Amino acid co-enhanced gold leaching agent as well as preparation method and application thereof

Abstract

The invention provides an amino acid co-enhanced gold leaching agent and a preparation method and application thereof, and belongs to the technical field of hydrometallurgy. The amino acid co-enhanced gold leaching agent provided by the invention comprises the following components in percentage by mass: 10-80% of amino acid, 1-50% of a sulfur-containing activator, 1-30% of a stabilizer, 1-30% of an oxidant, 1-10% of a complexing agent, 0.1-30% of a surfactant and 0.1-10% of a carrier. The gold leaching agent provided by the invention contains amino acid which can act together with the sulfur-containing activating agent to form a co-strengthening system, so that the gold leaching effect is improved. Results of the embodiment show that the gold leaching rate of the amino acid co-enhanced gold leaching agent is larger than or equal to 93%.

Description

Technical Field

[0001] This invention belongs to the field of hydrometallurgical technology, specifically relating to an amino acid co-strengthened gold leaching agent, its preparation method, and its application. Background Technology

[0002] Cyanide leaching is the main method for gold extraction, but the free cyanide ions released by cyanide are highly toxic, seriously endangering the health of operators and damaging the natural ecological environment. Therefore, the development and use of low-toxicity or non-toxic leaching agents are of great significance to the sustainable development of mining enterprises.

[0003] Currently, commonly used low-toxicity or non-toxic gold leaching agents are mainly divided into two categories: cyanide-free gold leaching agents (i.e., non-cyanide gold extraction agents) and cyanide-containing gold leaching agents. Cyanide-containing gold leaching agents mainly include thiocyanate, sodium cyanate, and sodium dicyandiamide. These agents are formed by the bonding of a cyano group with a hydrocarbon group or heteroatom (S, N, etc.). Their cyano group, combined with S or N, forms a thiocyanate ion or cyanamide, which is fixed within an organic complex ion and does not easily dissociate to release free CN. - However, while it can utilize the lone pair electrons of its active atoms N or S to combine with gold ions for effective gold leaching, certain hazards still exist. In contrast, cyanide-free gold leaching agents produce highly toxic CN. - This represents a future development direction, primarily encompassing thiosulfates, thiourea, lime sulfur, polysulfides, halogens, and their compounds. However, their leaching efficiency still needs further improvement. Therefore, how to improve gold leaching agents to further enhance their leaching effect has become a challenging issue in this field. Summary of the Invention

[0004] The purpose of this invention is to provide an amino acid-co-reinforced gold leaching agent, its preparation method, and its application. The gold leaching agent provided by this invention has a better leaching effect.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: The present invention provides an amino acid co-strengthened gold immersion agent, which comprises the following components by mass percentage: 10-80% amino acids, 1-50% sulfur-containing activator, 1-30% stabilizer, 1-30% oxidant, 1-10% complexing agent, 0.1-30% surfactant and 0.1-10% carrier.

[0006] Preferably, the amino acid includes one or more of glycine, alanine, valine, phenylalanine, histidine, aspartic acid, asparagine, and cysteine.

[0007] Preferably, the sulfur-containing activator includes one or more of thiourea, polysulfides, and sulfides.

[0008] Preferably, the stabilizer includes one or more of triammonium citrate, sodium sulfite, trisodium citrate, and tripotassium citrate.

[0009] Preferably, the oxidant includes one or more of potassium persulfate, sodium persulfate, ammonium persulfate, barium peroxide, sodium peroxide, sodium chlorate, manganese dioxide, potassium permanganate, and potassium chlorate.

[0010] Preferably, the complexing agent includes one or more of disodium ethylenediaminetetraacetate, oxalic acid, aminoacetic acid, citric acid, and tartaric acid.

[0011] Preferably, the surfactant comprises one or more of the following: disodium lauryl sulfosuccinate, fatty alcohol polyoxyethylene ether, disodium sulfosuccinate, disodium monoethanolamide sulfosuccinate, potassium lauryl phosphate, potassium monododecyl phosphate, AEO-3P alcohol ether phosphate, AEO-9P alcohol ether phosphate, potassium lauryl ether phosphate, ammonium fatty alcohol polyoxyethylene ether sulfate, cocoyl monoethanolamide, cocoyl diethanolamide, cocamidopropyl betaine, lauramidopropyl betaine, sodium dodecyl sulfonate, potassium dodecyl sulfonate, cocamidopropyl hydroxysulfonyl betaine, lauramidopropyl hydroxysulfonyl betaine, lauramidopropyl amine oxide, sodium lauryl amphoteric acetate, and potassium fatty acid soap.

