KR101965748B1 - Recycling method of waste abs resin coated chromium, nickel and copper - Google Patents

Abstract

The present invention relates to a method of recycling a waste ABS resin coated with chromium, nickel and copper. The method of the present invention comprises: a step (1) of crushing the waste ABS resin coated with chromium, nickel and copper to 10 to 50 mm to obtain a crushed waste ABS resin; a step (2) of dipping the crushed waste ABS resin in a diluted sulfuric acid solution to dissolve nickel and copper coated on the waste ABS resin; a step (3) of applying physical stirring and ultrasonic waves to the diluted sulfuric acid solution having the crushed waste ABS resin dipped therein in the step of dissolving nickel and copper in order to strip chromium particles coated on the waste ABS resin; a step (4) of separating a recycled ABS resin from the diluted sulfuric acid solution in which nickel and copper are dissolved, and stripped chromium particles are dispersed; and a step (5) of washing, dehydrating and drying the separated recycled ABS resin. According to the present invention, the method has effects of preventing environmental pollution and increasing recycling rate of resources to reduce costs by separating an ABS resin from the waste ABS resin coated with nickel and copper without deteriorating physical properties of the ABS resin and recycling the separated ABS resin; and has an effect of obtaining an excellent process efficiency by dissolving the coated nickel and copper through one process with diluted sulfuric acid, and enabling the coated chromium particles to be stripped.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recycling method of waste ABS resin plated with chromium, nickel and copper. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method of recycling waste ABS resin plated with chromium, nickel and copper, and more particularly, to a method of recycling waste ABS resin without deteriorating physical properties, and also recycling chromium, nickel and copper The present invention relates to a recycling method of chromium, nickel and copper-plated waste ABS resin.

Various wastes are generated in homes and industrial sites. In particular, in the case of composite wastes of synthetic resin and metal, for example, composite waste plated with metal in synthetic resin, there is a need to recycle both synthetic resin and metal through a proper separation process.

Wastes plated with metal on synthetic resin occur in various fields such as automobile parts, electronic products, toys and various accessories. In the past, such wastes can not be recycled, and they have been disposed of through landfill or incineration processes. In recent years, however, the prices of metals such as nickel and copper have surged, and various methods of recovering and recycling nickel and copper from wastes containing nickel or copper have been searched for variously. Korean Patent Publication No. 10-2000-0000311 A variety of recycling methods are described. However, since the conventional method recovers only the specific metallic powder plated on the synthetic resin, and in particular, there is no recovery method for the plated chrome, there is a problem that the chromium-plated synthetic resin component is difficult to be recycled, and the chromium-plated synthetic resin There is a problem that a large amount of secondary waste such as wastewater is generated in the process.

Particularly, thermoplastic resins such as ABS, ABS-PC which are plated with chromium, nickel and copper are easy to be made into specific shapes and used for various purposes, and have excellent thermal stability and mechanical strength. It is also widely used for home appliances and automotive finishing materials because it has excellent abrasion resistance without losing gloss.

However, such a metal film plated with a thermoplastic resin such as ABS or ABS-PC has a very good adhesion, and there are limitations in terms of energy efficiency and regeneration efficiency for pulverizing and separating the metal contained in the matrix by a mechanical method have. Therefore, the present technology is difficult to handle, and the efficiency of regeneration is low, so that the economical efficiency is not good. However, the use of thermoplastic resins such as ABS and ABS-PC has continued to increase in order to lighten the product. Above all, thermoplastics such as plated ABS and ABS-PC contain various rare metals, Technology is a necessary skill to raise the recycling rate of resources. In addition, the technology of recycling thermoplastic resins such as ABS and ABS-PC without deteriorating the physical properties of thermoplastic resins such as plated ABS and ABS-PC is a necessary technique for increasing the recycling rate of resources.

Korean Patent Laid-Open No. 10-2000-0000311 (Separation and Processing Method of Waste Wire and Waste Communication Cable)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide an ABS resin which is plated with nickel and copper, To provide a way to recycle waste plastics, such as chromium, nickel and copper plated ABS resins.

Another object of the present invention is to provide a process for producing a chromium-nickel-copper-plated waste ABS resin which is capable of dissolving nickel and copper plated by a single process using diluted sulfuric acid and peeling the plated chromium particles, To provide a method for recycling.

It is still another object of the present invention to provide a method for preparing a lithium secondary battery which comprises dissolving plated nickel and copper using diluted sulfuric acid having a concentration of 5 v / v% to 15 v / v%, and peeling the plated chrome particles to prevent deterioration of the physical properties of the recycled ABS resin Chromium, nickel and copper-plated waste ABS resin.

