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US 2018/0022677 A1Published application
Distillation process for production of acrylic acid
AssigneeNovorner, Inc.
InventorSadesh H. SOOKRAJ
Life of this patent
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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.
Claims18
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.
5 more elements
A system for converting beta propiolactone to acrylic acid, comprising:
- (a) beta propiolactone (BPL) in a solvent;
- (b) a polymerization catalyst,
- wherein at or above the pyrolysis temperature of poly(propiolactone) (PPL), BPL begins polymerizing to PPL in the presence of the polymerization catalyst, which PPL concurrently thermally decomposes to acrylic acid, and wherein acrylic acid formed in situ maintains the reaction polymerizing BPL to PPL;
- and
- (c) a distillation stream of the solvent.
2 more elements
A system for converting beta propiolactone to acrylic acid, comprising:
- (a) a reaction zone comprising beta propiolactone (BPL), a solvent, and a polymerization catalyst;
- wherein at or above the pyrolysis temperature of poly(propiolactone) (PPL), BPL begins polymerizing to PPL in the presence of the polymerization catalyst, which PPL concurrently thermally decomposes to acrylic acid;
- (b) a distillation stream of the solvent;
- and
- (c) a return loop for providing acrylic acid to the reaction zone.
2 more elements
Dependencies are inferred from the claim text.