Heh, I’m no expert…
I’m unable to find out much about the chemical works. Speculation has included soap and lime products, but there’s no clear record.
I covered the Superalloys site here on my main blog some time ago:
http://brownhillsbob.com/2011/02/05/metal-gurus/
However, again, info is thin. If there’s anything you can add, I’d be happy to share it with readers.
Best wishes
Bob