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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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But its preparation method is complicated, the pro

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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

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[0019]Example 1

[0020]A preparation method of chitosan-modified desulfurization adsorbent includes the following steps:

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

[0022](2) Preparation of nano-copper adsorbent: according to the mass ratio of 1:1, take 3-5nm molecular sieve and 5-15nm XDK adsorbent, add them to 8% copper nitrate solution and soak After stirring and reacting for a period of time at room temp...

Example Embodiment

[0026]Example 2

[0027]A preparation method of chitosan-modified desulfurization adsorbent includes the following steps:

[0028](1) Preparation of intermediate hydroxypropyltrimethylammonium chloride: drop concentrated HCl into trimethylamine at 5°C to react to form 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 to make trimethylamine hydrochloride slowly decompose trimethylamine and react with epichlorohydrin to form glycidyltrimethylammonium chloride, continue stirring for 2h, and finally reduce pressure Distillation to obtain hydroxypropyltrimethylammonium chloride, wherein the mass ratio of trimethylamine and epichlorohydrin added is 1:2;

[0029](2) Preparation of nano-copper adsorbent: according to the mass ratio of 1:1, take the molecular sieve with pore size of 3-5nm and XDK adsorbent with pore size of 5-15nm, and add them to 14% copper nitrate solution to soak After stirring and...

Example Embodiment

[0033]Example 3

[0034]A preparation method of a chitosan modified desulfurization adsorbent includes the following steps:

[0035](1) Preparation of intermediate hydroxypropyltrimethylammonium chloride: 100g of 5mol / L concentrated HCl was added dropwise to 100g of 6mol / L trimethylamine at 3℃ to react to generate trimethylamine hydrochloride, 10 min later Add epichlorohydrin at 20°C, then stir and heat to 55°C, slowly add 0.5mol / L NaOH solution dropwise after 1h to make trimethylamine hydrochloride slowly decompose trimethylamine and react with epichlorohydrin to form glycidol Trimethylammonium chloride, continue to stir for 2h, and finally distill under reduced pressure to obtain hydroxypropyltrimethylammonium chloride. The mass ratio of trimethylamine to epichlorohydrin added is 1:3;

[0036](2) Preparation of nano-copper adsorbent: Take 100 grams each of molecular sieve with pore size of 3-5nm and XDK adsorbent with pore size of 5-15nm according to the mass ratio of 1:1, and add 200mL of...

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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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