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Method for separating FeOOH and sulfur and applications of sulfur free FeOOH

A technology for iron oxyhydroxide and separation of hydroxyl groups, which is applied in the direction of iron oxide/iron hydroxide, separation methods, chemical instruments and methods, etc. It can solve the problems such as the decline of desulfurization ability of iron oxyhydroxide, and achieve the effect of ensuring desulfurization properties

Active Publication Date: 2018-07-24
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • 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 separating iron oxyhydroxide and sulfur, and then provide a method for reclaiming sulfur from sulfur-containing iron oxyhydroxide

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  • Method for separating FeOOH and sulfur and applications of sulfur free FeOOH
  • Method for separating FeOOH and sulfur and applications of sulfur free FeOOH
  • Method for separating FeOOH and sulfur and applications of sulfur free FeOOH

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Embodiment 1

[0036] This embodiment provides a method for separating ferric oxyhydroxide and sulfur, comprising the steps of:

[0037] (1) Air-drying sulfur-containing iron oxyhydroxide at 10°C until its water content is 5wt%;

[0038] (2) Stir and mix the air-dried sulfur-containing iron oxyhydroxide and ethylbenzene at 90° C. for 2 hours according to the mass ratio of 1:10, and separate the solid and liquid to obtain a sulfur-containing solvent and iron oxyhydroxide A from which sulfur has been removed;

[0039] (3) The sulfur-containing solvent is cooled and crystallized at a temperature of 5° C., and the solid and liquid are separated to obtain sulfur A.

Embodiment 2

[0041] This embodiment provides a method for separating ferric oxyhydroxide and sulfur, comprising the steps of:

[0042] (1) drying sulfur-containing iron oxyhydroxide at 90°C until its water content is 0.1wt%;

[0043] (2) stirring and mixing the air-dried sulfur-containing ferric 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 ferric 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 to the mass ratio of 1:30, and separate the solid and liquid to obtain the third sulfur-containing solvent and iron oxyhydroxide B from...

Embodiment 3

[0048] This embodiment provides a method for separating ferric oxyhydroxide and sulfur, comprising the steps of:

[0049] (1) air-drying sulfur-containing iron oxyhydroxide at 25°C until its water content is 4wt%;

[0050] (2) stirring and mixing the air-dried sulfur-containing ferric 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 ferric 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 hours, and separate the solid and liquid to obtain the third sulfur-containing solvent and iron oxyhydroxide C from which sulfur h...

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Abstract

The invention provides a method for separating FeOOH and sulfur and applications of sulfur free FeOOH. According to the method, the water content of sulfur containing FeOOH is strictly controlled, onthe premise that sulfur and FeOOH are separated efficiently, the desulfurization performance of FeOOH is guaranteed, and the purity of recovered sulfur is ensured. If the water content of FeOOH is toohigh, FeOOH is dispersed in an organic solvent to form micro particles, the desulfurization performance of FeOOH is reduced, and recovered sulfur contains a large amount of iron.

Description

technical field [0001] The invention relates to the technical field of iron oxyhydroxide, and belongs to a technology for realizing the separation of the surface of iron oxyhydroxide from sulfur without destroying the structure of 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 oxyhydroxi...

Claims

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Application Information

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IPC IPC(8): C01G49/02C01B17/033B01D53/81B01D53/52
CPCB01D53/52B01D53/81B01D2251/10C01B17/033C01G49/0009C01G49/02C01P2004/61C01P2006/12C01P2006/14C01P2006/16
Inventor 黄龙孙培志熊杰明张志民
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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