Method and system for preparing xanthate by slurry method

A method for preparing powdered xanthate by a slurry method, comprising steps of:

• 1) adding dichloromethane and carbon disulfide into a slurry reactor and mixing through stirring, then adding an alcohol and an alkali and stirring for reaction;
• wherein the alcohol is C2-C12 fatty alcohol selected from the group consisting of ethanol, n-propanol, isopropanol, n-butanol, isobutanol, amyl alcohol, isoamyl alcohol, neopentyl alcohol, n-hexanol, isohexanol, methyl isobutyl carbinol, n-octanol, isooctyl alcohol, and dodecanol;
• the alkali is selected from sodium hydroxide and potassium hydroxide, in shape of powder, granule or flake;
• 2) turning on a vacuum pump to adjust a system pressure when a temperature of a reaction system begins to rise, so as to control the temperature of the reaction system and recover a solvent;
• and
• 3) injecting hot water or steam into a heating jacket of the slurry reactor after the solvent is recovered, so as to accelerate removal of the solvent and obtain powdered xanthate.