Method for producing nickel oxide from nickel-plating wastewater

A technology of nickel oxide and nickel plating, applied in chemical instruments and methods, preparation of nickel oxide/nickel hydroxide, nickel compounds, etc., can solve problems that have not been applied in industry, achieve increased added value, reduce costs, and increase nickel The effect of the value

Inactive Publication Date: 2017-01-11
SUZHOU ZHANQING ENVIRONMENT PROTECTION TECHCO LTD +1
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Problems solved by technology

Therefore, it is not used in industry

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  • Method for producing nickel oxide from nickel-plating wastewater

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Embodiment Construction

[0022] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0023] Such as figure 1 Shown, the present invention mainly comprises four aspects technical contents:

[0024] 1) Use the extraction process to extract nickel plating waste liquid to obtain nickel-extracted organic matter; the organic matter used in the present invention is a phosphate compound extractant, and the ratio of the compound organic matter to sulfonated kerosene is 1:1-2, or use trioctyl Methyl ammonium chloride is used as an extractant, and the total organic matter: nickel plating wastewater is extracted for 3-5 minutes under the condition of 1:1, and the extracted organic matter is obtained after phase separation.

[0025] 2) Sulfuric acid and precipitation tail liquid are carried out back-extraction; the extracted organic matter is back-extracted with sulfuric acid, the concentration of sulfuric acid is 1-3mol / L, and the organic ...

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Abstract

The invention discloses a method for producing nickel oxide from nickel-plating wastewater. The method includes the steps of 1), based on the extraction technology, extracting the nickel-plating wastewater to extract organ matter; 2), subjecting the organic matter to reverse extraction; 3), subjecting reverse extraction liquid to sediment by the aid of oxalic acid to obtain nickel oxalate intermediates; 4), calcining the nickel oxalate intermediates to obtain nickel oxide products with purity larger than 99.5%. With the method for producing the nickel oxide from the nickel-plating wastewater, cost in recycling nickel is reduced, value of the nickel is increased, and meanwhile, new technical strategies for disposal of hazardous waste of the nickel-plating wastewater and the like are put forward.

Description

technical field [0001] The invention relates to the recovery and reuse of valuable metals from heavy metal wastewater, in particular to a method for producing nickel oxide from nickel plating wastewater. Background technique [0002] The nickel plating industry produces a large amount of nickel-containing wastewater. Nickel and its compounds are heavy metal pollutants that must be treated first in my country's environment. The accumulation of nickel in the water environment will cause serious harm to aquatic plants and aquatic animal systems. And affect human health through the bioaccumulation of food chain. Strictly controlling the nickel content in the environment is of great significance for ensuring the safety of the ecological environment and human health. [0003] Nickel-plating wastewater mainly includes pre-treatment wastewater, nickel-plating rinse wastewater, nickel-plating post-treatment wastewater and nickel-plating wastewater. Nickel plating wastewater treatmen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F1/62C01G53/04C02F103/16C02F101/20
CPCC02F1/26C01G53/003C01G53/04C02F2101/20C02F2103/16
Inventor 朱国才刘靖王磊
Owner SUZHOU ZHANQING ENVIRONMENT PROTECTION TECHCO LTD
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