tag:blogger.com,1999:blog-8964719845369935777.post1792779805831397589..comments2024-03-27T21:23:40.339-04:00Comments on Chemjobber: Last week's C&ENChemjobberhttp://www.blogger.com/profile/15932113680515602275noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-8964719845369935777.post-7780662700169132232017-10-09T18:54:09.749-04:002017-10-09T18:54:09.749-04:00there is a competing gold extraction process that ...there is a competing gold extraction process that uses acidic solution of disulfide obtained by oxidation of thiourea, it has some advantage for heavily sulfidized ores but it is more expensive and the leaching solution is unstable, so it can be tricky to use on massive scale. And thiourea is hardly improvement, you have to use lots of it (up to 10% solution) and thiourea is a creepy cumulative thyroid toxin. With cyanide, the poisoning is much faster but the long-term exposure effects are less problematic. Also cyanide decomposes quite fast in the environment whereas thiourea lingersmilkshakehttps://www.blogger.com/profile/08188961610554710616noreply@blogger.com