The method comprises the following steps: firstly, dissolving and nitrating elemental gold by aqua regia to obtain a chlorate gold solution secondly, adding sodium thiosulfate in the chlorate gold solution and reacting to generate a sodium gold thiosulfate thirdly, adding ethanol and separating out sodium gold thiosulfate precipitation fourthly, adding a sodium sulfide solution for complexing and finally, carrying out filtering by using activated carbon to remove sulfur, thus obtaining the sodium gold sulfide solution. The invention provides a preparation method of a sodium gold sulfide solution for cyanide-free gold plating.

C01G7/006- Compounds containing, besides gold, two or more other elements, with the exception of oxygen or hydrogen.

C01G- COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F.

C25D3/48- Electroplating: Baths therefor from solutions of gold.

C25D3/02- Electroplating: Baths therefor from solutions.

C25D3/00- Electroplating: Baths therefor.

C25D- PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS ELECTROFORMING APPARATUS THEREFOR.

C25- ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR.

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Original Assignee Guangdong Guanghua Science And Technology Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Guangdong Guanghua Science And Technology Co Ltd Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor 谭泽黄永润肖定军何为王翀陶志华 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number CN201611159618.8A Other languages Chinese ( zh) Google Patents Preparation method of sodium gold sulfide solution for cyanide-free gold platingĭownload PDF Info Publication number CN106637314A CN106637314A CN201611159618.8A CN201611159618A CN106637314A CN 106637314 A CN106637314 A CN 106637314A CN 201611159618 A CN201611159618 A CN 201611159618A CN 106637314 A CN106637314 A CN 106637314A Authority CN China Prior art keywords gold sodium solution sub preparation Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents CN106637314A - Preparation method of sodium gold sulfide solution for cyanide-free gold plating In an environment of gold-bearing rocks, the dissolved gold content is 40 times higher than in comparable non-gold-bearing areas (Benedetti and Boulègue, 1991).CN106637314A - Preparation method of sodium gold sulfide solution for cyanide-free gold plating Some iron and sulfur oxidizers (e.g., Acidothiobacillus ferrooxidans, Acidithiobacillus thiooxidans) contribute to the disintegration of important gold ores (Nordstrom and Southam, 1997). Furthermore, the current high price of gold has led to intensive research into the precipitation of gold. The impact of the use of microbial activity for the solution and precipitation of gold was undervalued for a long period, thus affording the opportunity for economic and environmentally friendly gold bio-processing. Precipitation/Bioaccumulation of gold is the precipitation of fine-grained gold colloids by microbial activities.

Precipitate gold from gold thiosulfate