[0012] Preferably, the carrier comprises one or more of diatomaceous earth, silica, and kaolin.

[0013] This invention also provides a method for preparing the amino acid co-strengthened gold immersion agent described in the above technical solution, comprising: The carrier and surfactant are mixed to obtain the first mixture. The first mixture is mixed with amino acids, sulfur-containing activators, stabilizers, and complexing agents to obtain a second mixture; The second mixture is mixed with an oxidant to obtain an amino acid co-strengthened gold immersion agent.

[0014] The present invention also provides the application of the amino acid co-strengthened immersion gold agent described in the above technical solution or the amino acid co-strengthened immersion gold agent prepared by the preparation method described in the above technical solution in the field of immersion gold.

[0015] This invention provides an amino acid co-strengthened gold leaching agent, comprising the following components by mass percentage: 10-80% amino acids, 1-50% sulfur-containing activator, 1-30% stabilizer, 1-30% oxidant, 1-10% complexing agent, 0.1-30% surfactant, and 0.1-10% carrier. The gold leaching agent provided by this invention contains amino acids, which include amino, carboxyl, and side chains. The donor atoms on the side chains can coordinate with gold to form stable complexes, which can interact with the sulfur-containing activator to form a co-strengthened system, thereby improving the gold leaching effect. The results of the examples show that the gold leaching rate of the amino acid co-strengthened gold leaching agent provided by this invention is ≥93%. Detailed Implementation

[0016] The present invention provides an amino acid co-strengthened gold immersion agent, which comprises the following components by mass percentage: 10-80% amino acids, 1-50% sulfur-containing activator, 1-30% stabilizer, 1-30% oxidant, 1-10% complexing agent, 0.1-30% surfactant and 0.1-10% carrier.

[0017] Unless otherwise specified, the present invention does not have any special limitations on the source of each component, and commercially available products well known to those skilled in the art can be used.

[0018] The amino acid co-strengthened gold immersion agent provided by the present invention comprises 10-80% amino acids by weight percentage. As one embodiment, the amount of amino acids used can be specifically 10%, 20%, 30%, 40%, 50%, 60%, 70%, or 80%.

[0019] In this invention, the amino acid preferably includes one or more of glycine, alanine, valine, phenylalanine, histidine, aspartic acid, asparagine, and cysteine.

[0020] This invention incorporates amino acids and controls their type and dosage to form a co-strengthening system with sulfur-containing activators, thereby increasing the gold leaching rate and shortening the leaching time.

[0021] The amino acid co-strengthened gold immersion agent provided by the present invention further includes 1-50% sulfur-containing activator by weight percentage. As one embodiment, the amount of sulfur-containing activator may be 1%, 5%, 10%, 20%, 30%, 40% or 50%.

[0022] In this invention, the sulfur-containing activator preferably includes one or more of thiourea, polysulfides, and sulfides; the polysulfides preferably include calcium polysulfide or sodium polysulfide. This invention controls the amount and type of sulfur-containing activator within the above-mentioned range, further improving the gold leaching effect.

[0023] The amino acid co-strengthened gold immersion agent provided by the present invention further includes 1-30% stabilizer by weight percentage. As one embodiment, the amount of stabilizer may be specifically 1%, 5%, 10%, 20%, or 30%.

[0024] In this invention, the stabilizer preferably includes one or more of triammonium citrate, sodium sulfite, trisodium citrate, and tripotassium citrate. This invention controls the amount and type of stabilizer within the above-mentioned range to further improve the gold leaching effect.

[0025] The amino acid co-strengthened gold immersion agent provided by the present invention further includes 1-30% oxidant by weight percentage. As one embodiment, the amount of oxidant may be specifically 1%, 4%, 5%, 10%, 20%, or 30%.

[0026] In this invention, the oxidant preferably includes one or more of potassium persulfate, sodium persulfate, ammonium persulfate, barium peroxide, sodium peroxide, sodium chlorate, manganese dioxide, potassium permanganate, and potassium chlorate. This invention controls the amount and type of oxidant within the above-mentioned range to further improve the gold leaching effect.

