Xanthogen formates

The alkyl chloroformates react with cold ethereal dispersions of the xanthates to give the fairly stable xanthogen formates. 

The reaction of chloroformates with sodium xanthates results in the formation of alkyl xanthogen formates that are useful as flotation agents in extraction of metals from their ores (48). 

Ion flotation in the presence of surfactants for the treatment of rinses and separation of metal ions is of interest since the sixties [327, 328]. Here, we take only a few examples. The recovery of silver ions from highly diluted solutions is possible by forming a silver-thiourea complex in form of a colloidal precipitate (sublate) followed by sublate flotation with sodium dodecyl benzene sulfonate [329]. Skiylev [330] has developed methods for the removal of non-ferrous metal salts from waste waters. Subject of the investigations were 0.01 - 0.001% solutions of ferrous metal salts. Typical anionic surfactants (alkyl sulfates, alkyl phosphates, alkyl xanthogenates of potassium) or cationic surfactants (quaternary ammonium salts) were used as collectors in ion flotation from diluted solutions. At certain pH, a sublate containing a non-ferrous metal ion was formed, followed by a sublate film formation at the surface due to the rise of the complexes with air bubbles stabilised by the surfactants. 

Diethyl-1,2-dihydro-1-phenyl-2-propylpyridine accelerator, coatings Amyl acid phosphate accelerator, cold-cure cements Dibutyl xanthogen disulfide accelerator, composites 1-Phenyl-3,3-dimethyl urea accelerator, concrete setting Calcium formate accelerator, cosmetics Sodium persulfate accelerator, CR... 

Xanthogenates, as salts, are oxidized by iodine with the formation of a disulfide... 

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