Method for making an oxirane
First Claim
Patent Images
1. A process for making 1,2-epoxy-3-chloropropane by reaction between allyl chloride and an inorganic peroxide compound in a liquid medium containing an alcohol as a diluent, the alcohol being at least partially water-soluble, the process comprising:
- collecting a mixture of reaction products comprising 1,2-epoxy-3-chloropropane, the alcohol and water and, optionally, the unconverted reactants;
placing the mixture in contact with an extraction solvent selected from the group consisting of o-xylene, m-xylene, p-xylene, p-dichlorobenzene, o-chlorotoluene, m-chlorotoluene, p-chlorotoluene, n-tridecane, o-dichlorobenzene, m-dichlorobenzene, 1,3,5-trimethylbenzene, decalin, o-chlorotoluene, 1,2,3-trichloropropane, allyl chloride, nitrobenzene and n-decane, and mixtures thereof, so as to obtain two distinct liquid phases, said extraction solvent being suitable for dissolving 1,2-epoxy-3-chloropropane, the alcohol being sparingly soluble in the solvent, the liquid phases comprising an extract containing at least some of the extraction solvent and at least 10% of the amount of 1,2-epoxy-3-chloropropane produced, and a raffinate containing at least some of the alcohol and at least some of the water;
collecting separately the extract and the raffinate;
subjecting the extract to a distillation in order to remove 1,2-epoxy-3-chloropropane therefrom; and
subjecting the raffinate to a distillation in order to remove water therefrom.
2 Assignments
0 Petitions
Accused Products
Abstract
An epoxide prepared by epoxidation of an olefinic compound by a peroixide compound in liquid medium is separated from the reaction medium by liquid-liquid extraction using an extraction solvent.
68 Citations
7 Claims
-
1. A process for making 1,2-epoxy-3-chloropropane by reaction between allyl chloride and an inorganic peroxide compound in a liquid medium containing an alcohol as a diluent, the alcohol being at least partially water-soluble, the process comprising:
-
collecting a mixture of reaction products comprising 1,2-epoxy-3-chloropropane, the alcohol and water and, optionally, the unconverted reactants;
placing the mixture in contact with an extraction solvent selected from the group consisting of o-xylene, m-xylene, p-xylene, p-dichlorobenzene, o-chlorotoluene, m-chlorotoluene, p-chlorotoluene, n-tridecane, o-dichlorobenzene, m-dichlorobenzene, 1,3,5-trimethylbenzene, decalin, o-chlorotoluene, 1,2,3-trichloropropane, allyl chloride, nitrobenzene and n-decane, and mixtures thereof, so as to obtain two distinct liquid phases, said extraction solvent being suitable for dissolving 1,2-epoxy-3-chloropropane, the alcohol being sparingly soluble in the solvent, the liquid phases comprising an extract containing at least some of the extraction solvent and at least 10% of the amount of 1,2-epoxy-3-chloropropane produced, and a raffinate containing at least some of the alcohol and at least some of the water;
collecting separately the extract and the raffinate;
subjecting the extract to a distillation in order to remove 1,2-epoxy-3-chloropropane therefrom; and
subjecting the raffinate to a distillation in order to remove water therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification