The chain is shortest in sodium ethyl xanthate that makes it highly selective to copper, nickel, lead, gold and zinc ores.
12.
It failed because the patent claims included all xanthates, but it was known that not all xanthates could be used in the process.
13.
It failed because the patent claims included all xanthates, but it was known that not all xanthates could be used in the process.
14.
Both xanthates and the related thioxanthates ( derived from treatment of CS 2 with sodium thiolates ) are used as flotation agents in mineral processing.
15.
The ore is then wet, suspended in a slurry, and mixed with xanthates or other reagents, which render the sulfide particles hydrophobic.
16.
The polar part of xanthate molecule attaches to the ore particles with the non-polar hydrocarbon part sticking out and forming a hydrophobic layer.
17.
In 2000, Australia produced up to 10, 000 tonnes of sodium ethyl xanthate and imported about 6, 000 tonnes, mostly from China.
18.
"' Sodium ethyl xanthate "'( SEX ) is an organosulfur compound with the chemical formula CH 3 CH 2 OCS 2 Na.
19.
The material produced in Australia is the so-called'liquid sodium ethyl xanthate'that refers to a 40 % aqueous solution of the solid.
20.
Xanthates typically undergo elimination from 120 to 200 �C, while esters typically require 400 to 500 �C and amine oxides routinely react between 80 and 160 �C.
