Method for accelerating metal dissolution through alcohol-hydrogen peroxide

Abstract

The invention discloses a method for accelerating metal dissolution through alcohol-hydrogen peroxide, and belongs to the technical field of metal recovery technologies. The method comprises the following steps: (1) mixing a liquid alcohol compound with at least one of acetyl halide and oxalyl halide to obtain a mixed solution; (2) dispersing a material containing metal to be dissolved into the mixed solution obtained in the step (1) to obtain a mixture, and placing the mixture in a closed space; and (3) hydrogen peroxide is introduced into the mixture obtained in the step (2) to dissolve the metal. Through the method, efficient, simple, convenient and environment-friendly dissolution of various metals can be realized, so that the metal dissolution efficiency is improved, the metal recovery efficiency is improved, and the metal recovery complexity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of metal recovery and relates to a method for accelerating metal dissolution by using alcohol-hydrogen peroxide. Background Art

[0002] Metal generally refers to a class of substances that have a unique luster and are opaque, ductile, and have thermal and electrical conductivity. Most metals are excellent conductors of electricity and heat, have high density and high melting point. They are extremely common in life and are a very important and most widely used class of substances in modern industry.

[0003] Since most metals have application value and some metal emissions can cause environmental pollution and other problems, it is usually necessary to recycle the metals in the materials and then reuse or otherwise process the recycled metals.

[0004] Hydrometallurgy is one of the mainstream technologies for metal recovery. Hydrometallurgy is to place the pre-treated waste metal enrichment in a water-soluble medium such as nitric acid, aqua regia, cyanide, thiourea, thiosulfate, etc., and transfer the metal into the liquid phase through dissolution or chemical reaction, and then enrich and separate the metal in the liquid phase through adsorption, extraction, precipitation, ion exchange and electrolysis, so that the metal can be recovered in the form of a single substance or compound. Therefore, dissolving the metal is of great significance, and the efficiency of dissolution directly affects the metal recovery efficiency. At the same time, the richness of the objects that can be dissolved by the water-soluble medium directly affects the complexity of the metal recovery process. The richer the objects that can be dissolved by the water-soluble medium, the lower the complexity of the metal recovery process and the better the performance of the water-soluble medium.

[0005] Precious metals mainly refer to eight metal elements, including gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum). Precious metals are a type of metal with stable chemical properties, are difficult to corrode, have great resistance to chemicals, and are not easy to cause chemical reactions under normal conditions. Although precious metals have a wide range of industrial uses, they are difficult to recycle. Water-soluble media that are usually suitable for dissolving ordinary metals cannot produce a good dissolving effect on precious metals or even cannot dissolve precious metals.

[0006] Therefore, it is necessary to provide a method for accelerating metal dissolution by alcohol-hydrogen peroxide, further enrich the types of soluble metals, and at the same time improve the metal dissolution efficiency, thereby improving the metal recovery efficiency and reducing the complexity of the metal recovery process. Summary of the invention

[0007] In order to overcome the problems in the background technology, the present invention dissolves metals by a more efficient, simple, convenient, environmentally friendly and applicable method to improve the metal recovery efficiency and reduce the complexity of the metal recovery process. The present invention uses hydrogen peroxide as an oxidant to oxidize acetyl halide or oxalyl halide to produce atomic bromine and chlorine in a mixed system of liquid alcohol compounds, acetyl halide and oxalyl halide, thereby achieving rapid dissolution of multiple metals. Hydrogen peroxide decomposes into water and oxygen at room temperature, and the alcohol liquid compound can be reused repeatedly, which is almost harmless to the environment.

[0008] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0009] The method comprises the following steps:

[0010] (1) introducing hydrogen peroxide into a liquid alcohol compound to prepare an alcohol-hydrogen peroxide solution;

[0011] (2) adding at least one of acetyl halide and oxalyl halide to the alcohol-hydrogen peroxide solution obtained in step (1) to prepare a dissolving solution;

[0012] (3) Adding a material containing the metal to be dissolved into the solution obtained in step (2) to dissolve the metal.

