Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing organic compound
Patent
1998-07-09
1999-11-09
Gorgos, Kathryn
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing organic compound
204537, 204539, 204541, C25B 300, C25B 700
Patent
active
059807245
ABSTRACT:
Described is 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. An electrolytic cell is provided having (1) a catholyte compartment containing a cathode assembly comprising a cathode and a bipolar ion exchange membrane, (2) an anode compartment containing an anode assembly comprising either (a) a hydrogen consuming gas diffusion anode and a current collecting electrode or (b) a hydrogen consuming gas diffusion anode which is fixedly held between a hydraulic barrier and a current collecting electrode, and (3) at least one pair of intermediate compartments separating the catholyte and anode compartments and separated from each other by an anion exchange membrane. The following are introduced into the cell: a first aqueous conductive electrolyte solution into the catholyte compartment; hydrogen gas into the anode compartment; an aqueous solution of .alpha.-halohydrin into the first compartment of the pair of intermediate compartments; and a second aqueous conductive electrolyte solution into the second compartment of the pair of intermediate compartments. Direct current is passed through the electrolytic cell, and an aqueous solution comprising epoxide is removed from the first compartment.
REFERENCES:
patent: 3288692 (1966-11-01), Le Duc
patent: 3351635 (1967-11-01), Kollar
patent: 3427235 (1969-02-01), Le Duc
patent: 3451905 (1969-06-01), Kronig et al.
patent: 3501388 (1970-03-01), Kronig et al.
patent: 3635803 (1972-01-01), Binns et al.
patent: 4024043 (1977-05-01), Dege et al.
patent: 4116889 (1978-09-01), Chlanda et al.
patent: 4560451 (1985-12-01), Nielsen
patent: 4634506 (1987-01-01), Novak et al.
patent: 4726887 (1988-02-01), McIntyre
patent: 5411641 (1995-05-01), Trainham, III et al.
patent: 5527436 (1996-06-01), Cooker et al.
Holbrook et al., Electrooxidation of Olefins at a Silver Electrode, Journal of Catalysis 1975, vol. 38, 1975, pp. 294-298, no month available.
Chou et al., Anodic Oxidation of Propylene on a Screen Electrode, Chemical Engineering Science 1980, vol. 35, pp. 1581-1590, no month available.
Van Der Eijk et al., Electrochemical Epoxidation of Olefins, Catalysis Today 1988, vol. 3, pp. 259-266, no month available.
Scott et al., "Pilot Scale Electrosynthesis of Alkene Oxides by Direct and Indirect Oxidation in a Sieve Plate Electrochemical Reactor", Chemical Engineering Science 1992, vol. 47, pp. 2957-2962, no month available.
Oduoza et al., "Aspects of the Direct Electrochemical Oxidation of Propylene", Chem. Eng. Symp. Series 1994, No. 127, pp. 37-48, no month available.
Otsuka et al., "Simultaneous Epoxidation of 1-Hexene and Hydroxylation of Benzene During Electrolysis of Water", Chemistry Letters 1994, pp. 1861-1864, no month available.
Otsuka et al., Electrocatalytic Synthesis of Propylene Oxide During Water Electrolysis, Journal of Catalysis 1995, vol. 157, pp. 450-460, no month available.
Foller Peter C.
Roberts David G.
Tang Robert H.
Zhang Yingchao
Franke James R.
Gorgos Kathryn
PPG Industries Ohio Inc.
Stein Irwin M.
Wong Edna
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