It is still another object of the present invention to provide a process for separating and leaching nickel and copper continuously through one-step and two-step pH control in one process, which is excellent in process efficiency and economical in chrome, nickel and copper And to provide a method for recycling waste ABS resin.

In order to accomplish the above object, the present invention provides a method for producing a molded article, comprising the steps of (1) crushing a waste ABS resin plated with chromium, nickel and copper to 10 to 50 mm; (2) dipping the waste ABS resin in a diluted sulfuric acid solution (3) dissolving the nickel and copper in the step of dissolving nickel and copper, and physically stirring and ultrasonic waves are applied to the diluted sulfuric acid solution containing the waste ABS resin, which is crushed in the step of dissolving the nickel and copper, to peel off the plated chrome particles 4) separating the dilute sulfuric acid solution in which the nickel and copper are dissolved and the separated chrome particles are dispersed and the regenerated ABS resin; and (5) washing, dehydrating and drying the separated regenerated ABS resin Chromium, nickel and copper plated waste ABS resin.

The method of recycling the chromium, nickel and copper-plated waste ABS resin of the present invention has the following effects.

First, the method of recycling the chromium, nickel and copper-plated waste ABS resin according to the present invention is to recycle waste ABS resin coated with nickel and copper without deteriorating physical properties, thereby preventing environmental pollution, It has the effect of reducing the cost.

Second, the method of recycling waste ABS resin plated with chromium, nickel and copper according to the present invention can dissolve nickel and copper plated in one process using dilute sulfuric acid and peel the plated chrome particles, Has excellent effect.

Thirdly, a method of recycling chromium, nickel and copper-plated waste ABS resin according to the present invention is to dissolve plated nickel and copper using dilute sulfuric acid having a concentration of 5 v / v% to 15 v / v% It has an effect of preventing deterioration of the physical properties of the recycled ABS resin by peeling off the particles.

Fourth, the method of recycling waste ABS resin plated with chromium, nickel and copper according to the present invention can separate and leach nickel and copper continuously through one step and two step pH adjustment in one process, Is excellent and has an economical effect.

1A is a view showing an example in which an ABS resin plated with chromium, nickel, and copper is used as household appliances such as automobiles, washing machines, and cosmetics containers.
1B is a view showing a process in which chromium, nickel and copper are plated on the ABS resin.
2 is a flow chart showing the sequence of a method for recycling chromium, nickel and copper plated waste ABS resin of the present invention.
3 is a flow chart showing the flow of a method for recycling chromium, nickel and copper plated waste ABS resin of the present invention.
4A is a view showing a waste ABS resin plated with chromium, nickel and copper.
FIG. 4B is a view showing a state in which the waste ABS resin plated with chromium, nickel, and copper is shattered.
4C is a view showing a diluted sulfuric acid solution in which nickel and copper are dissolved and the separated chromium particles are dispersed.
Figure 4d is a view showing filtered chrome particles.
4e is a view showing a dilute sulfuric acid solution in which nickel and copper are dissolved.
4f is a view showing mixed sludge of nickel and copper.
FIG. 4G is a view showing a regenerated ABS resin in which plated chromium is peeled off, plated nickel and copper are melted, separated and recycled.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of the term in order to describe its invention in the best way Accordingly, the present invention should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the specification of the present invention and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. It should be understood that various equivalents and modifications are possible or possible.

Hereinafter, prior to describing the present invention with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the details of known configurations that can be easily added by those skilled in the art, It should be noted that it is not specifically described.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing an example in which an ABS resin plated with chromium, nickel, and copper is used for household appliances such as automobiles, washing machines, and cosmetics containers.

Referring to FIG. 1, it can be seen that ABS resin plated with chromium, nickel and copper is used for various purposes such as automobiles, home appliances, household goods, and the like.

ABS resin is a copolymer composed of three components of acrylonitrile, butadiene, and styrene. It is a kind of an impact resistant thermoplastic resin, and the first letter of these three components is taken and generally abbreviated as ABS. This resin is a general engineering plastics that gives the merits of three characteristics of the resin, namely, gloss and formability of styrene, stiffness possessed by acrylonitrile, chemical resistance, excellent mechanical properties and impact resistance of butadiene.

