Distillation process for production of acrylic acid
First Claim
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1. A method for producing acrylic acid, comprising:
- (a) providing a feedstock stream comprising beta propiolactone and a solvent;
(b) directing the feedstock stream to a reaction zone, wherein the feedstock stream is contacted with a polymerization catalyst and wherein at least a portion of the beta propiolactone is converted to poly(propiolactone);
(c) maintaining the reaction zone at a temperature at or above the pyrolysis temperature of poly(propiolactone);
(d) thermal decomposing the poly(propiolactone) in the reaction zone to produce acrylic acid;
(e) withdrawing a distillation stream of the solvent from the reaction zone; and
(f) withdrawing an acrylic acid product stream from the reaction zone;
wherein steps (b) to (d) occur in the same reaction zone.
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Abstract
Provided are integrated processes for the conversion of beta propiolactone to acrylic acid. Systems for the production of acrylic acid are also provided.
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Citations
16 Claims
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1. A method for producing acrylic acid, comprising:
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(a) providing a feedstock stream comprising beta propiolactone and a solvent; (b) directing the feedstock stream to a reaction zone, wherein the feedstock stream is contacted with a polymerization catalyst and wherein at least a portion of the beta propiolactone is converted to poly(propiolactone); (c) maintaining the reaction zone at a temperature at or above the pyrolysis temperature of poly(propiolactone); (d) thermal decomposing the poly(propiolactone) in the reaction zone to produce acrylic acid; (e) withdrawing a distillation stream of the solvent from the reaction zone; and (f) withdrawing an acrylic acid product stream from the reaction zone;
wherein steps (b) to (d) occur in the same reaction zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification