Iron supplement for chelating iron desulfurization solution as well as preparation method thereof

A technology for desulfurization solution and iron supplementation, applied in separation methods, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc.

Active Publication Date: 2014-06-25
宁夏胜蓝化工环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the deficiency that the existing iron supplements contain a large amount of harmful impurity anions, and provide a Cl-free - , NO 3 - , SO 4 2- Anionic iron supplements and methods of making the same

Method used

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  • Iron supplement for chelating iron desulfurization solution as well as preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 550 Kg deionized water, 790 Kg EDTA, 100 Kg Fe to the stirred tank successively 2 o 3 ·H 2 O, and then add NaOH to the reactor to adjust the pH value between 7 and 9, raise the temperature to 50 ° C, and stir for 3 hours to obtain the iron supplement, and the total iron content in it is 58 g / L according to analysis. The desulfurization performance of the iron supplement is shown in Table 1.

Embodiment 2

[0027] Add 950 Kg deionized water, 400 Kg EDTA, 100 Kg Fe to the stirred tank successively 2 o 3 ·H 2 O, and then add NaOH to the reaction kettle to adjust the pH value between 7 and 9, raise the temperature to 80°C, and stir for 4 hours to obtain the iron supplement, and the total iron content in it is 57 g / L by analysis. The desulfurization performance of the iron supplement is shown in Table 1.

Embodiment 3

[0029] Add 980 Kg of deionized water, 665 Kg of HEDTA, 100 Kg of Fe to the stirred tank in turn 2 o 3 ·FeO·H 2 O, then add KOH to the reaction kettle to adjust the pH value between 7 and 9, raise the temperature to 60°C, stir and react for 5 hours to obtain the iron supplement, and the total iron content in it is analyzed to be 50g / L. The desulfurization performance of the iron supplement is shown in Table 1.

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Abstract

The invention relates to an iron supplement for a chelating iron desulfurization solution as well as a preparation method thereof. The iron supplement is prepared from hydrous oxide of iron (FexOy.H2O) as well as a metal chelating agent and alkaline by reaction at certain temperature. Compared with the conventional iron supplements, because the iron supplement does not contain impurity anions, such as Cl<1->, NO3<1-> and SO4<-2>, the problem of equipment corrosion caused by Cl<1-> is eliminated effectively; the problem of subsequent wastewater treatment caused by NO3<1-> is also eliminated; most importantly, the separation by crystallization of salt caused by enrichment of SO4<-2> is prevented; the loss of the desulfurization solution can be reduced obviously; the running safety of equipment can be ensured.

Description

technical field [0001] The invention relates to a preparation method of a catalyst in the field of environmental protection desulfurization, in particular to an iron supplement in complex iron desulfurization and a preparation method thereof. Background technique [0002] Complex iron desulfurization technology has been widely used in refineries, natural gas processing plants and sewage treatment plants 2 The exhaust gas of S is treated and converted into sulfur to meet the requirements of environmental protection emissions. Complex iron desulfurization technology uses a complex iron desulfurization solution that is compatible with each other. In this desulfurization solution, the iron that exists in a complex form plays a role in desulfurization. The reaction principle is as follows: [0003] h 2 S + NaOH → Na + + HS － + H 2 o [0004] HS － + 2Fe 3+ (complexed state) → 2Fe 2+ (complexed state) + H + + S↓ [0005] 1 / 2O 2 (in solution) + H 2 O +2 Fe 2+ (comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01D53/78B01D53/86B01D53/52
Inventor 沈俊赵燕
Owner 宁夏胜蓝化工环保科技有限公司
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