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A xanthate is a salt or ester of a xanthic acid. The formula of the salt of xanthic acid is [R−O−CS2]−M+ (where R is organyl group and M is usually Na or K ). [1] . Xanthate also refers to the anion [R−O−CS2]−.
Xanthate, any of a class of organic salts formed by treatment of an alcohol with carbon disulfide in the presence of an alkali. The term is derived from the Greek word xanthos, for “yellow,” in reference to the compound potassium ethyl xanthate (C2H5OCS2K), which gives a yellow precipitate when.
The xanthate method for the preparation of alkanethiols involves two stages: (i) synthesis of the alkyl xanthate and (ii) subsequent cleavage by base hydrolysis or reduction (Scheme 14). Alkyl xanthates are usually prepared by treatment of alkyl halide with potassium ethyl xanthate or similar alkali metal xanthate reagents.
Xanthates produce carbon disulfide in an aqueous solution through dissociation and through hydrolysis. Dissociation is more important in acidic media, while hydrolysis prevails in alkaline solutions, and is the main reaction pathway in mining processes ( Commonwealth of Australia, 1995 ).
Cellulose xanthate or viscose is an intermediate in the production of viscose rayon, used in the manufacture of textile fibers and cellophane wrapping. The manufacture of viscose starts by swelling the cellulose with sodium hydroxide.
Xanthates. II. Xanthates. A. The Carbon Disulfide–Methyl Iodide Procedure (The Standard Procedure for Xanthate Synthesis) The most common method for synthesizing O - [ (alkylthio)thiocarbonyl] esters of carbohydrates (carbohydrate xanthates) begins by forming an alkoxide ion from reaction of sodium hydride with a compound containing ...
14 de jun. de 2023 · Xanthate is one of the most common flotation collectors. It can be used for flotation of various metal sulfide ores and nonsulfide ores such as oxide copper ore, oxide lead ore, and lead sulfate ore. Methyl xanthate has short carbon chain and poor hydrophobicity, without practical application value in flotation.