Generally, the composition of A / B / S in ABS resin can be produced by infinitely changing theoretically, but it is practically necessary within the range of A / B / S = 20-30% / 5-40% / 30-75% . In addition, ABS resin is one of the biggest features that is the most easily plated material among all plastics. It is important to note that the excellent properties of ABS resin, such as styrene gloss, electrical properties and formability, but also the heat resistance, stiffness, oil resistance and weatherability of acrylonitrile, .

1B is a view showing a process in which chromium, nickel and copper are plated on the ABS resin.

Referring to FIG. 1B, a copper layer is first coated on the ABS by a copper sulfate plating process, a semi-glossy nickel plating process for preventing corrosion of a copper layer, a glossy nickel plating process for a chromium plating layer gloss assist, Chrome, nickel and copper are plated on ABS resin through a nickel plating process and a chrome plating process for brilliant appearance and abrasion resistance. As a result, as shown in FIG. 2B, the copper layer is first plated on the ABS, the nickel layer is plated thereon, and the chrome layer is plated on the outermost layer, thereby depositing three plating layers on the ABS resin in the order of copper-nickel-chromium .

division ingredient ratio(%) Remarks Base material ABS, PC-ABS About 78.0 Based on car grills
Plating component Chromium (Cr) About 4.0 Nickel (Ni) Approximately 9.0 Copper (Cu) Approximately 9.0

Table 1 shows the composition ratios of chromium, nickel, and copper plated ABS resins used in automotive grills.

2 is a flow chart showing the sequence of a method for recycling chromium, nickel and copper plated waste ABS resin of the present invention.

2, the method for recycling waste ABS resin coated with chromium, nickel and copper according to the present invention basically comprises the steps of (1) crushing waste ABS resin plated with chromium, nickel and copper to 10 to 50 mm; (2) (3) a step of physically stirring the diluted sulfuric acid solution containing the waste ABS resin crushed in the step of dissolving the nickel and copper, and (4) separating the dilute sulfuric acid solution in which the nickel and copper are dissolved and the exfoliated chromium particles are dispersed and the regenerated ABS resin, and (5) Washing the ABS resin, dehydrating and drying the ABS resin.

The step of crushing the waste ABS resin plated with chromium, nickel, and copper into 10 to 50 mm forms a crack in the plated layer, facilitating penetration of the dilute sulfuric acid solution thereafter, thereby facilitating the dissolution of the plated nickel and copper I have. Furthermore, the step of crushing the plated waste ABS resin to 10 to 50 mm has an effect of facilitating the peeling of the plated chrome particles. When the size of the waste ABS resin is less than 10 mm, cracks are formed excessively and the property of the ABS due to the diluted sulfuric acid may be lowered. If the waste ABS resin size exceeds 50 mm, There is a problem that dissolution of the plated nickel and copper does not sufficiently occur due to difficulty in penetration of the solution, and dissolution of the plated nickel and copper serving as the adhesive layer does not sufficiently occur, thereby causing difficulty in peeling of the plated chromium particles .

The reason why dilute sulfuric acid is used in the step of dissolving plated nickel and copper by immersing the crushed waste ABS resin in a dilute sulfuric acid solution is that when nitric acid is used, wastewater in the form containing NO _x ions, which is resistant to decomposition after nickel and copper leaching Which may cause problems in the treatment of wastewater. In addition, hydrochloric acid has a problem in that it is difficult to handle due to its light specific gravity compared with sulfuric acid. In the case of sulfuric acid, as described below, it has an advantage of not causing deterioration of the physical properties of ABS resin. Therefore, The plated nickel and copper were dissolved.

Generally, chromium is not dissolved in dilute sulfuric acid solution, but when chromium and copper dissolve on ABS resin, which acts as an adhesive layer, chromium particles lose adhesion with ABS resin in principle. Physical agitation and ultrasonic waves are applied to peel off the chromium particles. If physical agitation and ultrasonic wave are not applied, there may be a problem that the plated chrome particles are not sufficiently peeled off. Examples of physical stirring include mechanical stirring and air blowers.

 The step of dissolving nickel and copper is preferably carried out at a temperature of 40 ° C to 60 ° C. If the temperature is less than 40 캜, the plated nickel and copper may not sufficiently dissolve and the plated chrome particles may be difficult to peel off. If the temperature exceeds 60 캜, the property of the ABS due to diluted sulfuric acid may be deteriorated Can occur.

The step of peeling the chromium particles is preferably performed using an ultrasonic wave having a frequency of 50 KHz to 200 KHz. If the frequency of the ultrasonic waves is less than 50 KHz, there may occur a problem that the plated chrome particles do not sufficiently peel off. If the frequency of the ultrasonic waves exceeds 200 KHz, the size of the separated chrome particles becomes excessively small, have.

