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Method for removing sulfur on hydroxyl oxidize iron and application of sulfur-removed hydroxyl oxidize iron

A technology of iron oxyhydroxide and iron oxide, which is applied in the direction of iron oxide/iron hydroxide, chemical instruments and methods, separation methods, etc., can solve the problems such as the decline of desulfurization ability of iron oxyhydroxide, achieve easy recycling, ensure desulfurization performance, The effect of high solubility

Active Publication Date: 2018-07-20
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

[0010] Therefore, the technical problem to be solved by 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 removing sulfur on iron oxyhydroxide and a hydroxyl oxidation method for removing sulfur. iron application

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  • Method for removing sulfur on hydroxyl oxidize iron and application of sulfur-removed hydroxyl oxidize iron
  • Method for removing sulfur on hydroxyl oxidize iron and application of sulfur-removed hydroxyl oxidize iron
  • Method for removing sulfur on hydroxyl oxidize iron and application of sulfur-removed hydroxyl oxidize iron

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Embodiment 1

[0033] This embodiment provides a method for removing sulfur on iron oxyhydroxide, comprising the steps of:

[0034] (1) At a temperature of 10° C., air-dry the sulfur-containing iron oxyhydroxide until its water content is 5 wt %;

[0035] (2) Stir and mix the air-dried sulfur-containing iron oxyhydroxide and toluene 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;

[0036] (3) The sulfur-containing solvent is cooled and crystallized at a temperature of 5° C., and solid-liquid separation is performed to obtain sulfur A (soluble sulfur).

Embodiment 2

[0038] This embodiment provides a method for removing sulfur on iron oxyhydroxide, comprising the steps of:

[0039] (1) drying sulfur-containing iron oxyhydroxide at 90°C until its water content is 0.1wt%;

[0040] (2) Stirring and mixing the air-dried sulfur-containing iron oxyhydroxide and toluene at 80° C. for 1 hour according to the mass ratio of 1:15, and separating the solid and liquid to obtain the first sulfur-containing solvent and the first iron oxyhydroxide;

[0041] (3) stirring and mixing the first iron oxyhydroxide and toluene at 80° C. for 1 hour according to the mass ratio of 1:15 to obtain the second sulfur-containing solvent and the second iron oxyhydroxide;

[0042] (4) Stir and mix the second iron oxyhydroxide and toluene at 80° C. for 1 hour according to the mass ratio of 1:15, and separate the solid and liquid to obtain the third sulfur-containing solvent and iron oxyhydroxide B from which sulfur has been removed;

[0043] (5) Combine the first, second ...

Embodiment 3

[0045] This embodiment provides a method for removing sulfur on iron oxyhydroxide, comprising the steps of:

[0046] (1) air-drying sulfur-containing iron oxyhydroxide at 20°C until its water content is 0.2wt%;

[0047] (2) Stirring and mixing the air-dried sulfur-containing iron oxyhydroxide and toluene at 50° C. for 3 hours according to the mass ratio of 1:7, and separating the solid and liquid to obtain the first sulfur-containing solvent and the first iron oxyhydroxide;

[0048] (3) Stir and mix the first iron oxyhydroxide and toluene at 50°C for 3 hours according to the mass ratio of 1:7, and separate the solid and liquid to obtain the second sulfur-containing solvent and the second iron oxyhydroxide;

[0049] (4) Stir and mix the second iron oxyhydroxide and toluene at 50°C for 3 hours according to the mass ratio of 1:7, and separate the solid and liquid to obtain the third sulfur-containing solvent and iron oxyhydroxide C from which sulfur has been removed;

[0050] (5...

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Abstract

The invention provides a method for removing sulfur on hydroxyl oxidize iron. By strictly controlling the water content of sulfur-containing hydroxyl oxidize iron, the desulfuration capability of hydroxyl oxidize iron and the purity of recycled sulfur are effectively ensured on the premise of efficiently separating sulfur from hydroxyl oxidize iron, which is because when the water content of hydroxyl oxidize iron is too high, the water is dispersed into fine particles in an organic solvent, which not only reduces the desulfurization capability of hydroxyl oxidize iron, but also causes the recycled sulfur to contain a large number 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 and 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 oxyhydroxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02B01D53/96B01D53/81B01D53/52C01B17/033
CPCB01D53/52B01D53/81B01D53/96B01D2251/10C01B17/033C01G49/0009C01G49/02C01P2006/80
Inventor 熊杰明黄龙孙培志张志民
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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