[0013] Preferably, the metal to be dissolved includes at least one of a precious metal or a common metal.

[0014] Preferably, the precious metal includes at least one of gold, silver, platinum, palladium and rhodium, and the common metal includes at least one of iron, manganese, titanium, chromium, zinc, tin, lead, aluminum, copper and nickel.

[0015] Preferably, the liquid alcohol compound includes at least one of methanol, ethanol, propanol, n-butanol, n-pentanol, hexanol, octanol, ethylene glycol, 1,2-propylene glycol, glycerol, tert-butanol, 1,4-butanediol, isopentanol and isopropanol.

[0016] Preferably, the acetyl halide is at least one of acetyl bromide and acetyl chloride, and the oxalyl halide is at least one of oxalyl bromide and oxalyl chloride.

[0017] Preferably, the total amount of acetyl halide and oxalyl halide used is 0.5-3 ml.

[0018] Preferably, the amount of hydrogen peroxide used is 0.5 to 5 ml.

[0019] Preferably, in step (3), the dissolved liquid is stirred at a stirring speed of 400 to 2000 r / min.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention adds a small amount of at least one of acetyl halide or oxalyl halide to a liquid alcohol solvent, and then adds a trace amount of hydrogen peroxide. Under the action of hydrogen peroxide, acetyl halide and oxalyl halide can generate strong oxidizing halogen atoms in situ, which can oxidize metals and increase the dissolution rate of metals.

[0022] 2. The present invention can dissolve a variety of metals relatively quickly, not only with high dissolution efficiency, but also with rich dissolution objects and excellent applicability, which can effectively simplify the metal recovery process.

[0023] 3. The present invention further improves the metal dissolution efficiency through stirring and compounding.

[0024] 4. The method of the present invention is green and low in energy consumption. The liquid alcohol solvent involved can be recovered and reused by a rotary evaporator. The final products of hydrogen peroxide are water and oxygen, which are harmless to the environment and can recover metals at low cost and high efficiency.

[0025] 5. The method of the present invention has high recovery efficiency and can complete the reaction in a relatively short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The metal dissolution time diagram in Examples 1-5 of the present invention;

[0027] Figure 2 The metal dissolution time diagram in Examples 6-10 of the present invention;

[0028] Figure 3 The metal dissolution time diagram in Examples 11-24 of the present invention;

[0029] Figure 4 This is the actual change process of the metal gold in the CPU dissolved in Example 1 of the present invention, wherein (a) is the CPU before dissolution, (b) is the CPU after dissolution for 40 minutes, (c) is the CPU after dissolution for 80 minutes, (d) is the CPU after dissolution for 160 minutes, (e) is the CPU after dissolution for 240 minutes, and (f) is the CPU after dissolution is completed. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the described contents.

[0031] Example 1

[0032] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0033] (2) Add 0.5 ml of acetyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0034] (3) The CPU is placed in a dissolving solution, and the dissolving solution is stirred at 2000 rpm using a magnetic stirrer. After reacting for 6.0 hours, all the gold in the CPU is dissolved out.

[0035] Example 2

[0036] This example adopts the same method as Example 1 to dissolve the gold in the CPU, except that: in this example, the amount of acetyl chloride added is 1 ml, the stirring speed is 800 rpm, and the gold is completely dissolved after 4.3 hours of reaction.

[0037] Example 3

[0038] This example adopts the same method as Example 1 to dissolve the gold in the CPU, except that: in this example, the amount of acetyl chloride added is 1.5 ml, the stirring speed is 1000 rpm, and the gold is completely dissolved after 5.3 hours of reaction.

[0039] Example 4

[0040] This example adopts the same method as Example 1 to dissolve the gold in the CPU, except that: in this example, the amount of acetyl chloride added is 2.0 ml, and the stirring speed is 1500 rpm. After 4 hours of reaction, all the gold is dissolved.

