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US 10,807,927 B2Granted
Methods and systems to form propylene chlorohydrin from dichloropropane using lewis acid
AssigneeCalera Corporation
InventorsMichael Joseph Weiss, Kyle Self, Thomas A Albrecht, Margarete K Leclerc
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Abstract
There are provided methods and systems to form propylene chlorohydrin by hydrolysis of dichloropropane in presence of Lewis acid and to further form propylene oxide from the propylene chlorohydrin.
Claims20
A methods to form propylene chlorohydrin (PCH), comprising:
- (i) contacting an anode with an anode electrolyte in an electrochemical cell wherein the anode electrolyte comprises metal chloride and saltwater;
- contacting a cathode with a cathode electrolyte in the electrochemical cell;
- applying voltage to the anode and the cathode and oxidizing the metal chloride with metal ion in a lower oxidation state to a higher oxidation state at the anode;
- (ii) withdrawing the anode electrolyte from the electrochemical cell and chlorinating propylene with the anode electrolyte comprising metal chloride with metal ion in higher oxidation state and the saltwater to result in one or more products comprising dichloropropane (DCP), and the metal chloride with the metal ion in the lower oxidation state;
- (iii) separating the one or more products comprising DCP;
- and
- (iv) hydrolyzing the DCP to PCH in an aqueous medium comprising Lewis acid.
4 more elements
A system to form PCH, comprising:
- (i) an electrochemical cell comprising an anode chamber comprising an anode and an anode electrolyte wherein the anode electrolyte comprises metal chloride and saltwater and the anode is configured to oxidize the metal chloride with metal ion in a lower oxidation state to a higher oxidation state;
- a cathode chamber comprising a cathode and a cathode electrolyte;
- and a voltage source configured to apply voltage to the anode and the cathode;
- (ii) a chlorination reactor operably connected to the anode chamber of the electrochemical cell and configured to obtain the anode electrolyte and chlorinate propylene with the anode electrolyte comprising the metal chloride with the metal ion in the higher oxidation state in the saltwater to result in one or more products comprising DCP and the metal chloride with the metal ion in the lower oxidation state;
- and
- (iii) a hydrolysis reactor operably connected to the chlorination reactor and configured to obtain the one or more products comprising DCP from the chlorination reactor and configured to hydrolyze the DCP to PCH in an aqueous medium comprising Lewis acid.
3 more elements
Dependencies are inferred from the claim text.