[0027] The amino acid co-strengthened gold immersion agent provided by the present invention further includes a complexing agent of 1-10% by weight percentage. As one embodiment, the amount of the complexing agent may be specifically 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, or 10%.

[0028] In this invention, the complexing agent preferably includes one or more of disodium ethylenediaminetetraacetate, oxalic acid, glycine, citric acid, and tartaric acid. This invention controls the amount and type of complexing agent within the above-mentioned range to further improve the gold leaching effect.

[0029] The amino acid co-reinforced gold immersion agent provided by the present invention further includes 0.1% to 30% surfactant by weight percentage. As one embodiment, the amount of surfactant may specifically be 0.1%, 1%, 5%, 10%, 15%, 20%, 25%, or 30%.

[0030] In this invention, the surfactant preferably comprises one or more of the following: disodium lauryl sulfosuccinate, fatty alcohol polyoxyethylene ether, disodium sulfosuccinate, disodium monoethanolamide sulfosuccinate, potassium lauryl phosphate, potassium monododecyl phosphate, AEO-3P alcohol ether phosphate, AEO-9P alcohol ether phosphate, potassium lauryl ether phosphate, fatty alcohol polyoxyethylene ether ammonium sulfate, cocoyl monoethanolamide, cocoyl diethanolamide, cocamidopropyl betaine, lauramidopropyl betaine, sodium dodecyl sulfonate, potassium dodecyl sulfonate, cocamidopropyl hydroxysulfonyl betaine, lauramidopropyl hydroxysulfonyl betaine, lauramidopropyl amine oxide, sodium lauryl amphoteric acetate, and potassium fatty acid soap. This invention controls the amount and type of surfactant within the above-mentioned range to further improve the gold leaching effect.

[0031] The amino acid co-strengthened gold immersion agent provided by the present invention further includes 0.1-10% carrier by weight percentage. As one embodiment, the amount of the carrier may be specifically 0.1%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, or 10%.

[0032] In this invention, the carrier preferably includes one or more of diatomaceous earth, silica, and kaolin; the silica is preferably spherical silica. This invention controls the amount and type of carrier within the above-mentioned range, further improving the gold leaching effect.

[0033] In this invention, the particle size of the amino acid, sulfur-containing activator, stabilizer, oxidant, complexing agent and carrier is preferably ≥120 mesh.

[0034] The immersion gold agent provided by this invention contains amino acids, which can work together with sulfur-containing activators to form a co-strengthening system, thereby controlling the composition of the immersion gold agent and the amount of each component to improve the immersion gold effect.

[0035] This invention also provides a method for preparing the amino acid co-strengthened gold immersion agent described in the above technical solution, comprising: The carrier and surfactant are mixed to obtain the first mixture. The first mixture is mixed with amino acids, sulfur-containing activators, stabilizers, and complexing agents to obtain a second mixture; The second mixture is mixed with an oxidant to obtain an amino acid co-strengthened gold immersion agent.

[0036] The present invention mixes a carrier and a surfactant to obtain a first mixture.

[0037] The present invention does not impose any special limitation on the mixing method of the carrier and the surfactant; any technical solution known to those skilled in the art can be used to mix the two evenly.

[0038] In one embodiment, the mixing is carried out in a mixer for 20 minutes; the mixing temperature is room temperature to 60°C; and the mixing uniformity (CV) of the first mixture is ≤5%.

[0039] After obtaining the first mixture, the present invention mixes the first mixture with amino acids, sulfur-containing activators, stabilizers and complexing agents to obtain the second mixture.

[0040] The present invention does not have any special limitations on the way the first mixture is mixed with amino acids, sulfur-containing activators, stabilizers and complexing agents. Any technical solution known to those skilled in the art can be used to mix the components evenly.

[0041] In one embodiment, the mixing is carried out in a mixer for 30 minutes; the mixing temperature is room temperature to 60°C; and the mixing uniformity (CV) of the second mixture is ≤5%.

[0042] After obtaining the second mixture, the present invention mixes the second mixture with an oxidant to obtain an amino acid co-strengthened gold immersion agent.

[0043] The present invention does not have any special limitation on the way the second mixture is mixed with the oxidant. Any technical solution known to those skilled in the art can be used to mix the components evenly.