Thereafter, the diluted sulfuric acid solution in which the nickel and copper are dissolved and the separated chrome particles are dispersed is separated from the regenerated ABS resin. The separated regenerated ABS resin is transferred to the washing tank, and the residual diluted sulfuric acid solution is washed, dehydrated and dried to complete the regenerated ABS resin.

Since the diluted chromium particles are dispersed in the diluted sulfuric acid solution separated in the step of separating the reclaimed ABS resin, it is necessary to add a step of filtering the dispersed chromium particles. A micro-housing filter filter is generally used to filter the peeled chrome particles from the diluted sulfuric acid solution. The filtered chrome particles can be recycled by washing the remaining diluted sulfuric acid solution and dehydrating it and drying it.

When the chromium particles are filtered, only nickel and copper are dissolved in the diluted sulfuric acid solution. When the dilute sulfuric acid solution is neutralized with an alkali agent, the dissolved nickel and copper are leached into the hydroxide. In this case, the leached nickel and copper can be recycled by washing the remaining diluted sulfuric acid solution, dehydrating it and drying it. None of the cases alkaline agents include caustic soda (NaOH), sodium carbonate (NaCO ₃₎ and ammonia (NH ₃₎ which has one or may be used in, caustic soda (NaOH), sodium carbonate (NaCO ₃₎ and ammonia (NH ₃₎ one Can be mixed and used as an alkaline agent.

If it is necessary to separate nickel and copper, use a dilute sulfuric acid solution in which nickel and copper are dissolved in one step using an alkaline agent. The nickel is first leached by adjusting pH to pH 6.5. The separated nickel can be recycled by washing the remaining diluted sulfuric acid solution, dehydrating it and drying it. When nickel is leached and separated, only copper is dissolved in the diluted sulfuric acid solution. In this case, dilute sulfuric acid solution in which only copper is dissolved in two stages is changed to pH 6.6 to pH 7.5 using an alkaline agent, and copper leaching is started. The leached copper is separated from the dilute sulfuric acid solution, and the diluted sulfuric acid solution remaining in the separated copper is washed, dehydrated and dried to recycle the copper.

Dilute sulfuric acid preferably has a concentration of 5 v / v% to 15 v / v%. When the amount of dilute sulfuric acid is less than 5 v / v%, the plated nickel and copper do not sufficiently dissolve, and the plated nickel and copper serving as the adhesive layer are not sufficiently dissolved so that the plated chrome particles are difficult to peel off Lt; / RTI > If the diluted sulfuric acid exceeds 15 v / v%, the property of ABS due to dilute sulfuric acid may be lowered.

It is preferable that the amount of sulfuric acid added has a mass ratio of 1.5 to 2.0 based on the plated nickel and copper mass. When the amount of sulfuric acid to be added is less than 1.5 parts by mass of plated nickel and copper mass, the plated nickel and copper do not sufficiently dissolve and the plated nickel and copper serving as the adhesive layer do not sufficiently dissolve, The problem of difficulty in peeling the chromium particles may occur. If the amount of sulfuric acid added exceeds the mass of 2.0% of the plated nickel and copper mass, there is a risk that the properties of the ABS due to excess sulfuric acid may be lowered.

In some cases, the diluted sulfuric acid solution may additionally contain hydrogen peroxide in a ratio of 0.25 to 0.35 based on the weight of the sulfuric acid introduced. Hydrogen peroxide (H ₂ O ₂ ) is added to increase the oxidizing power of dilute sulfuric acid. If the mass of hydrogen peroxide is less than 0.25 as compared with the weight of the sulfuric acid introduced, the increase in the oxidizing power of the dilute sulfuric acid solution is insufficient and the dissolution of the plated nickel and copper is sufficient And when the mass of hydrogen peroxide is more than 0.35 relative to the weight of the sulfuric acid added, there is a risk that the oxidizing power of the dilute sulfuric acid solution is excessively increased and the physical properties of the ABS may be lowered have.

3 is a flow chart showing the flow of a method for recycling chromium, nickel and copper plated waste ABS resin of the present invention.

According to FIG. 3, chromium, nickel and copper-plated waste ABS resin used in household appliances or automobiles is subjected to a crushing process which is a pre-treatment. The scrapped scrap is put into a diluted sulfuric acid solution in a peeling tank, and stirred and sonicated. Thereafter, the recycled ABS resin and the peeled chrome particles are separated through a separation and a filtration process. Nickel and copper are leached when the filtrate (dilute sulfuric acid solution) in which nickel and copper are dissolved is neutralized with an alkali agent, and the leached nickel and copper are filtered, washed, dried and recycled.

