Recycling and Utilization Method of Board Washing Wastewater Produced in PCB Etching Section
A technology for washing plates and wastewater, applied in recycling technology, metal recovery, and improvement of process efficiency, can solve problems such as high cost, waste of copper resources, and deterioration of water quality, and achieve low cost and small footprint for wastewater treatment. , the effect of water stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0021] Weigh 50 g of 001×7 strong acid cationic resin pretreated according to the method recorded in the national standard GB5476-85 "Ion Exchange Resin Pretreatment Method", put it into a chromatography column with a diameter of 4 cm, and empty the air bubbles in the resin layer.
[0022] Add 5% HCl to the ammonia etching washing water in Table 1 to adjust the pH value to 6, filter, and then pass through the chromatographic column to control the influent flow rate to 20ml min -1 , when 6.5L passes through the column, the concentration of ammonia nitrogen in the effluent is 15mg·L -1 , Cu 2+ Concentration less than 0.2mg·L -1 Resin breakthrough is considered at this point.
[0023] Using 15% Hcl200ml to elute the chromatography column, the concentration of ammonia nitrogen in the eluent is Cu 2+ Concentration 3.28g·L -1 , ammonia nitrogen concentration 9.05g·L -1 . The eluate is concentrated and evaporated after recovering copper to obtain ammonium chloride. The regenera...
Embodiment 2
[0025] Weigh 50 g of 001×7 strong acid cationic resin pretreated according to the method recorded in the national standard GB5476-85 "Ion Exchange Resin Pretreatment Method", put it into a chromatography column with a diameter of 4 cm, and empty the air bubbles in the resin layer.
[0026] Add 5% NaOH to the acid etching washing water in Table 1 to adjust the pH value to 4, filter, and then pass through the chromatographic column to control the influent flow rate to 20ml min -1 , the concentration of ammonia nitrogen in the effluent when 11.5L passes through the column is 15mg·L -1 , Cu 2+ Concentration less than 0.2mg·L -1 Resin breakthrough is considered at this point.
[0027] Using 15% Hcl200ml to elute the chromatography column, the concentration of ammonia nitrogen in the eluent is Cu 2+ Concentration 15.58g·L -1 , ammonia nitrogen concentration 3.81g L -1 . The eluate is concentrated and evaporated after recovering copper to obtain ammonium chloride. The regenerat...
Embodiment 3
[0029] Weigh 50 g of 001×7 strong acid cationic resin pretreated according to the method recorded in the national standard GB5476-85 "Ion Exchange Resin Pretreatment Method", put it into a chromatography column with a diameter of 4 cm, and empty the air bubbles in the resin layer.
[0030] Add 5% NaOH to the ammonium persulfate micro-etching washing water in Table 1 to adjust the pH value to 4, filter, and then pass the chromatographic column to control the influent flow rate to 20ml min -1 , the concentration of ammonia nitrogen in the effluent is 15mg·L when the column is 3L -1 , Cu 2+ Concentration less than 0.2mg·L -1 Resin breakthrough is considered at this point.
[0031] Using 15% Hcl200ml to elute the chromatography column, the concentration of ammonia nitrogen in the eluent is Cu 2+Concentration 8.91g·L -1 , ammonia nitrogen concentration 6.40g·L -1 . The eluate is concentrated and evaporated after recovering copper to obtain ammonium chloride. The regenerated r...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More