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To: Boolish who wrote (138535)	3/14/2014 2:45:59 PM
From: ayeyou	Read Replies (1) of 233835

Chlorine based gold extraction has been used since the 1880s. It is not a new concept. There are many patents issued based on chlorine as a gold leachent. I have no doubt that Nichomet has made some improvements or done some tweaking of the process but it is not something they have a lock on and no one else can use chlorine as a leachent. Chlorine based leach systems have a problem with sulphide ores as it causes massive losses of leachent to oxidize the sulphides. Recovery of the gold from solution is also challenging using a chloride based leach.As for the tailings basically being fertilizer you may be confusing chlorine with thiosulphate which is actually a better leachent then chlorine and the tailings are totally benign unlike chlorine byproducts. As I said there have been scores of patents issued re chloride based leaching of gold and silver. The slightest variance in the process of extraction allows for another patent to be issued. Here is one of them but if you do a search you will find many more , this is a Falconbridge patent from 1971 , Inco also has a chlorine leach patent as well as a few other majors. google.com

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