4A is a view showing a waste ABS resin plated with chromium, nickel and copper. FIG. 4B is a view showing a state in which the waste ABS resin plated with chromium, nickel, and copper is shattered. 4C is a view showing a diluted sulfuric acid solution in which nickel and copper are dissolved and the separated chromium particles are dispersed. Figure 4d is a view showing filtered chrome particles. 4e is a view showing a dilute sulfuric acid solution in which nickel and copper are dissolved. 4f is a view showing mixed sludge of nickel and copper. FIG. 4G is a view showing a regenerated ABS resin in which plated chromium is peeled off, plated nickel and copper are melted, separated and recycled.

4A to 4G, the waste ABS resin coated with chromium, nickel, and copper is subjected to a crushing process, which is a pretreatment, and the crushed plated scrap is put into a diluted sulfuric acid solution in a peeling tank. When stirring and ultrasonic wave are applied, Nickel and copper are dissolved in a dilute sulfuric acid solution. Then, the regenerated ABS resin and the separated chrome particles are separated through a filtration process, and the dilute sulfuric acid solution in which nickel and copper are dissolved is neutralized and titrated with an alkali agent, whereby nickel and copper are leached, and a recycled ABS resin, Nickel and copper mixed sludge are separated and recycled. Particularly, according to FIG. 4C, the dilute sulfuric acid solution in which nickel and copper are dissolved and the separated chrome particles are dispersed shows a cloudy liquid state due to the dispersed chrome particles. According to FIG. 4e, the dispersed chrome particles are filtered, It can be seen that the diluted sulfuric acid solution in which only copper is dissolved shows a clear liquid state.

[Example]

end. Shredding

Plated waste synthetic resin (ABS resin) used in automobiles, household appliances, household goods, etc. is irregular and large in size, so it is crushed to a size of 10 ~ 50mm before the input of the raw material. This is advantageous in that cracking occurs in the plating when crushing is performed, so that the penetration of the peeling solution is facilitated and the process time can be shortened.

I. Plating peeling

- exfoliation liquid

① Sulfuric acid (H ₂ SO ₄ ): 15 v / v%

※ removing solution is available when a selection of sulfuric acid, hydrochloric acid, nitric acid, but nitric acid is used the filtrate after nickel, copper leaching recalcitrant the NO _X Containing ions And hydrochloric acid is more dangerous than sulfuric acid and nitric acid due to its light nature. H 2 SO 4 was selectively used and hydrogen peroxide was added to increase sulfuric acid oxidation ability.

② Hydrogen peroxide (H ₂ O ₂ ): It is added at a ratio of 7: 3 to the amount of sulfuric acid.

(3) The amount of sulfuric acid should be 1.5 to 2.0 times the amount of nickel and copper plated.

- peeling process

Plated waste synthetic resin (ABS resin) pulverized at 10 to 50 mm is put into a peeling tank containing the solution and stirred. At this time, stirring can be performed by selecting one of mechanical stirring using an agitator and physical stirring using an air blower. Applying ultrasonic wave at 50Khz ~ 200Khz, 100W ~ 1,000W output can accelerate the peeling reaction. The temperature can be kept at room temperature or 40 to 60 ° C. The stripping solution is initially charged with sulfuric acid at a ratio of 1.5 to 2.0 based on the nickel and copper content, and after 4 to 8 hours, hydrogen peroxide is added at a rate of 30% of the sulfuric acid input.

division Peeling liquid concentration Test temperature
(° C) The tensile strength
(kgf / cm ² ) Flexural strength
(kgf / cm ² ) Impact strength
(kg · cm / cm) importance
(g / cm ³⁾ Elongation
(%) Flexural modulus
(kgf / cm ² ) ISO
(For plating) 23 397.69 632.22 33.00 1.04 25.00 21414.0 ABS before playback 23 430.55 710.87 27.81 1.05 39.88 22425.6 ABS after playback
Sulfuric acid 5v / v% 23 430.23 710.97 27.74 1.05 39.62 22352.9 Sulfuric acid 10 v / v% 23 430.24 703.22 27.43 1.05 39.02 22231.4 Sulfuric acid 15v / v% 23 412.75 697.47 23.56 1.05 33.59 20891.4 Sulfuric acid 20v / v% 23 385.46 677.12 18.32 1.05 29.21 18234.5

Table 2 shows the change in properties of reclaimed ABS after peeling depending on the concentration of dilute sulfuric acid solution.

