Potassium O-ethyl dithiocarbonate

Structural formula
General
Surname	Potassium O-ethyl dithiocarbonate
other names	Potassium ethyl xanthate; Potassium ethylxanthate; Potassium xanthate; KEX;
Molecular formula	C 3 H 5 OS 2 K
External identifiers / databases
EC number	205-439-3
ECHA InfoCard	100,004,946
PubChem	2735045
Wikidata	Q8005889
properties
Molar mass	160.30 g mol −1
Physical state	firmly
density	0.4–0.6 g cm −3 ( bulk density )
Melting point	220–250 ° C, decomposes between 210 and 225 ° C
solubility	very light in water (1090 g l −1 at 20 ° C)
safety instructions
H and P phrases	H: 228-302-332-315-319-335
	EUH: 018
	P: 210-260-305 + 351 + 338
Toxicological data	1700 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Potassium O -ethyldithiocarbonate , formerly potassium ethylxanthate , is a chemical compound from the group of potassium salts and xanthates (dithiocarbonates).

Extraction and presentation

Potassium O -ethyldithiocarbonate was first produced in 1822 by William Christopher Zeise from potassium hydroxide , carbon disulfide and ethanol .

use

Potassium O -ethyldithiocarbonate is mainly used as an anion-active collector in the flotation of copper, nickel and silver ores.

It is also used for syntheses: thioketones are accessible by reacting potassium O -ethyldithiocarbonate and dichlorides. Potassium O -ethyldithiocarbonate has also been investigated for use as a preservative , precipitation reagent, and in Japan for the liquid-liquid extraction of technetium and rhenium .

literature

B. Zöller: Potassium xanthate as a preservative . In: Reports of the German Chemical Society . tape 10 , no. 1 , January 1877, p. 52-52 , doi : 10.1002 / cber.18770100117 .
Hans-Jürgen Rahn: About the qualitative detection of cadmium in addition to copper with the help of potassium xanthate . In: Fresenius' Journal for Analytical Chemistry . tape 131 , no. 4 , 1950, p. 263-266 , doi : 10.1007 / bf00434477 .
E. Schuster: About the separation of technetium and rhenium by liquid-liquid extraction with potassium xanthate . In: Fresenius' Journal for Analytical Chemistry . tape 231 , no. 4 , 1967, p. 309-309 , doi : 10.1007 / bf00708141 .
Zohir Nedjar, Mustapha Bouhenguel, Abd Elbaki Djebaili: Synthesis and Structural Characterization of Xanthate (KEX) in Sight of Their Utilization in the Processe of Sulphides Flotation . In: Journal of Minerals and Materials Characterization and Engineering (Open Access) . tape 8 , no. 6 , June 2009, p. 469-477 ( scirp.org [PDF]).

Individual evidence

↑ ^a ^b ^c data sheet potassium-O-ethyldithiocarbonate (PDF) from Merck , accessed on May 30, 2014.
↑ ^a ^b Entry on potassium dithiocarbonate. In: Römpp Online . Georg Thieme Verlag, accessed on May 30, 2014.
↑ ^a ^b Entry on potassium O-ethyl dithiocarbonate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .
↑ Alexander Schönberg, Emil Frese: Organic sulfur compounds, LIV. Syntheses of thiocarbonyl compounds by the action of potassium xanthate or thioureas on gem. Dichlorides . In: Chemical Reports . tape 101 , no. 2 , February 1968, ISSN 0009-2940 , pp. 701-715 , doi : 10.1002 / cber.19681010241 .

[merck-1] ta sheet potassium-O-ethyldithiocarbonate (PDF) from Merck , accessed on May 30, 2014.

[roempp-2] Entry on potassium dithiocarbonate. In: Römpp Online . Georg Thieme Verlag, accessed on May 30, 2014.

[GESTIS-3] Entry on potassium O-ethyl dithiocarbonate in the GESTIS substance database of the IFA , accessed on July 23, 2016(JavaScript required) .

[4] Alexander Schönberg, Emil Frese: Organic sulfur compounds, LIV. Syntheses of thiocarbonyl compounds by the action of potassium xanthate or thioureas on gem. Dichlorides . In: Chemical Reports . tape 101 , no. 2 , February 1968, ISSN 0009-2940 , pp. 701-715 , doi : 10.1002 / cber.19681010241 .