Methods of forming alpha, beta-unsaturated acids and esters

Details Methods of forming alpha, beta-unsaturated acids and esters Methods of forming alpha, beta-unsaturated acids and esters

2006-01-31

2006-01-31

Zucker, Paul A. (Department: 1621)

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

Organic compounds

Carboxylic acid esters

C560S212000, C562S599000

Reexamination Certificate

active

06992209

ABSTRACT:
The invention includes a method of forming an alpha, beta-unsaturated compound. A carboxylic acid is mixed with an alpha-hydroxy acid or an alpha-hydroxy ester and is esterified to form an alpha-acyloxy derivative. The alpha-acyloxy derivative is transformed into an alpha, beta-unsaturated derivative. The invention additionally includes a process of forming an acrylate. Lactic acid or a lactic acid ester is reacted with a first portion of acetic acid in the presence of a first catalyst to produce the corresponding 2-acetoxy propionic acid or ester. A non-reacted portion of the acetic acid is recycled. The 2-acetoxy propionic acid or ester is transferred to a second vessel containing a second catalyst, and acetic acid is liberated from the 2-acetoxy propionic acid or ester to produce a corresponding acrylic acid or acrylate ester. The acid or ester is subsequently esterified by reaction with an alcohol to form a desired acrylate ester.

REFERENCES:
patent: 3208857 (1965-09-01), Howard et al.
patent: 3487101 (1969-12-01), Völker et al.
patent: 4529816 (1985-07-01), DeColibus et al.
patent: 4617405 (1986-10-01), Kiely et al.
patent: 4729978 (1988-03-01), Sawicki
patent: 4786756 (1988-11-01), Paprizos et al.
patent: 4975537 (1990-12-01), Aristoff et al.
patent: 5068399 (1991-11-01), Naito et al.
patent: 5250729 (1993-10-01), Abe et al.
patent: 5252473 (1993-10-01), Walkup et al.
patent: 5679832 (1997-10-01), Stephens
patent: 4340369 (1994-10-01), None
Storey et al., “New Epoxy-Terminated Oligoesters: Precursor to Totally Bio Degradable Networks”, 1993, Journal of Polymer Science, Part A: Polymer Chemistry, 31(7), pp. 1825-1838.
Wurtz, A. et al., “Memoire sure L'Acide Lactique” (Report on Lactic Acid), Annals of Chemistry and Physics, 3rdseries, 1861, pp. 101-124 (includes translation).
Burns et al., Journal of the Chemical Society, 1935, pp. 400-406.

Affiliated with

Also associated with

Rating

Methods of forming alpha, beta-unsaturated acids and esters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of forming alpha, beta-unsaturated acids and esters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of forming alpha, beta-unsaturated acids and esters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3536464