The test specimens used in the tests in Table 2 used plated ABS for washing machine appliances. Test results showed that the physical properties of the solution with dilute sulfuric acid solution concentration exceeding 15v / v% were obvious. Especially, the values of impact strength, flexural strength and flexural modulus were significantly lowered from diluted sulfuric acid solution concentration of 15v / v%. From the above results, it is preferable that the concentration of the exfoliating liquid (dilute sulfuric acid solution concentration) is controlled to 15 v / v% or less in order to maintain stiffness of ABS after regeneration.

All. Regeneration ABS separation

And separating the ABS and the plating stripping solution dissolved in the sulfuric acid solution in the stripping tank. The peeled ABS is transferred to the washing tank through the screw conveying device connected to the peeling tank to wash the sulfuric acid solution remaining in the ABS, and the washed ABS is dehydrated and dried through the screw conveying device connected to the washing tank, .

la. percolation

After peeling, the nickel and copper dissolved in the sulfuric acid solution and the chromium separated in the particle state are filtered. Filtration uses a micro-housing filter filter.

hemp. Nickel, copper leaching

The chromium-free filtrate is neutralized with an alkaline agent to titrate nickel and copper into hydroxides. The alkaline agent used may be at least one of caustic soda (NaOH), sodium carbonate (NaCO ₃ ) and ammonia (NH ₃ ). The pH range in which nickel and copper are leached from the viewpoint of pH, can do. The nickel precipitate was filtered and dewatered by using a filter press, and the primary dehydration filtrate was neutralized to pH 6.6 to 7.5 by two steps to leach out the copper .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is possible. Accordingly, it is intended that the scope of the invention be defined by the claims appended hereto, and that all equivalent or equivalent variations thereof fall within the scope of the present invention.

Claims (9)

(1) crushing chromium, nickel and copper plated waste ABS resin to 10 to 50 mm;
(2) dissolving the plated nickel and copper by immersing the pulverized waste ABS resin in a dilute sulfuric acid solution;
(3) separating the plated chromium particles by physically stirring and applying ultrasonic waves to the dilute sulfuric acid solution containing the waste ABS resin crushed in the step of dissolving the nickel and copper;
(4) separating the dilute sulfuric acid solution in which the nickel and copper are dissolved and the separated chrome particles are dispersed, and the regenerated ABS resin; And
(5) washing, dehydrating and drying the separated recycled ABS resin;
And recycled chromium, nickel and copper plated waste ABS resin.
The method according to claim 1,
Wherein the step of dissolving the nickel and copper is performed at a temperature of 40 ° C to 60 ° C and the step of peeling the chromium particles is performed using ultrasound with a frequency of 50KHz to 200Khz. How to recycle resin.
3. The method of claim 2,
Wherein the step of separating the recycled ABS resin further comprises the step of filtering the chrome particles in the diluted sulfuric acid solution in which the separated chrome particles are dispersed. How to.
The method of claim 3,
Wherein the step of filtering the chromium particles further comprises neutralizing and titrating the dilute sulfuric acid solution in which nickel and copper are dissolved with an alkali agent to thereby leach nickel and copper into hydroxide. A method for recycling a plated waste ABS resin.
5. The method of claim 4,
The alkaline agent is sodium hydroxide (NaOH), sodium carbonate (NaCO ₃₎ and ammonia (NH ₃₎ how to recycle chromium, nickel and copper plating the waste ABS resin, characterized in that at least any one selected from the.
5. The method of claim 4,
The dilute sulfuric acid solution in which nickel and copper are dissolved in one step by using the alkali agent is adjusted to pH 6.0 to pH 6.5, and the nickel is leached to separate. The dilute sulfuric acid solution in which copper is dissolved in two steps is adjusted to pH 6.6 nickel and copper-plated waste ABS resin, characterized in that copper is leached out at a pH of 7.5.
7. The method according to any one of claims 1 to 6,
Wherein said diluted sulfuric acid solution has a concentration of 5 v / v% to 15 v / v%.
8. The method of claim 7,
Wherein the diluted sulfuric acid solution comprises sulfuric acid having a ratio of plated nickel and copper in a ratio of 1.5 to 2.0 relative to the weight of the plated nickel and copper.
9. The method of claim 8,
Wherein the dilute sulfuric acid solution further comprises hydrogen peroxide in a ratio of 0.25 to 0.35 based on the weight of the sulfuric acid.

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