Product recovery from supercritical mixtures
View Patent ↗Oxidation products are recovered from a mixture of the products in a dense phase or supercritical solvent by a liquid—liquid extraction at dense phase conditions.
1. The process for the separation of oxidation products from a reaction mixture comprised of said products in a solvent at dense phase conditions wherein the reaction mixture is contacted with an extraction solvent which is substantially immiscible with the dense phase solvent and separating a liquid phase containing the oxidation products from a dense phase solvent stream.
2. The process of claim 1 wherein the extraction solvent has a total solubility parameter greater than 24 MPa 0.5 with the hydrogen bonding portion of the solubility parameter greater than 15 MPa 0.5 .
3. The process of claim 1 wherein the dense phase solvent is carbon dioxide.
4. The process of claim 1 wherein the dense phase solvent is propane.
5. The process of claim 1 wherein the dense phase solvent is propylene.
6. The process of claim 1 wherein the oxidation products comprise propylene oxide.
7. The process of claim 1 wherein the immiscible solvent is an aqueous solvent.
8. The process of claim 1 wherein the immiscible solvent is acetonitrile.