Online resourceful treatment method for chemical copper plating waste liquid

A technology of chemical copper plating and treatment method, applied in chemical instruments and methods, liquid chemical plating, metallurgical wastewater treatment, etc., can solve the problems of low copper recovery rate, low copper ion removal rate, and substandard waste liquid treatment indicators. , to reduce the burden and improve the recovery rate

Pending Publication Date: 2020-08-07
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the prior art, such as low copper recovery rate of electroless copper plating waste liquid, low removal rate of copper ions, and substandard waste liquid treatment index, etc., and further provide an online resource treatment of electroless copper plating waste liquid The method can effectively improve the recovery rate of copper in the waste liquid, the removal rate of copper ions and the purification rate of water quality

Method used

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  • Online resourceful treatment method for chemical copper plating waste liquid
  • Online resourceful treatment method for chemical copper plating waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0027] like figure 1 Shown, a kind of online resource processing method of electroless copper plating waste liquid, comprises the following steps:

[0028] (1) Autocatalytic reaction: introduce the filtered electroless copper plating waste liquid into the autocatalytic reactor, adjust the pH to 13.5, control the temperature at 65°C, and add copper-based catalysts according to 6g / L, copper-based catalysts According to weight percentage, it includes: 26% of nano-copper, 0.5% of cerium oxide, and the balance of nano-cuprous oxide. Under the condition of electromagnetic oscillation, the self-catalytic reduction reaction is carried out by aeration and stirring, the copper ions in the electroless copper plating waste liquid are reduced to copper simple substances, the copper simple substances are recycled and filtered, and the circulating water is returned to the self-reaction catalyst until the electroless copper plating After the concentration of copper ions in the waste liquid i...

Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, the difference is: as figure 2 As shown, in step 1, the self-catalytic reactor includes a reaction tank 1, a catalyst delivery frame 4, an induction coil 9, and a copper element separation box 15. The reaction tank 1 is made of a ceramic insulating material, and the reaction tank 1 is provided with a movable insertion catalyst delivery frame. Jack 10 of 4, and electroless copper plating waste liquid inlet 2 and lye inlet 3, the catalyst throwing frame 4 is provided with backflow port 22, and reaction tank 1 is also provided with temperature probe 5, pH probe 6, copper ion detection probe 7 and a heating rod 8, the bottom of the reaction tank 1 is provided with an aeration tube 11 for aeration and stirring, the aeration tube 11 is connected with an external air pump 12, and the induction coil 9 is wound on the outer wall of the reaction tank 1, and the induction coil 9 The oscillating circuit is electrically connect...

Embodiment 3

[0038] This embodiment is basically the same as Embodiment 2, and the difference points out that, as figure 2 As shown, a backflow box 18 is provided on the pipeline connected to the backflow port 22 , and an ultrasonic vibrating rod 19 is provided in the backflow box 18 for ultrasonically activating the backflow water accumulated in the backflow box 18 . The circulating wastewater activated by ultrasound is more likely to react with copper-based catalysts to improve the reduction efficiency of copper ions.

[0039] Water quality testing was carried out on the purified wastewater, the detected amount of copper in the effluent was 0.07mg / L, the effective removal rate of copper ions was 97.8%, the recovery rate of simple copper was 90%, the detected amount of ammonia nitrogen was 2mg / L, and the detected amount of COD was 26mg / L , the index after treatment of electroless copper plating waste liquid can reach the standard in Table 2 of "Electroplating Pollutant Discharge Standard...

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Abstract

The invention discloses an online resourceful treatment method for chemical copper plating waste liquid. A copper-based catalyst is employed and used for carrying out an autocatalytic reaction on thechemical copper plating waste liquid in an autocatalytic reactor; copper ions in the waste liquid are reduced into elemental copper and are recycled; the treated waste liquid enters a three-dimensional electrolysis device; organic substances such as a reducing agent and a complexing agent in the waste liquid are efficiently oxidized; then, the method includes further flocculating and precipitatingthe waste liquid by adopting a chemical precipitation method to remove ammonia nitrogen and macromolecular substances in the water; and finally, membrane filtration equipment is adopted for purification treatment and is used for further intercepting residual copper ions in the wastewater and returning the residual copper ions to the autocatalytic reactor for circular treatment, so that the copperions in the waste liquid can be recycled to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of chemical electroplating, and in particular relates to an online resource treatment method of chemical copper plating waste liquid. Background technique [0002] Electroless copper plating is an important plating type in my country's electroplating industry, and is widely used in the electronics industry and home appliance manufacturing. However, the electroless copper plating waste liquid contains a large amount of heavy metal copper, formaldehyde, buffering agent, and complexing agent, which is difficult to deal with. [0003] Due to the complex composition of the electroless copper plating waste liquid, it contains not only many types of pollution factors but also high concentration, it is extremely difficult to directly treat, and there is still a considerable amount of valuable metal copper in it. If it is directly discarded, it will cause serious waste of resources. This is contrary to the sustainab...

Claims

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Application Information

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IPC IPC(8): C02F9/12B01J23/83C22B7/00C22B15/00C02F101/20C02F103/16
CPCC02F9/00B01J23/83C22B7/006C22B15/0089C02F1/66C02F1/70C02F1/4672C02F1/72C02F1/44C02F1/52C02F1/484C02F2103/16C02F2101/20C02F2209/02C02F2209/06C02F2301/046C02F2101/30C02F2101/16C02F2201/4614C02F2201/4615C02F1/46114C02F1/5263C02F1/56C02F1/5254C02F1/5236B01J23/72B01J23/94B01J38/48C23C18/1617C23C18/38B01J37/04B01J37/08C02F1/001C02F1/447C02F1/46109C02F1/4678C02F2001/46152C02F2209/08B01J35/393
Inventor 杜建伟贺框唐娜关伟贾燕胡小英张明杨李铭珊黄宁徐凤
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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