Search results
Results From The WOW.Com Content Network
Sodium ethyl xanthate (SEX) [3] is an organosulfur compound with the chemical formula CH 3 CH 2 OCS 2 Na. It is a pale yellow powder, which is usually obtained as the dihydrate. Sodium ethyl xanthate is used in the mining industry as a flotation agent. [4] A closely related potassium ethyl xanthate (KEX) is obtained as the anhydrous salt.
Sodium salt of ethyl xanthate (sodium ethylxanthate or sodium O-ethyl dithiocarbonate) Structure of a xanthate ester Cellulose xanthate (orange) A xanthate is a salt or ester of a xanthic acid. The formula of the salt of xanthic acid is [R−O−CS 2] − M + (where R is organyl group and M is usually Na or K). [1] Xanthate also refers to the ...
This page was last edited on 23 February 2011, at 01:40 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Esters with the formula R−O−C(=S)−S−R are also called xanthates, while esters with the formula R−S−C(=S)−S−R are also called thioxanthates. Thiocarbonates also refer to salts of organyl thiocarbonate ions (e.g. sodium ethyl xanthate or SEX, CH 3 CH 2 OCS − 2 Na +). They contain R–CS 3−x O − x anions (x = 0, 1, or 2, R is ...
An example is sodium ethyl xanthate as a collector in the flotation of galena (lead sulfide) to separate it from sphalerite (zinc sulfide). The polar part of xanthate anion attaches to the ore particles and the non-polar hydrocarbon part forms a hydrophobic layer. The particles are brought to the water surface by air bubbles.
The tables below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure. Units of solubility are given in grams of substance per 100 millilitres of water (g/100 ml), unless shown otherwise.
Ethyl xanthic acid is an organic compound with the chemical formula CH 3 CH 2 −O−C(=S)−SH. It can be viewed as an O-ethyl ester of dithiocarbonic O,S-acid (the formula of that acid is S=C(OH)(SH)). Ethyl xanthic acid belongs to the category of thioacids, where the prefix thio-means that an oxygen atom in the compound is replaced by a ...
The alkali metal thioxanthates are produced by treating a thiol with a base in the presence of carbon disulfide, as illustrated by the preparation of sodium ethyl thioxanthate:. [1] EtSH + NaOH + CS 2 → EtSCS − 2 Na + + H 2 O. Sodium ethyl thioxanthate is similar structurally to sodium ethyl xanthate.