Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing organic compound
Patent
1998-07-09
1999-12-07
Gorgos, Kathryn
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing organic compound
205456, C25B 300
Patent
active
059977159
ABSTRACT:
Describes a method of electrochemically converting .alpha.-halohydrins, e.g., 1-chloro-2-hydroxypropane and 1,3-dichloro-2-hydroxypropane, to epoxides, e.g., propylene oxide and epichlorohydrin. A three compartment electrolytic cell is provided having (1) a catholyte compartment containing a cathode assembly comprising a cathode and anion exchange membrane, (2) an anolyte compartment containing an anode assembly comprising an anode and a cation exchange membrane, and (3) an intermediate compartment partitioned from the catholyte and anolyte compartments by the anion and cation exchange membranes respectively. An aqueous solution of .alpha.-halohydrin is charged to the catholyte compartment, while hydrogen halide solutions are charged to the intermediate and anolyte compartments. Direct current is passed through the electrolytic cell and an aqueous solution comprising epoxide is removed from the catholyte compartment.
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Foller Peter C.
Franks James R.
Roberts David G.
Tang Robert H.
Zhang Yingchao
Franks James R.
Gorgos Kathryn
PPG Industries Ohio Inc.
Stein Irwin M.
Wong Edna
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