Process for beta-lactone production
First Claim
Patent Images
1. A continuous method of making a beta-propiolactone from ethylene oxide, the method comprising steps of:
- reacting, in a reactor, the contents of a feed stream comprising ethylene oxide, a solvent, a carbonylation catalyst and carbon monoxide to produce a liquid reaction product stream comprising beta-propiolactone and carbonylation catalyst;
separating, outside the reactor, at least a portion of the beta-propiolactone in the reaction product stream from the carbonylation catalyst to produce;
i) a beta-propiolactone stream comprising beta-propiolactone, andii) a liquid catalyst recycling stream comprising carbonylation catalyst; and
adding the liquid catalyst recycling stream to the feed stream;
the method further comprising;
treating the beta-propiolactone stream under conditions to convert the beta-propiolactone into a compound selected from the group consisting of acrylic acid, acrylates, acrylamide, and polyacrylates.
3 Assignments
0 Petitions
Accused Products
Abstract
The present application provides a method for producing an beta-lactone product. The method includes the steps of: reacting an epoxide, a solvent with a carbonylation catalyst and carbon monoxide to produce a reaction stream comprising a beta-lactone then separating a portion of the beta-lactone in the reaction stream from the solvent and carbonylation catalyst to produce: i) a beta-lactone stream with the beta-lactone, and ii) a catalyst recycling stream including the carbonylation catalyst and the high boiling solvent; and adding the catalyst recycling stream to the feed stream.
49 Citations
40 Claims
-
1. A continuous method of making a beta-propiolactone from ethylene oxide, the method comprising steps of:
-
reacting, in a reactor, the contents of a feed stream comprising ethylene oxide, a solvent, a carbonylation catalyst and carbon monoxide to produce a liquid reaction product stream comprising beta-propiolactone and carbonylation catalyst; separating, outside the reactor, at least a portion of the beta-propiolactone in the reaction product stream from the carbonylation catalyst to produce; i) a beta-propiolactone stream comprising beta-propiolactone, and ii) a liquid catalyst recycling stream comprising carbonylation catalyst; and adding the liquid catalyst recycling stream to the feed stream; the method further comprising;
treating the beta-propiolactone stream under conditions to convert the beta-propiolactone into a compound selected from the group consisting of acrylic acid, acrylates, acrylamide, and polyacrylates. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39)
-
-
2. A continuous method of making a beta-propiolactone from ethylene oxide, the method comprising steps of:
-
reacting, in a reactor, the contents of a feed stream comprising ethylene oxide, a solvent, a carbonylation catalyst and carbon monoxide to produce a liquid reaction product stream comprising beta-propiolactone and carbonylation catalyst; returning the liquid reaction product stream to the feed stream until the weight percent of beta-propiolactone in the liquid reaction product stream is in the range of about 10% to about 90%; and then separating, outside the reactor, at least a portion of the beta-propiolactone in the liquid reaction product stream from the carbonylation catalyst to produce; i) a beta-propiolactone stream comprising beta-propiolactone, and ii) a liquid catalyst recycling stream comprising carbonylation catalyst; and adding the liquid catalyst recycling stream to the feed stream. - View Dependent Claims (38, 40)
-
Specification