[0044] In one embodiment, the mixing is carried out in a mixer for 30 minutes; the mixing temperature is room temperature to 60°C; and the mixing uniformity (CV) of the amino acid co-reinforced gold immersion agent is ≤5%.

[0045] The present invention also provides the application of the amino acid co-strengthened immersion gold agent described in the above technical solution or the amino acid co-strengthened immersion gold agent prepared by the preparation method described in the above technical solution in the field of immersion gold.

[0046] The present invention preferably involves roasting the gold ore to obtain roasted gold ore; The roasted gold ore is ground to obtain ore powder; The ore powder is mixed with water and alkali to obtain a slurry, and then an amino acid co-enhanced gold leaching agent is added for leaching to obtain a leachate.

[0047] The present invention preferably involves roasting the gold ore to obtain roasted gold ore.

[0048] In this invention, the roasting temperature is preferably 700~800℃, more preferably 750℃; the roasting time is preferably 1.5~2.5h, more preferably 2h.

[0049] After roasting, the present invention preferably cools the roasted product to obtain roasted gold ore.

[0050] The present invention does not impose any special limitations on the cooling operation; any technical solution known to those skilled in the art can be used.

[0051] After obtaining roasted gold ore, the present invention preferably grinds the roasted gold ore to obtain ore powder.

[0052] The present invention does not impose any special limitations on the grinding operation, and any technical solution known to those skilled in the art can be used.

[0053] In this invention, the content of ore powder with a particle size ≤0.038mm is preferably ≥85%.

[0054] After obtaining the ore powder, the present invention preferably mixes the ore powder with water and alkali to obtain a slurry, and then adds an amino acid co-enhanced gold leaching agent to perform leaching to obtain a leachate.

[0055] In this invention, the mass concentration of the slurry is preferably 30-40%.

[0056] The present invention does not have a special limitation on the amount of water used, as long as the mass concentration of the slurry is within the required range.

[0057] In this invention, the pH value of the slurry is preferably 8.5 to 12.5.

[0058] In this invention, the alkali is preferably lime. There is no particular limitation on the amount of lime used, as long as the pH value of the slurry is within the required range.

[0059] In this invention, the preferred mass ratio of the amino acid co-enhanced gold leaching agent to the gold ore is (0.05~1.5):100.

[0060] In this invention, the leaching temperature is preferably 25~60℃; the leaching time is preferably 24~48h; the leaching is preferably carried out under stirring conditions; and the stirring rate is preferably 200~500rpm.

[0061] This invention controls parameters such as the dosage of each component, leaching temperature, and time during the leaching process, which can further improve the leaching effect.

[0062] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0063] In each embodiment, the particle size of the amino acid, sulfur-containing activator, stabilizer, oxidant, complexing agent and carrier is ≥120 mesh, and the amino acid, sulfur-containing activator and stabilizer are dried in an oven at 50°C until the moisture content is 0.5wt%.

[0064] Example 1 An amino acid co-enhanced gold immersion agent, by mass percentage, comprises the following components: 40% amino acid (glycine), 30% sulfur-containing activator (thiourea), 10% stabilizer (triammonium citrate), 4% oxidant (sodium persulfate), 5% complexing agent (EDTA-2Na), 1% surfactant (potassium lauryl phosphate), and 10% carrier (spherical silica). The preparation method of the amino acid co-reinforced gold immersion agent is as follows: at room temperature, the carrier and surfactant are mixed in a mixer for 20 min, then amino acids, sulfur-containing activator, stabilizer and complexing agent are added, and the mixture is mixed for 30 min. Then an oxidant is added and the mixture is mixed for 30 min to obtain the amino acid co-reinforced gold immersion agent.

[0065] Application Example 1 Different gold ores (1#, 2#, 3#, 4#, and 5#) were roasted at 750℃ for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, in which 90% of the ore powder had a particle size ≤0.038mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12.2. The amino acid co-enhanced leaching agent from Example 1 was then added, with a mass ratio of amino acid co-enhanced leaching agent to gold ore of 0.05:100. The leaching was carried out at 25℃ and stirred at 300 rpm for 24 hours to obtain leaching solution and leaching residue. The leaching results are shown in Table 1.