[0041] Example 5

[0042] This example adopts the same method as Example 1 to dissolve the gold in the CPU, except that in this example, 2.5 ml of acetyl chloride is added, and stirring is not performed. After 17.6 hours of reaction, all the gold is dissolved.

[0043] In Examples 1-5, the dissolution time of metallic gold is as follows Figure 1 As shown, through Figure 1 It can be seen that when other conditions remain unchanged, as the amount of acetyl chloride increases, the dissolution time of gold fluctuates, and then increases significantly at 2.5 ml, indicating that the amount of acetyl halide cannot be too large.

[0044] Example 6

[0045] In this example, 0.5 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0046] (2) Add 2.0 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0047] (3) The CPU is placed in a dissolving solution and stirred with a magnetic stirrer at 800 rpm. After 24 hours of reaction, all the gold in the CPU is dissolved out.

[0048] Example 7

[0049] This example adopts the same method as Example 6 to dissolve the gold in the CPU, except that the amount of hydrogen peroxide added in this example is 1.0 ml. After 6 hours of reaction, all the gold is dissolved.

[0050] Example 8

[0051] This example adopts the same method as Example 6 to dissolve the gold in the CPU, except that the amount of hydrogen peroxide added in this example is 1.5 ml. After 7 hours of reaction, all the gold is dissolved.

[0052] Example 9

[0053] This example adopts the same method as that of Example 6 to dissolve the gold in the CPU, except that the amount of hydrogen peroxide added in this example is 2.0 ml. After 4 hours of reaction, all the gold is dissolved.

[0054] Example 10

[0055] This example adopts the same method as Example 6 to dissolve the gold in the CPU, except that the amount of hydrogen peroxide added in this example is 2.5 ml. After 4 hours of reaction, all the gold is dissolved.

[0056] In Examples 6-10, the dissolution time of metallic gold is as follows Figure 2 As shown, through Figure 2 It can be seen that, under the condition that other conditions remain unchanged, with the increase of hydrogen peroxide dosage, the metal dissolution rate increases and tends to be stable at 2.5 ml. Considering factors such as economy, the dosage range of hydrogen peroxide in the present invention is more reasonable.

[0057] Embodiment 11

[0058] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of methanol to prepare an alcohol-hydrogen peroxide solution.

[0059] (2) Add 1.5 ml of acetyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0060] (3) The CPU is placed in a dissolving solution and stirred with a magnetic stirrer at 800 rpm. After 5 hours of reaction, all the gold in the CPU is dissolved out.

[0061] Example 12

[0062] This embodiment adopts the same method as that of embodiment 11 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is ethanol. After 7 hours of reaction, all the gold is dissolved.

[0063] Embodiment 13

[0064] This example adopts the same method as Example 11 to dissolve the gold in the CPU, except that the liquid alcohol compound in this example is propanol. After 7.5 hours of reaction, all the gold is dissolved.

[0065] Embodiment 14

[0066] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of n-butanol to prepare an alcohol-hydrogen peroxide solution.

[0067] (2) Add 1.5 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0068] (3) The CPU was placed in a dissolving solution, and the dissolving solution was stirred at 800 rpm using a magnetic stirrer. After 8.7 hours of reaction, all the gold in the CPU was dissolved out.

[0069] Embodiment 15

[0070] This embodiment adopts the same method as that of embodiment 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is n-pentanol. After 11 hours of reaction, all the gold is dissolved.

[0071] Example 16

[0072] This example adopts the same method as Example 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this example is hexanol. After 13.5 hours of reaction, all the gold is dissolved.

[0073] Embodiment 17

[0074] This embodiment adopts the same method as that of embodiment 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is octanol. After 14 hours of reaction, all the gold is dissolved out.

[0075] Embodiment 18

[0076] This embodiment adopts the same method as that of embodiment 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is ethylene glycol. After 21 hours of reaction, all the gold is dissolved out.

