CN101070206A - Chemical copper-plating rinsing waste-water treatment process - Google Patents

Abstract

This invention relates to a electroless plating cuprum poaching waste water treatment craft, and the basic steps: electroless plating cuprum rinse wastewater; adjust ph value; ion exchange; hyperfiltration; reverse osmosis; pure water reclamation/ thick water circular process. The concrete process is: adjust PH value of described electroless plating cuprum poaching wastewater to 3 to 10, then pass ion exchange resin, bring heavy metal ion of wastewater to have an exchange with same style ion of ion-exchange resin, to reclaim heavy metal resource of wastewater; pass one hyperfiltration step to remove macromolecule impurity in the wastewater, then carry out reverse osmosis treatment, abstract unpurified wastewater and return it to inaugural poaching wastewater to carry out circular process, and recycle purified water.

Description

A kind of chemical copper-plating rinsing waste-water treatment process

Technical field

The present invention relates to a kind of electroless copper treatment process, particularly relate to a kind of electroless copper waste water treatment process.

Background technology

Along with electroless copper technological direction maturation, chemical-copper-plating process has begun to be widely used in industrial circles such as processing of frosting EMI suppression and pcb board coating surface.And in this chemical-copper-plating process, wastewater produced in the rinsing workpiece process because of containing heavy metal Cu ²⁺, could reclaim or discharge after must handling.Although traditional chemical precipitation method can effectively be removed metal Cu in the waste water ²⁺Ion, but still can produce the heavy metal sewage sludge that needs professional treatment, adverse environment.

Summary of the invention

The object of the present invention is to provide a kind of chemical copper-plating rinsing waste-water treatment process, with the zero release of basic realization poaching wastewater.

The present invention adopts ion exchange method and reverse osmosis process combined, not only can reclaim most metallic copper resource, and does not have the generation of waste residue mud, enabling environment.

Its flow process of chemical copper-plating rinsing waste-water treatment process of the present invention is:

A. adjust pH value, the pH value of Electroless Copper Plating Rinse Water is adjusted into 3～10;

B. ion-exchange with the above-mentioned Electroless Copper Plating Rinse Water ion exchange resin of flowing through, makes that the same type ion exchanges in heavy metal ion in the waste water and the ion exchange resin, to reclaim the heavy metal in the waste water;

C. ultrafiltration, by a semi-permeable membranes to remove macromole impurity contained in the waste water;

D. reverse osmosis will purify and not purify liquid waste and separate by a reverse osmosis membrane;

E. water purification reuse/dense water cycle is handled, and the above-mentioned water purification that comes out through reverse osmosis membrane separation is recycled, and for the waste water that does not purify, then it is carried back the Electroless Copper Plating Rinse Water of beginning to handle again.

Use chemical copper-plating rinsing waste-water treatment process of the present invention, itself can become closed cycle its technology, can realize the zero release of poaching wastewater when reclaiming heavy metal basically, avoids it to cause environmental pollution.

Description of drawings

Fig. 1 is a schematic flow sheet of the present invention.

Embodiment

As shown in Figure 1, it is a schema of the present invention, can it is evident that by this figure, it is that Electroless Copper Plating Rinse Water is adjusted pH value 101 steps that the present invention begins, so that its pH value is adjusted to 3～10, carry out ion-exchange 102 steps then, utilize the ion exchange resin characteristic, make that the same type ion exchanges in heavy metal ion in the waste water and the ion exchange resin, to reclaim the heavy metal in the waste water, through a ultrafiltration 103 steps, to remove the macromole impurity that contains in its waste water, promptly pass through a reverse osmosis 104 steps at last again by a semi-permeable membranes, separate will purify with the waste water that does not purify, its water purification is recycled, almost detected existence in this water purification, and the waste water that will not purify is in addition handled 105 steps through a dense water cycle less than cupric ion, carry back in the undressed waste water of beginning, again handle, so circulation can be purified liquid waste, and can reach zero release substantially.

Claims (1)

1. chemical copper-plating rinsing waste-water treatment process, the step of this technology includes:

A. adjust pH value, the pH value of Electroless Copper Plating Rinse Water is adjusted into 3～10;

B. ion-exchange is characterized in that, utilizes the ion exchange resin characteristic, makes that the same type ion exchanges in heavy metal ion in the waste water and the ion exchange resin, to reclaim the heavy metal in the waste water;

C. ultrafiltration, by a semi-permeable membranes to remove macromole impurity contained in the waste water;

D. reverse osmosis, this step are will not purify with purifying liquid waste by a reverse osmosis membrane and separate;

E. water purification reuse/dense water cycle is handled, and the above-mentioned water purification that comes out through reverse osmosis membrane separation is recycled, and for the waste water that does not purify, then it is carried back the Electroless Copper Plating Rinse Water of beginning to handle again.