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US 2020/0347004 A1Published application
Distillation process for production of acrylic acid
AssigneeNovomer, Inc.
InventorSadesh H. Sookraj
Life of this patent
Estimating the term…
Abstract
Provided are integrated processes for the conversion of beta propiolactone to acrylic acid. Systems for the production of acrylic acid are also provided.
Claims21
A method for producing acrylic acid, comprising:
- (a) filtering a solvent stream and a beta propiolactone stream through a membrane;
- (b) contacting the solvent stream and the beta propiolactone stream in a first reaction zone in a presence of a polymerization catalyst;
- (c) polymerizing a poly(propiolactone) from the beta propiolactone stream, the solvent stream, and the polymerization catalyst in a second reaction zone;
- (d) decomposing, by thermolysis, the poly(propiolactone) into acrylic acid in the reaction zone;
- and
- (e) distilling a distillation stream, comprising the solvent steam, and a product stream, comprising the acrylic acid, from the reaction zone.
3 more elements
-18. (canceled)
A system, comprising:
- (a) a membrane that is configured to filter a beta propiolactone stream and a solvent stream;
- and
- (b) a reaction zone downstream of the membrane, the reaction zone is a single distillation column and is configured to:
- (i) receive the beta propiolactone stream and the solvent stream;
- (ii) concurrently polymerize beta propiolactone of the beta propiolactone stream to poly(propiolactone) in a presence of a polymerization catalyst and thermally decompose the poly(propiolactone) to acrylic acid;
- and
- (iii) output a distillation stream, comprising a solvent of the solvent stream, and a product stream, comprising the acrylic acid.
4 more elements
The system of clam 36, wherein the polymerization catalyst is a carboxylate salt of a protonated amine, a quaternary ammonium, guanidinium, sulfonium, arsonium, a substituted nitrogen-containing heterocycle cation, a phosphorus cation, or any combination thereof.
Dependencies are inferred from the claim text.