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Q&As since 1989
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Industrial Preparation of GPC
Q. I would like to know how does the purity of Gold Potassium Cyanide (PGC) affect the gold plating quality. I understand PGC in the market have different gold content of between 68.1% and 68.32% .What is the higher purity PGC available in the market and who are the manufacturer could supply plant to produce high purity PGC. We plan to start a plant in Malaysia to produce high purity PGC.
Thank you,
Edmund Wei [last name deleted for privacy by Editor]- Singapore
2002
Q. I am a chemistry teacher and I want to know how GPC is industrially prepared.
Mauro MicheloniTeacher - Urbino, Italy
2005
A. Hi,
GPC is prepared by dissolving Gold in aqua - regia; and the resulting Gold chloride is dissolved in Potassium cyanide to get GPC. In another procedure the gold chloride is dissolved in ammonia
[on
eBay or
Amazon] to form a brown precipitate of fulminating gold (an explosive) and this is dissolved in Potassium cyanide to form GPC.
- Hyderabad, Andhra Pradesh, India
A. Potassium cyanide cannot be added directly to gold chloride, as this liberates HCN gas, so gold fulminate method is the ideal one to manufacture industrially. Care to be taken to boil to expel ammonia.
Panjala Mukesh
fashion jewelry mfgr.
Hyderabad, India
Q. Dear sir,
I want to manufacture GOLD POTASSIUM CYANIDE
Can you help me? I want to set up a unit of this. Please help me how to prepare gold potassium cyanide, and what are the machinery that to be used in manufacturing of gold potassium cyanide.
jewellery - India
February 1, 2008
"Recovery and Refining Of precious Metals"
by C.W. Ammen
on
AbeBooks
or
eBay
or
Amazon
(affil links)
! Hi Kamlesh. As you might infer from the previous postings in this thread, this operation is fraught with serious dangers! Cyanide is an instantaneous poison, whether accidentally ingested or inhaled as hydrogen cyanide gas through accidental acidification. The intermediate steps in the manufacturing process generate motion sensitive explosive fulminates. Please don't attempt something like this from an internet posting, but only after you have found an experienced professional to give you hands-on training. Good luck.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Q. Sir, I want to know how to prepare gold chloride. Another than the method from aqua regia.
Navnit SidhuStudent - kota,rajasthan, India
July 6, 2008
Q. I am preparing gold potassium cyanide with high purity by electrolytic method. But I don't know about trivalent gold potassium cyanide preparation. So anybody can tell how to prepare trivalent gold potassium cyanide?
K. Saravanababu- Coimbatore, India
April 16, 2009
? Hi, K. What element do you want to be trivalent -- the gold? I'm not familiar with that. I'm lost and would love a paragraph of explanation. Thanks!
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
A. Dear Ted, for your information gold has two valance (mono and tri). GPC is monovalent Gold potassium cyanide, it is used commonly for gold plating. For some special case of gold plating we are using TGPC -- Trivalent gold potassium cyanide.
Gold potassium cyanide -- K[Au(CN)2]
Trivalent gold potassium cyanide -- K[Au(CN)4]
Everybody can manufacture trivalent gold potassium cyanide from gold tri chloride. Direct addition for potassium cyanide in gold chloride TGPC will form. Anyone can help me how to manufacture gold tri chloride (AuCl3)?
- Coimbatore, India
April 18, 2009
Q. Mr K Saravanababu,
Can you please help us with manufacturing process of GPC>
Regards
- Mumbai, Maharashtra, India
April 12, 2011
! Hi, Rajan.
While we are waiting to see if Saravanababu returns to this thread, you may want to review letter 2236 which includes a 15-step instruction. Good luck. But readers must remember that the Internet is a giant one-room schoolhouse, and few people have received sufficient training to be able to safely do everything that they can read about. These are very dangerous chemicals to work with, and to just start in trying to do it based on internet forum snippets would be ludicrously dangerous!
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Q. Mr K Saravanababu,
Could you please tell me of what material you have made the cathode in manufacturing of GPC from electrolytic method?
- Karachi, Pakistan
July 21, 2011
Multiple threads were merged: please forgive repetition, chronology errors, or disrespect towards other postings [they weren't on the same page] :-)
Q. Sir. What chemicals can I use to change colour as red and yellow in gpc plating.
mr mahbub rahmanmodina electropolishing chemicals - dhaka.bangladesh
October 3, 2010
A. Hi, Mahbub. Some threads about coloring of gold electroplating include: 15006, 52562, 34622, and 47601. Good luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Q. Hi friends,
I'm busy in manufacturing gold potassium cyanide, but the syllabus about related GPC I cannot get from a book, the net, or an experience-holder. But I will make GPC if you share talking about any type of information; we will get success. I also take the project of making GPC crystals.
mohammad anwar maniyar
- jalgaon Maharashtra India
January 8, 2011
Q. Please explain PGC electrochemical preparation method? Thanks.
Saman Nazari- Ilam, Iran
December 22, 2013
A. Hi folks. An issue here is that cyanide is horribly dangerous and nobody should ever be working with cyanide until they've had haz-mat training as well as personal hands-on training regarding cyanide chemistry. And if they have had that training, then they generally don't have questions like this :-)
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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