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Ferrous air oxidation reaction catalyst

A technology of air oxidation and catalyst, which is applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, oxidized water/sewage treatment, etc., which can solve the problems of low cost and long time

Active Publication Date: 2014-05-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using air to oxidize the ferrous ions in the pickling wastewater, the cost of this method is low, but the time is too long. Generally, it takes several hours for complete oxidation, and the residence time of the pickling wastewater in the neutralization tank cannot reach several hours.

Method used

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  • Ferrous air oxidation reaction catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Preparation of ferrous oxidation reaction catalyst (by weight): 20 parts of sodium nitrite, 15 parts of copper sulfate, 5 parts of nitric acid, 15 parts of citric acid, 5 parts of hydroxyethylene diphosphonic acid, about 0.5 parts of anti-mildew agent, 39.5 parts of deionized water were added into 1000ml beakers, and the catalyst was obtained by stirring evenly.

[0029] Preparation of test water: Weigh 4.536 g of ferrous chloride, dissolve it in 1000 ml of deionized water, adjust the water to pH 1.0 with hydrochloric acid, and obtain simulated pickling wastewater. The water is neutralized with milk of lime to a pH value of 5-6 to obtain test water to simulate on-site acid wastewater conditions.

[0030] Test process: use the air oxidation method to oxidize ferrous iron, add 200ml of ferrous oxidation reaction catalyst to the test water, fully aerate and stir the beaker, and take samples every 15 minutes to analyze the content of ferrous ions.

Embodiment 2

[0032] Preparation of ferrous oxidation reaction catalyst (by weight): 25 parts of potassium nitrite, 15 parts of copper chloride, 3 parts of nitric acid, 15 parts of citric acid, 5 parts of hydroxyethylene diphosphonic acid, about 0.5 parts of anti- Mold agent, 36.5 parts of deionized water were added into 1000ml beakers, and the catalyst was obtained by stirring evenly.

[0033] Test water and test process refer to embodiment 1.

Embodiment 3

[0035] Preparation of ferrous oxidation reaction catalyst (by weight): 25 parts of sodium nitrite, 15 parts of copper nitrate, 4 parts of nitric acid, 15 parts of tartaric acid, 4 parts of diethylenetriaminepentamethylenephosphonic acid, about 0.5 parts of Antifungal agent, 36.5 parts of deionized water were added into a 1000ml beaker, and stirred evenly to obtain the required catalyst.

[0036] Test water and test process refer to embodiment 1.

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PUM

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Abstract

The invention discloses a ferrous air oxidation reaction catalyst which comprises the components in parts by weight: 10-30 parts of nitrite, 10-20 parts of soluble copper salt, 2-10 parts of strong oxidization acid, 8-20 parts of a copper complexing agent, 2-8 parts of a copper ion stabilizing agent, 0.3-0.8 part of a mildew preventive and 32-49 parts of deionized water. All components in the catalyst can have reaction with ferric ions and oxygen molecules at the same time, so that the activity of a reaction process is reduced; therefore, the ferric ion oxidization reaction speed is greatly increased, and the oxidization reaction time is shortened.

Description

technical field [0001] The invention relates to a waste water treatment agent containing high content of ferrous ions, more specifically, to a ferrous air oxidation reaction catalyst. Background technique [0002] When steel plates or other steel components are pickled, waste water containing a large amount of ferrous ions and ferric ions is produced. Except for part of the waste water being used to make polyferrous products or iron oxide powder, most of the waste water must be used because it cannot be used. Perform neutralization and precipitation treatment. [0003] When the pickling wastewater is neutralized, the pH of the aqueous solution exceeds 8 before the ferrous ions start to precipitate, and the pH of the complete precipitation is about 11. Ferric ions begin to precipitate when the pH exceeds 3.5, and the pH of complete precipitation is 6. The pH range of ferrous ion precipitation is much higher than that of ferric ion, and it is more difficult to deal with. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/30C02F1/74
Inventor 李宏朱诚钟铭黄振艺
Owner BAOSHAN IRON & STEEL CO LTD
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