A kind of regeneration method of iron oxide desulfurizer

An iron oxide desulfurizer and desulfurizer technology, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve problems such as air, water environment and water source pollution, high cost of organic solvents, human body and environmental hazards, etc., to achieve High sulfur capacity, strong solvency, time and cost saving effects

Active Publication Date: 2015-12-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The cost of the organic solvent used in the above method is relatively high, and it has serious harm to the human body and the environment, and can cause pollution to the air, water environment and water source, and there are certain difficulties in the treatment of waste solvents.
In the flotation sulfur recovery involved in CN101898108A, the overflowing sulfur still needs to be extracted and purified by organic solvent, and the flotation method has problems of foaming and clogging in practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Prepare amorphous iron oxyhydroxide desulfurizers (A) and (B) according to CN101898108A. The properties of the desulfurizer (A) include 97wt% of amorphous iron oxyhydroxide in terms of mass percentage of the desulfurizer, and the balance is sodium sulfate and water, the particle size is 100-200 mesh, and the sulfur capacity is 52%; the properties of the desulfurizer (B) are: based on the mass percentage of the desulfurizer, it contains 88wt% of amorphous iron oxyhydroxide, and the balance is sodium sulfate, water and binder agent, a spherical desulfurizer, with a sulfur capacity of 47%.

[0022] (2) The desulfurization agent (A) carries out the desulfurization reaction, and the H 2 After the S penetrates, discharge the waste desulfurizer for oxidation treatment, oxidation conditions: air atmosphere, 60°C temperature, treatment for 5 hours.

[0023] (3) Add the desulfurizer treated in step (2) to catalytic cracked diesel oil with a distillation range of 240-260°C at...

Embodiment 2

[0025] (1) Take the desulfurizing agent (A) of Example 1 for desulfurization reaction, and wait for H 2 After the S penetrates, discharge the waste desulfurizer for oxidation treatment, oxidation conditions: air atmosphere, 80°C temperature, treatment for 4 hours.

[0026] (2) Add the desulfurizer (sulfur content: 5.8wt%) treated in step (1) to catalytic cracked diesel oil with a distillation range of 260-280°C at 100°C, the mass of desulfurizer (A) and catalytic cracked diesel oil The ratio is 1:50, stirred for 1 hour, filtered to obtain desulfurization liquid and desulfurization agent material, the desulfurization liquid is cooled to 10°C, and elemental sulfur is recovered, the purity of elemental sulfur is 95%, and the desulfurization agent material is dried to obtain a regenerated desulfurization agent (A2) , carry out the sulfur capacity test, the sulfur capacity is 50%.

Embodiment 3

[0028] (1) Take the desulfurizing agent (A) of Example 1 for desulfurization reaction, and wait for H 2 After S penetrates, discharge the spent desulfurizer and add it to catalytic cracked diesel oil with a distillation range of 300-330°C at 120°C. The mass ratio of desulfurizer (A) to catalytic cracked diesel oil is 1:80.

[0029] (2) Air is introduced into the mixture in step (1), stirred for 2 hours, and desulfurized liquid and desulfurized agent materials are obtained by filtration. The desulfurized liquid is cooled to 15°C, and elemental sulfur is recovered. After drying, the regenerated desulfurizer (A3) was obtained, and the sulfur capacity test was carried out, and the sulfur capacity was 48.6%.

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Abstract

The invention discloses a regeneration method for iron oxide desulfurizer. The regeneration method comprises the following steps: (1) conducing oxidation treatment on the iron oxide desulfurizer through which sulphur penetrates, and mixing the oxidized iron oxide desulfurizer with catalyzed and cracked diesel oil at 40 to 150 DEG C for 0.1 to 10 hours, preferably, 1 to 3 hours; (2) conducting solid-liquid separation on the mixture obtained in step (1) to obtain a doctor solution and a desulfurizer material, cooling the liquid-phase to be 0 to 30 DEG C, preferably, 10 to 25 DEG C, recycling elemental sulfur, and drying the desulfurizer material to obtain a regenerative desulfurizer, wherein the doctor solution can be recycled. The regeneration method has the advantages that the sulfur capacity of the regenerative desulfurizer is high; the purity of recycled brimstone is relatively high; the operation is simple; the cost is low.

Description

technical field [0001] The invention relates to a regeneration method of a dry desulfurizer, in particular to a regeneration method of an iron oxide desulfurizer. Background technique [0002] Due to the advantages of simple equipment, stable operation and high desulfurization precision, dry desulfurization has been more and more widely used. At present, in dry desulfurization, many desulfurizers used at home and abroad can be divided into: iron-based desulfurizers, activated carbon desulfurizers, aluminum-based desulfurizers, zinc-based desulfurizers and molecular sieve desulfurizers. Iron-based desulfurizer has become a widely used desulfurizer because of its cheap and easy to obtain, abundant resources, high desulfurization rate, high sulfur capacity, and easy regeneration. [0003] During the long-term continuous use of the dry desulfurizer, the sulfur generated by the desulfurization reaction continuously accumulates on the surface of the desulfurizer or adheres and fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/96B01D53/81B01D53/48C01B17/027
Inventor 刘淑鹤方向晨韩建华
Owner CHINA PETROLEUM & CHEM CORP
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