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Preparation method, product and application of magnetic spinel type adsorbent

A spinel-type, adsorbent technology, applied in separation methods, chemical instruments and methods, and other chemical processes, etc., can solve the problems of adverse effects of environmental protection facilities, high adsorbent prices, and inability to recycle and treat, and achieve the goal of helping The effect of crystal form and crystal size growth control, easy reaction process, and efficient recovery

Pending Publication Date: 2022-07-08
GUODIAN SCI & TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Activated carbon injection technology is considered to be the most mature and reliable mercury removal technology. There have been industrial experiments, demonstrations, and even commercial application performance. It can transfer gas phase pollutants into ash or desulfurization wastewater, but cannot be recycled and treated, and has adverse effects on downstream environmental protection facilities such as desulfurization and dust removal, so it has not been widely and effectively promoted, and many foreign facilities are also in a semi-outage state

Method used

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  • Preparation method, product and application of magnetic spinel type adsorbent
  • Preparation method, product and application of magnetic spinel type adsorbent
  • Preparation method, product and application of magnetic spinel type adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: a preparation method of a spinel-type adsorbent for adsorbing gaseous zero-valent mercury, comprising the following steps:

[0032] (a) adding deionized water in the beaker, dissolving manganese acetate, cobalt acetate and ferric nitrate in it according to the stoichiometric ratio Mn:Co:Fe=0.5:0.5:2 to obtain solution A;

[0033] (b) in solution A, add anhydrous citric acid, the stoichiometric ratio of anhydrous citric acid addition and the amount of Fe substance in solution A is 1:0.6, stir to obtain solution B;

[0034] (c) Put the solution B into a constant temperature magnetic stirring water bath, under the conditions of a temperature of 70°C, a time of 4h, and a stirring speed of 250r / min, stir and heat until the solution evaporates to dryness and becomes a wet gel, and then the wet The gel is placed in an oven, dried and ground into powder at a temperature of 100°C and a time of 12h to obtain precursor C;

[0035] (d) put the precursor C into the mu...

Embodiment 2

[0037] Embodiment 2: a preparation method of a spinel-type adsorbent for adsorbing gaseous zero-valent mercury, comprising the following steps:

[0038] (a) adding deionized water in the beaker, dissolving manganese acetate, cobalt acetate and ferric nitrate in it according to the stoichiometric ratio Mn:Co:Fe=0.5:0.5:2 to obtain solution A;

[0039] (b) in solution A, add anhydrous citric acid, the stoichiometric ratio of anhydrous citric acid addition and the amount of Fe substance in solution A is 1:1.2, stir to obtain solution B;

[0040] (c) Put the solution B in a constant temperature magnetic stirring water bath, under the conditions of a temperature of 80 °C, a time of 2.5 h, and a stirring speed of 350 r / min, stirring and heating until the solution evaporates to dryness and becomes a wet gel, and then the The wet gel was placed in an oven, dried and ground into powder at a temperature of 120°C and a time of 8h to obtain the precursor C;

[0041] (d) put the precursor...

Embodiment 3

[0043] Embodiment 3: a preparation method of a spinel-type adsorbent for adsorbing gaseous zero-valent mercury, comprising the following steps:

[0044](a) adding deionized water in the beaker, dissolving manganese acetate, cobalt acetate and ferric nitrate in it according to the stoichiometric ratio Mn:Co:Fe=0.5:0.5:2 to obtain solution A;

[0045] (b) in solution A, add anhydrous citric acid, the stoichiometric ratio of anhydrous citric acid addition and the amount of Fe substance in solution A is 1:1.8, stir to obtain solution B;

[0046] (c) Put the solution B in a constant temperature magnetic stirring water bath, under the conditions of a temperature of 75°C, a time of 3h, and a stirring speed of 300r / min, stir and heat until the solution evaporates to dryness and becomes a wet gel, and then the wet The gel is placed in an oven, dried and ground into powder at a temperature of 110°C and a time of 10h to obtain the precursor C;

[0047] (d) put the precursor C into the m...

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Abstract

The invention relates to a preparation method of a magnetic spinel type adsorbent, a product and application, and belongs to the technical field of mercury adsorption.The preparation method comprises the steps that deionized water is added into a container, manganese acetate, cobalt acetate and ferric nitrate are dissolved in the deionized water, and a solution A is obtained; adding anhydrous citric acid into the solution A, and uniformly stirring to obtain a solution B; stirring the solution B in a container, heating until the solution B is evaporated to dryness to obtain wet gel, drying the wet gel, and grinding the wet gel into powder to obtain a precursor C; putting the precursor C into a muffle furnace to induce spontaneous combustion to obtain an initial sample D; putting the initial sample D into a muffle furnace, and roasting to obtain the spinel type manganese-cobalt-iron demercuration adsorbent, and the spinel type manganese-cobalt-iron demercuration adsorbent has the characteristics that the prepared product is low in impurity, high in purity, good in economical efficiency, high in gaseous zero-valent mercury adsorption capacity and high in magnetic field response capacity.

Description

technical field [0001] The invention relates to a preparation method, product and application of a magnetic spinel-type adsorbent, and belongs to the technical field of mercury adsorption. Background technique [0002] Fossil fuel combustion causes 60% of mercury releases from anthropogenic sources. Due to the biotoxicity and bioaccumulation of mercury, the emission and control of mercury in coal-fired flue gas has received great attention in recent years. Studies have shown that my country's control of mercury from coal combustion and its control has been at a relatively weak level. A large number of mercury-containing substances enter the atmosphere or water body through various ways, causing serious environmental pollution problems. Mercury is difficult to degrade, which leads to their long-term existence in the natural environment and threatens human health through food chain enrichment. Therefore, the control of mercury pollution should arouse people's attention. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30B01D53/02
CPCB01J20/06B01J20/28009B01D53/02B01J2220/4806B01J2220/4812B01D2253/1124B01D2257/602
Inventor 许月阳仲兆平薛建明朱法华黄佳伟徐元强
Owner GUODIAN SCI & TECH RES INST
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