[0077] Embodiment 19

[0078] This example adopts the same method as Example 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this example is 1,2-propylene glycol. After 23.5 hours of reaction, all the gold is dissolved.

[0079] Embodiment 20

[0080] This embodiment adopts the same method as that of embodiment 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is glycerol. After 40 hours of reaction, all the gold is dissolved out.

[0081] Embodiment 21

[0082] This embodiment adopts the same method as that of embodiment 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is tert-butyl alcohol. After 11 hours of reaction, all the gold is dissolved.

[0083] Embodiment 22

[0084] This example adopts the same method as Example 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this example is 1,4-butanediol and the amount of acetyl bromide used is 3 ml. After 32 hours of reaction, all the gold is dissolved.

[0085] Embodiment 23

[0086] This example adopts the same method as that of Example 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this example is isoamyl alcohol. After 13 hours of reaction, all the gold is dissolved out.

[0087] Embodiment 24

[0088] This embodiment adopts the same method as that of embodiment 14 to dissolve the gold in the CPU, except that the liquid alcohol compound in this embodiment is isopropanol. After 10 hours of reaction, all the gold is dissolved out.

[0089] In Examples 11-24, the dissolution time of metallic gold is as follows Figure 3 As shown, through Figure 3 It can be seen that although different liquid alcohol compounds have a certain effect on the dissolution rate of metallic gold, the present invention can dissolve metallic gold by using liquid alcohol compounds as solvents, and the amount of liquid alcohol compounds used as solvents only needs to be determined according to the volume of the material containing the metal to be dissolved, as long as the material containing the metal to be dissolved can be completely immersed in the solvent.

[0090] Embodiment 25

[0091] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of methanol to prepare an alcohol-hydrogen peroxide solution.

[0092] (2) Add 2 ml of acetyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0093] (3) The waste photovoltaic panels are placed in a dissolving solution without stirring the dissolving solution. After 3 hours of reaction, all the precious metal silver in the waste photovoltaic panels is dissolved out.

[0094] Embodiment 26

[0095] This example adopts the same method as Example 25 to dissolve the silver in the waste photovoltaic panels, except that the liquid alcohol compound in this example is ethanol and the amount of hydrogen peroxide used is 1 ml. After 4 hours of reaction, all the silver is dissolved. No silver is detected by ICP-MS, indicating that the silver is completely precipitated.

[0096] Embodiment 27

[0097] In this example, 5 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0098] (2) Add 2 ml of acetyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0099] (3) 0.021 g of platinum sheet was placed in the solution, and the solution was stirred at 400 rpm using a magnetic stirrer. After 9 hours of reaction, the platinum sheet was completely dissolved.

[0100] Embodiment 28

[0101] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0102] (2) Add 2 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0103] (3) 0.028 g of palladium powder was placed in the solution, and the solution was stirred at 400 rpm using a magnetic stirrer. After reacting for 8.5 hours, all the palladium was dissolved.

[0104] Embodiment 29

[0105] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0106] (2) Add 1 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0107] (3) 0.013 g of ruthenium powder was placed in the solution, and the solution was stirred at 400 rpm using a magnetic stirrer. After reacting for 7 hours, all the ruthenium was dissolved.

[0108] Embodiment 30

[0109] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0110] (2) Add 2 ml of oxalyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0111] (3) 0.015 g of rhodium powder was placed in the solution, and the solution was stirred at 400 rpm using a magnetic stirrer. After reacting for 7 hours, all the rhodium was dissolved.

[0112] Embodiment 31

[0113] In this example, 5 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0114] (2) Add 3 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0115] (3) 0.0589 g of copper flakes were placed in the solution, and the solution was stirred at 400 rpm using a magnetic stirrer. After 8 minutes of reaction, all the copper was dissolved.

[0116] Embodiment 32

[0117] In this example, 5 ml of hydrogen peroxide was introduced into 100 ml of methanol to prepare an alcohol-hydrogen peroxide solution.

