Bromoform question

[kjavanb123]

Hi,

Bromoform can seperate anything lighter than 2.88 density from higher density minerals. How much Bromoform is needed to extract 500kg of grind materials?

Thanks
Kevin

 

[butcher]

I Know nothing of bronoform, but do know fine gold can float well, so keep this in mind, if any types of oil in liquid (even the oil from skin).

 

[goldsilverpro]

According to this Wiki, bromoform can be quite dangerous to use.
http://en.wikipedia.org/wiki/Bromoform

There seems to be other less hazardous high density chemicals that can be used. For example:
http://www.heavyliquids.com/product_LST/su.htm

 

[Irons]

Thallium based heavy liquids are even more toxic.

 

[kjavanb123]

Thanks man

This site is truly usefull.

 

[goldsilverpro]

Thallium based heavy liquids are even more toxic.

In the late 60s, when I had a job of making up plating solutions, thallium sulfate was (and, still is) used, as a grain refiner, in small quantities in one of the high purity gold baths. It was handled very, very carefully. An endearing nickname for it was "hair tonic", since the first symptom when getting it in your system was the loss of hair.

 

[butcher]

:shock: sick and bald.

 

[ander]

If You need heavy liquid You can try some water solutions of low-toxic metals salts like zinc chloride, or just prepare "colloidal" ferric hydroxide I suppose. It behaves like homogenous liquid and it's quite heavy- coal mining industry widely uses it to separate coal form rock. Good luck

 

[kjavanb123]

If You need heavy liquid You can try some water solutions of low-toxic metals salts like zinc chloride, or just prepare "colloidal" ferric hydroxide I suppose. It behaves like homogenous liquid and it's quite heavy- coal mining industry widely uses it to separate coal form rock. Good luck

thanks, just curios what is the ratio of water and zinc chloride when mixing it? equal amount? Plz advise.

 

[Lou]

Thallium malonate was the popular one for gravity separation.

Sodium polytungstate is what I would use if I were you.

 

[ander]

You can make saturated solution of zinc salt- measure the density with areometer and simpy adjust to desired level by adding water portionwise and stirring well before each measurement until you get what you want. Polytungstate is also a good idea, I don't know how about molybdates- but both anions are rather low toxic.

 

[shadybear]

How about salt, I have been able to get it to about 1.5 and alittle higher
would salt work?