[0066] Table 1 Leaching results from Application Example 1

[0067] Example 2 An amino acid co-strengthened gold immersion agent, by mass percentage, comprises the following components: 50% amino acid (glycine), 25% sulfur-containing activator (calcium polysulfide), 10% stabilizer (triammonium citrate), 4% oxidant (sodium persulfate), 5% complexing agent (EDTA-2Na), 1% surfactant (potassium lauryl phosphate), and 5% carrier (spherical silica). The preparation method of the amino acid co-strengthened gold immersion agent is the same as in Example 1.

[0068] Application Example 2 Different gold ores (1#, 2#, 3#, 4#, 5#, 6#, and 7#) were roasted at 750℃ for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, of which 90% had a particle size ≤0.038mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12.2. The amino acid co-enhanced leaching agent from Example 2 was then added, with a mass ratio of 0.1:100 between the amino acid co-enhanced leaching agent and the gold ore. The leaching was carried out at 25℃ and stirred at 300 rpm for 24 hours to obtain leaching solution and leaching residue. The leaching results are shown in Table 2.

[0069] Table 2 Leaching results from Application Example 2

[0070] Example 3 An amino acid co-enhanced gold immersion agent, by mass percentage, comprises the following components: 40% amino acid (glycine), 30% sulfur-containing activator (thiourea), 10% stabilizer (triammonium citrate), 4% oxidant (ammonium persulfate), 5% complexing agent (EDTA-2Na), 1% surfactant (potassium lauryl phosphate), and 10% carrier (spherical silica). The preparation method of the amino acid co-strengthened gold immersion agent is the same as in Example 1.

[0071] Application Example 3 Different gold ores (1#, 2#, 3#, and 4#) were roasted at 750℃ for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, in which 90% of the ore powder had a particle size ≤0.038mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12.2. The amino acid co-enhanced leaching agent from Example 3 was then added, with a mass ratio of 0.1:100 between the amino acid co-enhanced leaching agent and the gold ore. The leaching was carried out at 25℃ and stirred at 300 rpm for 24 hours to obtain leaching solution and leaching residue. The leaching results are shown in Table 3.

[0072] Table 3 Leaching results in Application Example 3

[0073] Example 4 An amino acid co-enhanced gold immersion agent, by mass percentage, comprises the following components: 40% amino acid (glycine), 30% sulfur-containing activator (sodium polysulfide), 10% stabilizer (triammonium citrate), 4% oxidant (sodium persulfate), 5% complexing agent (EDTA-2Na), 1% surfactant (potassium lauryl phosphate), and 10% carrier (spherical silica). The preparation method of the amino acid co-strengthened gold immersion agent is the same as in Example 1.

[0074] Application Example 4 Different gold ores (1#, 2#, 3#, 4#, 5#, 6#, and 7#) were roasted at 750℃ for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, in which 90% of the ore powder had a particle size ≤0.038mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12.2. The amino acid co-enhanced leaching agent from Example 4 was then added, with a mass ratio of amino acid co-enhanced leaching agent to gold ore of 0.2:100. The leaching was carried out at 25℃ and stirred at 300 rpm for 24 hours to obtain leaching solution and leaching residue. The leaching results are shown in Table 4.

[0075] Table 4 Leaching results from Application Example 4

[0076] Application Example 5 Gold ore (containing 87 g / t of gold, 1.9% arsenic, and 38% sulfur) was roasted at 750℃ for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, with 90% of the powder having a particle size ≤0.038 mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12. The amino acid co-enhanced leaching agent from Example 4 was then added, with a mass ratio of 0.1:100 between the amino acid co-enhanced leaching agent and the gold ore. Leaching was carried out at 25℃ and 450 rpm for 32 hours, yielding a leachate and leaching residue. The test results showed that the gold leaching rate was 99.3%.

[0077] Example 5 An amino acid co-enhanced gold immersion agent, by mass percentage, comprises the following components: 40% amino acid (alanine), 30% sulfur-containing activator (sodium polysulfide), 10% stabilizer (triammonium citrate), 4% oxidant (sodium persulfate), 5% complexing agent (EDTA-2Na), 1% surfactant (potassium lauryl phosphate), and 10% carrier (spherical silica). The preparation method of the amino acid co-strengthened gold immersion agent is the same as in Example 1.

