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Xanthate salts of alkali metals are produced by the treatment of an alcohol, alkali, and carbon disulfide. The process is called xanthation . [2] In chemical terminology, the alkali reacts with the alcohol to produce an alkoxide , which is the nucleophile that adds to the electrophilic carbon atom in CS 2 . [3]
1 de ene. de 2021 · The mechanism of xanthate degradation in aqueous solutions may occur through the following reactions (Rao, 2004), which have been widely accepted. In acid solutions (xanthate ion hydrolysis): (1) K + + ROC S 2 − + H 2 O → K + + OH − + ROC S 2 H. Decomposition of xanthic acid (2) ROC S 2 H → ROH + C S 2
14 de jun. de 2023 · Xanthate can undergo ionization, hydrolysis, decomposition, and other reactions in water, and the stability of its aqueous solution is affected by the solution pH as well as the oxidation. In acid solution, xanthate can generate xanthic acid and its dissociation constant (pK a) is 2–3.
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 (C 2 H 5 OCS 2 K), which gives a yellow precipitate when combined with copper sulfate.
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 an unprotected hydroxyl group. 1 (Imidazole usually is present in the reaction mixture to promote alkoxide ion formation.)
1 de ene. de 2019 · Alkali cellulose is used as a raw material for xanthation reaction where it reacts with carbon disulphide (CS 2) under desired process conditions to form cellulose xanthate (CX) for its dissolution in dilute alkali solution. Quality of CX formed during xanthation reaction affects the subsequent process steps.
1 de jul. de 2016 · This paper focuses on Sodium iso-Butyl Xanthate (SIBX) decomposition in aqueous solutions in the absence of minerals, which is a control for other conditions. Decomposition is defined as the breakup of the xanthate anion into fragments (such as carbon disulfide or carbonyl sulfide).
