Process for making N-vinyl-2-pyrrolidone

Details Process for making N-vinyl-2-pyrrolidone Process for making N-vinyl-2-pyrrolidone

2006-01-03

2006-01-03

Saeed, Kamal A. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

06982337

ABSTRACT:
A process for making N-vinyl-2-pyrrolidone (NVP) is disclosed. The process comprises dehydrating N-(2-hydroxyethyl)-2-pyrrolidone (HEP) in the presence of a catalyst and added water. Adding an effective amount of water into the dehydration process reduces the amount of N-ethyl-2-pyrrolidone (NEP) formed compared with the amount produced in the absence of the added water. Adding water can also sustain high conversions of HEP, minimize heavies formation, and improve selectivity to NVP. The process provides high-purity NVP and avoids a costly crystallization step.

REFERENCES:
patent: 2669570 (1954-02-01), Schnizer
patent: 3821245 (1974-06-01), Kanetaka et al.
patent: 5410070 (1995-04-01), Franz et al.
patent: 5569770 (1996-10-01), Kuo et al.
patent: 5625076 (1997-04-01), Shimasaki et al.
patent: 5801252 (1998-09-01), Yano et al.
patent: 5994562 (1999-11-01), Ebel et al.
patent: 6489515 (2002-12-01), Kambe et al.

Affiliated with

Also associated with

Rating

Process for making N-vinyl-2-pyrrolidone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for making N-vinyl-2-pyrrolidone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making N-vinyl-2-pyrrolidone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3559807