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Method for recovering sulphur on iron oxyhydroxide and application of sulphur removed iron oxyhydroxide

An iron oxyhydroxide, iron oxide technology, applied in the directions of iron oxide/iron hydroxide, chemical instruments and methods, separation methods, etc., can solve problems such as the decrease of the desulfurization ability of iron oxyhydroxide, avoid loss, avoid dispersion, and ensure desulfurization The effect of nature

Active Publication Date: 2018-09-04
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Therefore, the technical problem to be solved in the present invention is to overcome the defect that the desulfurization ability of iron oxyhydroxide decreases in the existing method for reclaiming sulfur on iron oxyhydroxide, and then provide a method for reclaiming sulfur from sulfur-containing iron oxyhydroxide

Method used

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  • Method for recovering sulphur on iron oxyhydroxide and application of sulphur removed iron oxyhydroxide
  • Method for recovering sulphur on iron oxyhydroxide and application of sulphur removed iron oxyhydroxide
  • Method for recovering sulphur on iron oxyhydroxide and application of sulphur removed iron oxyhydroxide

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Embodiment 1

[0036] The present embodiment provides a kind of method that reclaims sulfur on iron oxyhydroxide, comprises the steps:

[0037] (1) Drying sulfur-containing iron oxyhydroxide at 55°C under normal pressure until its water content is 5wt%;

[0038] (2) Stir and mix the dried sulfur-containing iron oxyhydroxide and 1,3,5-trimethylbenzene at a mass ratio of 1:10 at 90°C for 2 hours, and separate the solid and liquid to obtain a sulfur-containing solvent and a sulfur-removed Iron oxyhydroxide;

[0039] (3) Drying the iron oxyhydroxide to remove sulfur at 65° C. to obtain iron oxyhydroxide A; cooling and crystallizing the sulfur-containing solvent at a temperature of 5° C., and separating solid and liquid to obtain sulfur A.

Embodiment 2

[0041] The present embodiment provides a kind of method that reclaims sulfur on iron oxyhydroxide, comprises the steps:

[0042] (1) Centrifuge the sulfur-containing ferric oxyhydroxide first, and initially dewater it, then dry the sulfur-containing ferric oxyhydroxide at a temperature of 45°C and a pressure of 20Kpa until its water content is 0.1wt%;

[0043] (2) Stirring and mixing the dried sulfur-containing iron oxyhydroxide and methylcyclohexane at 80° C. for 1 hour according to a mass ratio of 1:30, and separating the solid and liquid to obtain the first sulfur-containing solvent and the first iron oxyhydroxide;

[0044] (3) stirring and mixing the first iron oxyhydroxide and methylcyclohexane at 80° C. for 1 hour according to the mass ratio of 1:30, and separating the solid and liquid to obtain the second sulfur-containing solvent and the second iron oxyhydroxide;

[0045] (4) Stir and mix the second iron oxyhydroxide and methylcyclohexane at 80° C. for 1 hour according...

Embodiment 3

[0048] The present embodiment provides a kind of method that reclaims sulfur on iron oxyhydroxide, comprises the steps:

[0049] (1) Centrifuge the sulfur-containing ferric oxyhydroxide first, and initially dewater it, then dry the sulfur-containing ferric oxyhydroxide at a temperature of 85°C and a pressure of 80Kpa until its water content is 4wt%;

[0050] (2) stirring and mixing the dried sulfur-containing iron oxyhydroxide and trichloroethane at a mass ratio of 1:7 at 50° C. for 3 hours, and separating the solid and liquid to obtain the first sulfur-containing solvent and the first iron oxyhydroxide;

[0051](3) stirring and mixing the first iron oxyhydroxide and trichloroethane according to a mass ratio of 1:7 at 50° C. for 3 hours, and separating the solid and liquid to obtain the second sulfur-containing solvent and the second iron oxyhydroxide;

[0052] (4) Stir and mix the second iron oxyhydroxide and trichloroethane according to the mass ratio of 1:7 at 50° C. for 3 ...

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Abstract

The invention provides a method for recovering sulphur on iron oxyhydroxide and the application of the sulphur removed iron oxyhydroxide. On one side, the vacuum degree and the temperature for dryingthe sulphur-containing iron oxyhydroxide and the sulphur removed iron oxyhydroxide are strictly controlled to avoid the loss of the hydroxyl in the iron oxyhydroxide and guarantee the desulfurizationcapability of the iron oxyhydroxide; on the other side, the water content of the sulphur-containing iron oxyhydroxide is strictly controlled to effectively guarantee the desulfurization capability ofthe iron oxyhydroxide and the purity of the recovered sulphur on the premise of efficiently separating the sulphur from iron oxyhydroxide; the reason is that the water content of the iron oxyhydroxideis too high, the iron oxyhydroxide is dispersed into tiny particles in an organic solvent, then the desulfurization capability of the iron oxyhydroxide is reduced, and the recovered sulphur also contains a large quantity of iron elements.

Description

technical field [0001] The invention relates to the technical field of iron oxyhydroxide, and belongs to a technology for realizing the separation of sulfur from the surface of iron oxyhydroxide without destroying the structure of the iron oxyhydroxide. Background technique [0002] Ferric oxyhydroxide is neutral, and its main crystal forms include α-FeooH, β-FeooH, γ-FeooH and amorphous ferric oxyhydroxide. It is one of the important desulfurizers, especially for the 2 It has irreplaceable advantages in the desulfurization of sulfur-containing gases. [0003] The desulfurization principle of iron oxyhydroxide is: hydroxyl (-OH) and H in iron oxyhydroxide 2 After S dissociation, the HS is replaced by FeSSH to achieve the effect of desulfurization. When the iron oxyhydroxide reaches its sulfur capacity, oxygen is introduced into it to regenerate the iron oxyhydroxide, and then it can be recycled. The specific desulfurization and regeneration reaction equation of iron oxyhyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/027C01G49/02B01D53/81B01D53/52B01D53/96
CPCB01D53/52B01D53/81B01D53/96C01B17/027C01G49/02
Inventor 孙培志熊杰明黄龙张志民
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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