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Preparation method of FeOOH low-temperature desulfurizer and desulfurizer prepared through same

A technology of iron oxyhydroxide and desulfurizer, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of difficult industrial application, harsh preparation conditions, and high production costs, and achieves low production costs and high desulfurization. The effect of active, good low temperature desulfurization performance

Active Publication Date: 2015-11-18
FUZHOU UNIV ASSET MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] On the one hand, the present invention solves the problem that the iron oxyhydroxide desulfurizer in the prior art is difficult to be applied industrially due to its harsh preparation conditions and high production cost; agent pair containing a large amount of CO 2 The problem of poor desulfurization activity of industrial gases, thus providing a mild preparation condition, low production cost, suitable for high concentration CO 2 Iron oxyhydroxide low-temperature desulfurizer for atmospheric desulfurization and preparation method thereof

Method used

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  • Preparation method of FeOOH low-temperature desulfurizer and desulfurizer prepared through same
  • Preparation method of FeOOH low-temperature desulfurizer and desulfurizer prepared through same
  • Preparation method of FeOOH low-temperature desulfurizer and desulfurizer prepared through same

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Embodiment 1

[0035] The preparation method of the low-temperature iron oxyhydroxide desulfurizer described in the present embodiment comprises the following steps:

[0036] (1) 199g of FeCl 2 4H 2 O is completely dissolved in deionized water at 40°C and stirred to form a ferrous salt solution with a concentration of 1mol / L;

[0037] (2) Under constant stirring conditions, add 50 mL of 3mol / L amino trimethylene phosphonic acid to the ferrous salt solution, and stir to obtain the first mixed system;

[0038] (3) Add dropwise 500 mL of 4 mol / L NaOH aqueous solution to the first mixing system under stirring, and adjust the pH value to 7, and stir evenly to form the second mixing system;

[0039] (4) After the pH value of the second mixed system is constant, add 8 g of cetyltrimethylammonium bromide, stir evenly, and age for 3 hours to obtain the third mixed system;

[0040] (5) Centrifuge the third mixing system, collect the precipitate, wash with water, mix with pseudo-boehmite and kaolin ...

Embodiment 2

[0043] The preparation method of the low-temperature iron oxyhydroxide desulfurizer described in the present embodiment comprises the following steps:

[0044] (1) the ferrous acetate of 174g is completely dissolved in the deionized water of 50 ℃, stirs, and the formation concentration is the ferrous salt solution of 5mol / L;

[0045] (2) Under the condition of constant stirring, add 300 mL of 5 mol / L sodium phenylphosphonate to the ferrous salt solution, and stir evenly to obtain the first mixed system;

[0046] (3) Add dropwise 400 mL of 2.5 mol / L ammonium bicarbonate aqueous solution to the first mixing system under stirring, and adjust the pH value to 6.8, and stir evenly to form the second mixing system;

[0047] (4) After the pH value of the second mixed system is constant, add 10 g of octadecylamine hydrochloride, stir evenly, and age for 4.25 hours to obtain the third mixed system;

[0048] (5) Centrifuge the third mixing system, collect the precipitate, wash it with w...

Embodiment 3

[0051] The preparation method of the low-temperature iron oxyhydroxide desulfurizer described in the present embodiment comprises the following steps:

[0052] (1) 278g of FeSO 4 ·7H 2 O is completely dissolved in deionized water at 10°C and stirred to form a ferrous salt solution with a concentration of 0.05mol / L;

[0053] (2) Add 2mol / L (NH 4 ) 2 HPO 4 Aqueous solution 5mL, stir evenly to obtain the first mixed system;

[0054] (3) Add 166mL of 3mol / L ammonia water dropwise to the first mixing system under stirring, and adjust the pH value to 6, and stir evenly to form the second mixing system;

[0055] (4) After the pH value of the second mixed system is constant, add 15 g of sodium ethoxyalkyl sulfate, stir evenly, and age for 0.5 h to obtain the third mixed system;

[0056] (5) Centrifuge the third mixing system, collect the precipitate, wash with water, mix with the mixture of natural bauxite ore and kaolin in a mass ratio of 1:1, and polyacrylamide, granulate into...

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Abstract

The invention provides a preparation method of a FeOOH low-temperature desulfurizer and a desulfurized prepared through the same. The preparation method comprises the following steps: sequentially adding a water soluble ligand, a precipitating agent, and a surfactant into a ferrous salt solution under continuous stirring, performing aging and centrifugation, adding a forming agent and an adhesive, mixing, kneading, and moulding so as to obtain the desulfurizer. For the first time, the directional orientation effect, template effect and dispersing effect of the surfactant have been utilized so as to form abundant point defects and surface hydroxy groups on the surface of FeOOH, thus the specific surface area and active crystal face of the desulfurizer are enlarged, the desulfurizing activity is strengthened and the sulfur capacity is increased. The preparation conditions are middle, the production cost is low, and the preparation method is very suitable for industrial massive production. Furthermore, the provided desulfurizer has a very good low-temperature desulfurizing performance, the low-temperature sulfur capacity can reach 70% at a temperature of 0 to 120 DEG C, the desulfurization precision can reach 2 ppm, and the provided desulfurizer can be used to remove hydrogen sulfide in industrial gas with a high CO2 content and is widely used.

Description

technical field [0001] The invention relates to a desulfurizer and a preparation method thereof, in particular to a preparation method of an iron oxyhydroxide desulfurizer capable of removing hydrogen sulfide at low temperature and a desulfurizer prepared by the method, belonging to the technical field of hydrogen sulfide removal. Background technique [0002] Hydrogen sulfide (H 2 S) is a colorless and poisonous gas that widely exists in people's production and life. It is not only an important industrial raw material gas but also one of the waste gas components emitted by industrial production. h 2 The existence of S is harmful to human health, and its discharge into the atmosphere will cause acid rain and pollute the environment. At the same time, H 2 S is a strong corrosive gas, which will corrode pipelines and shorten the life of industrial equipment. In addition, trace amounts of H in raw gas 2 S can also cause catalyst poisoning and affect the process of productio...

Claims

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Application Information

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IPC IPC(8): B01D53/52B01D53/81
Inventor 曹彦宁杜忠杰江莉龙
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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