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Method for directly recovering phosphorus from chemical nickel-plating waste liquid

A technology of electroless nickel plating and waste liquid, which is applied in the direction of chemical instruments and methods, preparation of phosphorus, metallurgical wastewater treatment, etc., can solve the problems of secondary pollution, long treatment cycle, waste of phosphorus resources, etc., to reduce environmental pressure, treat The effect of mature technology and simple operation

Inactive Publication Date: 2014-02-19
埃梯星(厦门)电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the electronics industry in my country, the demand for electroless nickel plating on the surface of electronic and precision mechanical products has also increased substantially. The more prominent, the State Environmental Protection Administration (GB8978-1996 1998.01.01 implementation) stipulates in the comprehensive sewage discharge standard that the discharge of phosphorus (P) is 1 ml (1PPm). According to this discharge standard, it is difficult to achieve a stable level with conventional phosphorus treatment processes. Emission standards and high disposal costs
[0003] At present, the treatment of phosphorus in electroless nickel plating waste liquid mostly adopts the precipitation method. The precipitation method is to adjust the pH to above 10 with sodium oxide, add hydrogen peroxide to aerate, add lime and flocculant to filter through the filter press, and the phosphorus (P ) sandwiched in the sludge, this treatment method not only has a long treatment period, consumes a lot of chemical materials, wastes a lot of phosphorus resources, but also causes secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Step 1): Pour 1000L phosphorus-containing electroless nickel plating waste liquid into the chemical nickel plating waste liquid tank, heat the temperature to 85~100°C with steam, and use steam to evaporate the phosphorus-containing electroless nickel plating waste liquid to the precipitation saturation point of phosphorus , add 3L of sodium acetate with a temperature of 40~50°C and a concentration of 1000g / L as a catalytic crystallization agent, add iron wire or cylindrical iron mesh as a phosphorus extraction carrier, cool down to 5~10°C, and treat it on the electroless nickel plating waste In the liquid tank, more than or equal to 90% of the phosphorus in the electroless nickel plating waste solution is deposited on the phosphorus extraction carrier;

[0013] Step 2): Leave the remaining 100L of the electroless nickel plating waste liquid after phosphorus extraction in step 1) in the electroless nickel plating waste liquid tank, and wait for the next extraction, that i...

Embodiment 2

[0015] Step 1): Pour 1000L phosphorus-containing electroless nickel plating waste liquid into the chemical nickel plating waste liquid tank, heat the temperature to 85~100°C with steam, and use steam to evaporate the phosphorus-containing electroless nickel plating waste liquid to the precipitation saturation point of phosphorus , add 4L of sodium acetate with a temperature of 40~50°C and a concentration of 1000g / L as a catalytic crystallization agent, add iron wire or cylindrical iron mesh as a phosphorus extraction carrier, cool down to 5~10°C, and treat it on the electroless nickel plating waste In the liquid tank, more than or equal to 90% of the phosphorus in the electroless nickel plating waste solution is deposited on the phosphorus extraction carrier;

[0016] Step 2): Leave the remaining 100L of the electroless nickel plating waste liquid after phosphorus extraction in step 1) in the electroless nickel plating waste liquid tank, and wait for the next extraction, that i...

Embodiment 3

[0018] Step 1): Pour 1000L phosphorus-containing electroless nickel plating waste liquid into the chemical nickel plating waste liquid tank, heat the temperature to 100°C with steam, evaporate the phosphorus-containing electroless nickel plating waste liquid with steam to the precipitation saturation point of phosphorus, add 5L of sodium acetate with a temperature of 50°C and a concentration of 1000g / L is used as a catalyst, iron wire or cylindrical iron mesh is added as a phosphorus extraction carrier, the temperature is lowered to 5-10°C, and the chemical More than or equal to 90% of the phosphorus in the nickel plating waste solution is deposited on the phosphorus extraction carrier;

[0019] Step 2): Leave the remaining 100L of the electroless nickel plating waste liquid after phosphorus extraction in step 1) in the electroless nickel plating waste liquid tank, and wait for the next extraction, that is, add to step 1) for recycling treatment.

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PUM

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Abstract

The invention discloses a method for directly recovering phosphorus from a chemical nickel-plating waste liquid, relates to an industrial waste liquid treatment method, and provides a stable phosphorus comprehensive treatment process capable of replacing the existing traditional treatment methods such as a precipitation method, reducing cost and recycling phosphorus resource. The method comprises the following steps of: injecting the chemical nickel-plating waste liquid in a chemical nickel-plating waste liquid tank; evaporating to the precipitation saturation point of phosphorus by vapour; adding a catalyst and a phosphorus extraction carrier; and depositing not less than 90% of phosphorus in the chemical nickel-plating waste liquid on the phosphorus extraction carrier in the chemical nickel-plating waste liquid tank after cooling treatment, wherein the residual liquid of the chemical nickel-plating waste liquid after phosphorus extraction can be recycled and continue to be treated, namely, direct phosphorus extraction in the chemical nickel-plating waste liquid can be finished.

Description

technical field [0001] The invention relates to a treatment of industrial waste liquid, in particular to a method for directly extracting phosphorus from phosphorus-containing electroless nickel plating waste liquid. Background technique [0002] With the rapid development of the electronics industry in my country, the demand for electroless nickel plating on the surface of electronic and precision mechanical products has also increased substantially. The more prominent, the State Environmental Protection Administration (GB8978-1996 1998.01.01 implementation) stipulates in the comprehensive sewage discharge standard that the discharge of phosphorus (P) is 1 ml (1PPm). According to this discharge standard, it is difficult to achieve a stable level with conventional phosphorus treatment processes. emission standards and are expensive to dispose of. [0003] At present, the treatment of phosphorus in electroless nickel plating waste liquid mostly adopts the precipitation method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C01B25/02C02F103/16
Inventor 刘景祥李兵刘明刘政刘超俞宏威
Owner 埃梯星(厦门)电子科技有限公司