[0118] (2) Add 2 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0119] (3) 0.075 g of zinc flakes were placed in the solution, and the solution was stirred at 500 rpm using a magnetic stirrer. After 16 hours of reaction, all the zinc was dissolved.

[0120] Embodiment 33

[0121] In this example, 4 ml of hydrogen peroxide was introduced into 100 ml of n-butanol to prepare an alcohol-hydrogen peroxide solution.

[0122] (2) Add 5 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0123] (3) 0.0474 g of solder wire was placed in the solution, and the solution was stirred at 800 rpm using a magnetic stirrer. After 20 hours of reaction, all the tin was dissolved.

[0124] Embodiment 34

[0125] In this example, 5 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0126] (2) Add 3 ml of acetyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0127] (3) 0.0821 g of iron flakes were placed in the solution, and the solution was stirred at 800 rpm using a magnetic stirrer. After 21 h of reaction, all the iron was dissolved.

[0128] Embodiment 35

[0129] In this embodiment, 4 ml of hydrogen peroxide was introduced into 100 ml of a mixed liquid of methanol and ethanol to prepare an alcohol-hydrogen peroxide solution.

[0130] (2) Add 3 ml of acetyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0131] (3) 0.063 g of aluminum flakes were placed in the solution, and the solution was stirred at 500 rpm using a magnetic stirrer. After 19 hours of reaction, all the aluminum was dissolved.

[0132] Embodiment 36

[0133] In this example, 4 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0134] (2) Add 3 ml of oxalyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0135] (3) 0.058 g of nickel powder was placed in the solution, and the solution was stirred at 500 rpm using a magnetic stirrer. After 10 hours of reaction, all the nickel was dissolved.

[0136] Embodiment 37

[0137] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of isoamyl alcohol to prepare an alcohol-hydrogen peroxide solution.

[0138] (2) Add 0.5 ml of acetyl bromide and 1 ml of acetyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0139] (3) The memory stick is placed in the dissolving solution, and the dissolving solution is stirred at 800 rpm using a magnetic stirrer. After 11 hours of reaction, all the gold in the memory stick is dissolved out.

[0140] Embodiment 38

[0141] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of isoamyl alcohol to prepare an alcohol-hydrogen peroxide solution.

[0142] (2) Add 0.5 ml of oxalyl chloride and 1 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0143] (3) The memory stick is placed in the dissolving solution, and the dissolving solution is stirred at 800 rpm using a magnetic stirrer. After 11 hours of reaction, all the gold in the memory stick is dissolved out.

[0144] Embodiment 39

[0145] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of tert-butyl alcohol to prepare an alcohol-hydrogen peroxide solution.

[0146] (2) Add 0.5 ml of acetyl bromide, 0.5 ml of acetyl chloride and 0.5 ml of oxalyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0147] (3) The memory stick is placed in the dissolving solution, and the dissolving solution is stirred at 800 rpm using a magnetic stirrer. After 11 hours of reaction, all the gold in the memory stick is dissolved out.

[0148] Embodiment 40

[0149] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of 1,4-butanediol to prepare an alcohol-hydrogen peroxide solution.

[0150] (2) Add 0.5 ml of acetyl bromide, 0.3 ml of acetyl chloride, 0.5 ml of oxalyl chloride, and 0.2 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0151] (3) The memory stick is placed in the dissolving solution, and the dissolving solution is stirred at 800 rpm using a magnetic stirrer. After 32 hours of reaction, all the gold in the memory stick is dissolved out.

[0152] Embodiment 41

[0153] In this example, 2.5 ml of hydrogen peroxide was introduced into 100 ml of glycerol to prepare an alcohol-hydrogen peroxide solution.

[0154] (2) Add 0.5 ml of acetyl bromide, 1 ml of acetyl chloride, 1 ml of oxalyl chloride, and 0.5 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0155] (3) The memory stick is placed in a dissolving solution, and the dissolving solution is stirred at 800 rpm using a magnetic stirrer. After 40 hours of reaction, all the gold in the memory stick is dissolved out.

