Ion exchange resin arsenic removal method for acidic etching liquid, resin regeneration method and treatment system thereof
A technology of ion exchange resin and acid etching solution, applied in the direction of ion exchange water/sewage treatment, etc., can solve the problems of high cost of resin regeneration, poor arsenic removal effect, difficult resin regeneration, etc., to achieve low cost, easy control, Easy to clean effect
Active Publication Date: 2013-07-03
深圳市东江饲料添加剂有限公司
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[0003] Prior art methods for removing arsenic from printed circuit board acidic etching waste liquid include neutralization precipitation, sulfide precipitation, ferrite precipitation and flocculation precipitation. Some of these methods have poor arsenic removal effect, and some Can cause secondary pollution, and the cost that has is higher; The method for removing arsenic from the acidic etching waste liquid of printed circuit board in the prior art also includes ion resin exchange method, and this method has large processing capacity, simple operation and good separation effect, and has It is beneficial to the recycling of various substances in the acidic etching waste liquid, and is a good method for removing arsenic. However, the resins used in this method include activated carbon exchange resins, sulfide regeneration resins, inorganic ion exchange resins and selective chelating resins. After the treatment of arsenic removal in acidic etching waste liquid, it is difficult to regenerate these resins, and the cost of resin regeneration treatment is high, which leads to the increase of the cost of using ion resin exchange method to treat arsenic removal in acidic etching waste liquid of printed circuit boards. The promotion of resin arsenic removal method is also limited
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[0037] The present invention will be described in further detail below in conjunction with each accompanying drawing.
[0038] A method for removing arsenic by ion exchange resin used in acidic etching solution is a pretreatment process for producing basic copper chloride from printed circuit board acidic etching waste solution, comprising the following steps:
[0039] A, fresh leaching resin 941 type is packed in ion exchanger, and the chemical name category of this leaching resin is strongly acidic styrene series cation exchange resin;
[0040] B. see figure 1 pumping the acidic etching waste liquid of the printed circuit board to be treated into the ion exchanger from the inlet of the ion exchanger for arsenic removal treatment, controlling the flow rate of the acidic etching waste liquid in the ion exchanger, Let it flow in the ion exchanger for 20 to 40 minutes, and then flow out from the outlet of the ion exchanger to obtain the printed circuit board acidic etching wast...
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The invention relates to an ion exchange resin arsenic removal method for acidic etching liquid, which comprises the steps of: A) placing extraction resin in an ion exchanger; B) pumping acidic etching liquid waste into the ion exchanger, controlling the flow rate of the acidic etching liquid waste in the ion exchanger and then letting the acidic etching liquid waste flow out of the ion exchangerto obtain arsenic-removed printed circuit board acidic etching liquid waste; and C) when the adsorbing capacity of the extraction resin is saturated, conducting regeneration treatment to the extraction resin, and after the treatment is completed, using the extraction resin to continuously treat the acidic etching liquid waste; and when the removal rate of arsenic in the acidic etching liquid waste after the arsenic is removed through the ion exchanger is lower than 60 percent, replacing the extraction resin, emptying the ion exchanger at the moment and repeating the step A. Since the resin used by the ion exchange resin arsenic removal method is the extraction resin, the extraction resin is simple to regenerate, the operation is convenient, the cost is low and the ion exchange resin arsenic removal method is suitable for the arsenic removal of large-scale printed circuit board acidic etching liquid waste.
Description
【Technical field】 [0001] The present invention relates to the multi-stage treatment of removing specific dissolved substances in waste water, in particular to the method for removing arsenic from printed circuit board etching waste liquid, and in particular to the ion exchange of printed circuit board acidic etching waste liquid for the production of basic copper chloride Method for removing arsenic by resin; the present invention also relates to a method for regenerating resin in the process of removing arsenic by ion exchange resin in acidic etching waste liquid of printed circuit board, and a treatment system for removing arsenic and regenerating resin. 【Background technique】 [0002] Printed circuit board etching waste liquid (also known as PCB etching waste liquid) includes alkaline etching waste liquid and acidic etching waste liquid. Among them, the acidic etching waste liquid of printed circuit board has high content of copper and chloride ions, which is acidic and co...
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IPC IPC(8): C02F1/42
Inventor 许世爱兰永辉孙荣斌肖华邝国生高仁富彭韬
Owner 深圳市东江饲料添加剂有限公司