[0078] Application Example 6 Different gold ores (1#, 2#, 3#, and 4#) were roasted at 750℃ for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, in which 90% of the ore powder had a particle size ≤0.038mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12.2. The amino acid co-enhanced leaching agent from Example 5 was then added, with a mass ratio of amino acid co-enhanced leaching agent to gold ore of 0.2:100. The leaching was carried out at 25℃ and stirred at 300 rpm for 24 hours to obtain leaching solution and leaching residue. The leaching results are shown in Table 5.

[0079] Table 5 Leaching results in Application Example 6

[0080] Example 6 An amino acid-enhanced gold immersion agent, by mass percentage, comprises the following components: 40% amino acid (phenylalanine), 30% sulfur-containing activator (thiourea), 10% stabilizer (triammonium citrate), 4% oxidant (sodium persulfate), 5% complexing agent (EDTA-2Na), 1% surfactant (potassium lauryl phosphate), and 10% carrier (spherical silica). The preparation method of the amino acid co-strengthened gold immersion agent is the same as in Example 1.

[0081] Application Example 7 Gold ore (containing 71 g / t of gold, 2.1% arsenic, and 36% sulfur) was roasted at 750°C for 2 hours and cooled to room temperature to obtain roasted gold ore. The ore was then ground to obtain ore powder, with 90% of the powder having a particle size ≤0.038 mm. Water and lime were then added to obtain a slurry with a mass concentration of 33% and a pH of 12. The amino acid co-enhanced leaching agent from Example 6 was then added, with a mass ratio of 0.1:100 between the amino acid co-enhanced leaching agent and the gold ore. Leaching was carried out at 25°C and 450 rpm for 32 hours, yielding a leachate and leaching residue. The test results showed that the gold leaching rate was 99.1%.

[0082] In summary, the gold immersion agent provided by this invention has excellent gold immersion effect.

[0083] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An amino acid co-strengthened gold immersion agent, comprising the following components by mass percentage: 10-80% amino acids, 1-50% sulfur-containing activator, 1-30% stabilizer, 1-30% oxidant, 1-10% complexing agent, 0.1-30% surfactant, and 0.1-10% carrier.

2. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The amino acids include one or more of glycine, alanine, valine, phenylalanine, histidine, aspartic acid, asparagine, and cysteine.

3. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The sulfur-containing activator includes one or more of thiourea, polysulfides, and sulfides.

4. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The stabilizer includes one or more of triammonium citrate, sodium sulfite, trisodium citrate, and tripotassium citrate.

5. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The oxidizing agent includes one or more of potassium persulfate, sodium persulfate, ammonium persulfate, barium peroxide, sodium peroxide, sodium chlorate, manganese dioxide, potassium permanganate, and potassium chlorate.

6. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The complexing agent includes one or more of the following: disodium ethylenediaminetetraacetate, oxalic acid, glycine, citric acid, and tartaric acid.

7. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The surfactant comprises one or more of the following: disodium lauryl sulfosuccinate, fatty alcohol polyoxyethylene ether, disodium sulfosuccinate, disodium monoethanolamide sulfosuccinate, potassium lauryl phosphate, potassium monododecyl phosphate, AEO-3P alcohol ether phosphate, AEO-9P alcohol ether phosphate, potassium lauryl ether phosphate, ammonium fatty alcohol polyoxyethylene ether sulfate, cocoyl monoethanolamide, cocoyl diethanolamide, cocamidopropyl betaine, lauramidopropyl betaine, sodium dodecyl sulfonate, potassium dodecyl sulfonate, cocamidopropyl hydroxysulfonyl betaine, lauramidopropyl hydroxysulfonyl betaine, lauramidopropyl amine oxide, sodium lauryl amphoteric acetate, and potassium fatty acid soap.

8. The amino acid co-strengthened gold immersion agent according to claim 1, characterized in that, The carrier includes one or more of diatomaceous earth, silica, and kaolin.

9. A method for preparing the amino acid co-strengthened gold immersion agent according to any one of claims 1 to 8, comprising: The carrier and surfactant are mixed to obtain the first mixture. The first mixture is mixed with amino acids, sulfur-containing activators, stabilizers, and complexing agents to obtain a second mixture; The second mixture is mixed with an oxidant to obtain an amino acid co-strengthened gold immersion agent.

10. The application of the amino acid co-strengthened immersion gold agent according to any one of claims 1 to 8 or the amino acid co-strengthened immersion gold agent prepared by the preparation method according to claim 9 in the field of immersion gold.

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