Method for preparing deodorized N-vinyl-2-pyrrolidone

摘要

The invention provides a method for producing purified N-vinyl-2-pyrrolidone free of odorous components. The method comprises distilling with a distillation column a liquid, which is formed by adding to an odorous components-containing liquid having a N-vinyl-2-pyrrolidone purity of not lower than 90 wt %, a compound having boiling point lower than that of N-vinyl-2-pyrrolidone, and whereby removing the odorous components together with said low-temperature boiling compound as the distillate.