Preparation of organo-tin compounds
AssigneeSociete Nationale Elf Aquitaine
InventorsMichel Foure, Jean-Yves Le Moal
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Abstract
Preparation of organo-tin compounds, particularly mercapto-tin compounds. A metal, preferably an alkali metal, or ammonium thioxanthate is reacted with a tin salt. In a variant, the thioxanthate is produced in the reaction medium per se, starting from the corresponding trithiocarbonate and an organic halide.
Claims15
A method of producing an organic tin compound having at least one sulfur atom in its molecule, which comprises reacting in an aqueous environment a thioxanthate of the formula ##STR10## where M is a cation selected from the group consisting of Na, K and NH.sub.4, R' being a radical selected from the group consisting of alkyl, cycloalkyl, alkenyl, aralkyl, carbo-alkoxyalkyl, oxo-alkyl, alkyl alkenylcarboxylate and aryl alkenyl-carboxylate, the alkyl and alkenyl having 1 to 18 carbon atoms and the aryl 6 to 12 carbon atoms, with a tin compound
- R.sub.n SnX.sub.(4-n)
- R being selected from the group consisting of C.sub.1 to C.sub.18 alkyl, C.sub.4 to C.sub.24 oxo-alkyl and C.sub.4 to C.sub.24 carbalkoxy-alkyl, n is 0 or an integer of 1 to 3, and X is a non-oxidizing anion, so as to split the thioxanthate to free carbon disulfide from it, separating the carbon disulfide thus freed, and recovering the organic sulfur containing tin compound formed from the reaction medium.
Dependencies are inferred from the claim text.