Method for preparing deodorized N-vinyl-2-pyrrolidone

Details Method for preparing deodorized N-vinyl-2-pyrrolidone Method for preparing deodorized N-vinyl-2-pyrrolidone

2006-05-02

2006-05-02

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

C203S060000, C203S062000, C203S063000, C203S067000, C203S068000, C203S069000, C203S070000, C203S071000, C548S555000

Reexamination Certificate

active

07037412

ABSTRACT:
The invention provides a method for producing purified N-vinyl-2-pyrrolidone free of odorous components. The method is composed of 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.

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