[0156] Embodiment 42

[0157] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0158] (2) Add 0.5 ml of acetyl chloride, 0.5 ml of oxalyl chloride and 1 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0159] (3) The memory stick is placed in the dissolving solution, and the dissolving solution is stirred at 1000 rpm using a magnetic stirrer. After 10.5 hours of reaction, all the gold in the memory stick is dissolved out.

[0160] Embodiment 43

[0161] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0162] (2) Add 0.5 ml of acetyl bromide, 1 ml of oxalyl chloride, and 0.5 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0163] (3) The memory stick is placed in the dissolving solution, and the dissolving solution is stirred at 1000 rpm using a magnetic stirrer. After 13 hours of reaction, all the gold in the memory stick is dissolved out.

[0164] Embodiment 44

[0165] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0166] (2) Add 2 ml of oxalyl chloride to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0167] (3) Place the CPU in the solution and stir the solution at 1000 rpm using a magnetic stirrer. After 16 hours of reaction, all the gold in the memory stick is dissolved out.

[0168] Embodiment 45

[0169] In this example, 3 ml of hydrogen peroxide was introduced into 100 ml of ethanol to prepare an alcohol-hydrogen peroxide solution.

[0170] (2) Add 2 ml of oxalyl bromide to the alcohol-hydrogen peroxide solution to prepare a dissolving solution.

[0171] (3) Place the CPU in the solution and stir the solution with a magnetic stirrer at 1000 rpm. After 12.5 hours of reaction, all the gold in the memory stick is dissolved out.

[0172] In summary, the method of the present invention can dissolve a variety of metals in a relatively short time, has high dissolution efficiency, a wide range of dissolving objects, and excellent applicability. By dissolving metals by the method, the metal recovery efficiency can be effectively improved, and the complexity of metal recovery can be reduced, thereby achieving efficient, simple, and environmentally friendly metal dissolution. In addition, the total amount of acetyl halide, oxalyl halide, and hydrogen peroxide only need to be selected within the scope of the present invention, without considering factors such as the volume and mass of the material containing the metal to be dissolved, and the present invention can produce a continuous dissolution effect on the metal.

[0173] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for accelerating metal dissolution using alcohol-hydrogen peroxide, characterized in that: The method comprises the following steps: (1) introducing hydrogen peroxide into a liquid alcohol compound to prepare an alcohol-hydrogen peroxide solution; (2) adding at least one of acetyl halide and oxalyl halide to the alcohol-hydrogen peroxide solution obtained in step (1) to prepare a dissolving solution; (3) Adding a material containing the metal to be dissolved into the solution obtained in step (2) to dissolve the metal.

2. The method according to claim 1, characterized in that: The metal to be dissolved includes at least one of a precious metal or a common metal.

3. The method according to claim 2, characterized in that: The precious metal includes at least one of gold, silver, platinum, palladium and rhodium, and the common metal includes at least one of iron, manganese, titanium, chromium, zinc, tin, lead, aluminum, copper and nickel.

4. The method according to claim 1, characterized in that: The liquid alcohol compound includes at least one of methanol, ethanol, propanol, n-butanol, n-pentanol, hexanol, octanol, ethylene glycol, 1,2-propylene glycol, glycerol, tert-butanol, 1,4-butanediol, isopentanol, and isopropanol.

5. The method according to claim 1, characterized in that: The acetyl halide is at least one of acetyl bromide and acetyl chloride, and the oxalyl halide is at least one of oxalyl bromide and oxalyl chloride.

6. The method according to any one of claims 1 or 5, characterized in that: The total amount of the acetyl halide and oxalyl halide used is 0.5-3 ml.

7. The method according to claim 1, characterized in that: The amount of hydrogen peroxide used is 0.5 to 5 ml.

8. The method according to claim 1, characterized in that: In the step (3), the dissolved liquid is stirred, and the stirring speed is 400 to 2000 r / min.

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