XDK sorbent with a pore size of 5-15nm, and add them to a copper nitrate solution with a mass fraction o...

Embodiment 3

[0034] A preparation method of a chitosan modified desulfurization adsorbent, comprising the steps of:

[0035] (1) Preparation of intermediate hydroxypropyltrimethylammonium chloride: add 100 grams of 5mol / L concentrated HCl dropwise to 100 grams of 6mol / L trimethylamine at 3°C ​​to generate trimethylamine hydrochloride, and after 10 min Add epichlorohydrin at 20°C, stir and heat to 55°C, and slowly add 0.5mol / L NaOH solution dropwise after 1 hour, so that trimethylamine hydrochloride slowly decomposes into trimethylamine and reacts with epichlorohydrin to form glycidol Trimethylammonium chloride, continue stirring for 2h, and finally obtain hydroxypropyltrimethylammonium chloride by distillation under reduced pressure, wherein the mass ratio of trimethylamine and epichlorohydrin added is: 1:3;

[0036] (2) Preparation of nano-copper-loaded adsorbent: according to the mass ratio of 1:1, take 100 grams of XDK adsorbent with a pore size of 3-5 nm and a pore size of 5-15 nm, and...

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Abstract

The invention provides a preparation method of a chitosan modified desulfurization adsorbent and application of the chitosan modified desulfurization adsorbent in transformer oil treatment. The preparation method comprises the following steps of: (1) preparing an intermediate hydroxypropyl trimethyl ammonium chloride; (2) preparing a nano copper-loaded adsorbent; (3) preparing a chitosan sodium salt; and (4) modifying the nano copper-loaded adsorbent by chitosan. The self-made chitosan modified desulfurization adsorbent is adopted for adsorption treatment of the transformer oil, the desulfurization rate is high, no pollution is caused, and the desulfurization adsorbent is suitable for deep desulfurization treatment.

Description

technical field [0001] The invention relates to the field of transformer oil desulfurization treatment, in particular to a preparation method of a chitosan-modified desulfurization adsorbent and its application in transformer oil treatment. Background technique [0002] Deteriorated waste insulating oil will become "hazardous waste" defined by the relevant national environmental protection regulations. This kind of "hazardous waste" not only causes a great waste of resources and economic losses, but also causes serious damage to human life safety and the ecological environment. harm. However, the current repair methods for degraded transformer oil at home and abroad have problems such as secondary pollution after repair, slow repair speed, cumbersome process, and low efficiency. There are single methods for repairing the performance of deteriorated insulating oil, poor impurity filtration and desulfurization effects , environmental pollution and other issues. [0003] As a...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01D15/08B01J20/30
CPCB01J20/26B01J20/18B01J20/0237B01J20/28033B01D15/08
Inventor 蔡萱任乔林李志军叶济川肖洒张驰瞿子涵易锫
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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