The purification technology of sodium thiocyanate solvent, such as adsorption, extraction, ion\|exchange, ion\|retardation and gel charomatography, were introduced.

• 介绍了国内外腈纶生产过程中目前使用的吸附法、萃取法、离子交换法、离子延迟树脂法、凝胶色谱法等硫氰酸钠净化工艺。