Synthesis of N-vinylformamide

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C502S402000

Reexamination Certificate

active

07026511

ABSTRACT:
A process to produce N-vinylformamide includes the steps of: reacting hydroxyethyl formamide with a reactant comprising at least one cyclic anhydride group to form an ester, and dissociating the ester via heat in a thin film evaporation to synthesize N-vinylformamide and a compound comprising at least one diacid group, the N-vinylformamide separating from the diacid during the thin film evaporation. The reactant including at least one cyclic anhydride group can, for example, be succinic anhydride, maleic anhydride, phthalic anhydride, (2-docecen-1-yl)succinic anhydride, exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride or a polymer including at least one cyclic anhydride group. A process to produce N-vinylformamide comprises the steps of: mixing acetaldehyde, formamide and a source of anhydride in a single reaction vessel, reacting the acetaldehyde, formamide and the source of anhydride in the reaction vessel under pressure, dissociating an ester formed by a reaction between the source of anhydride and hydroxyethyl formamide formed in the reaction vessel to synthesize N-vinylformamide and a compound comprising at least one diacid group.

REFERENCES:
patent: 4578515 (1986-03-01), Dawson et al.
patent: 4804686 (1989-02-01), Regnier
patent: 4942259 (1990-07-01), Parris
patent: 5059713 (1991-10-01), Armor
patent: 5527963 (1996-06-01), Sato
patent: 3500773 (1985-07-01), None
patent: 4116266 (1992-03-01), None
patent: 4438366 (1996-05-01), None
patent: 0 184 074 (1985-11-01), None
patent: 0361514 (1990-04-01), None
patent: 0362804 (1990-04-01), None
patent: 0440226 (1991-08-01), None
patent: 2 558 156 (1985-07-01), None
patent: 61097309 (1986-05-01), None
patent: 62059248 (1987-03-01), None
patent: 63-190862 (1988-08-01), None
patent: 63190862 (1988-08-01), None
patent: 03182946 (2001-07-01), None
patent: 03314417 (2002-08-01), None
patent: 03319007 (2002-08-01), None
patent: WO 2004/020395 (2004-03-01), None
patent: PCT/US2005/005840 (2005-02-01), None
Chang et al, macromolecules, 1993, vol. 26, pp. 4814-4817.
Parris, G.E. and Armor, J.N.; Catalytic Cracking of Organic Amides. II Use of Substituted Amides, Mechanism, and Predictive Index for Reactivity. Applied Catalysis, vol. 78, pp 65-78 (1991).
Chang, Yihua et al., Water-Soluble Copolymers. 47. Copolymerization of Maleic Anhydride and N-Vinylformamide; Macromolecules; (1993), 26; pp 4814-4817.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Synthesis of N-vinylformamide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synthesis of N-vinylformamide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis of N-vinylformamide will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3575581

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.