Chemistry: electrical and wave energy – Processes and products
Patent
1979-10-22
1981-01-20
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204129, 204DIG4, C25B 116, C25B 102, C25B 500
Patent
active
042460786
ABSTRACT:
A flow of an alkali hydroxide solution such as chloralkali cell liquor containing NaOH and NaCl is introduced into the anode compartment of a hybrid cell which also includes a cathode compartment separated from the anode compartment by a cation selective, permeable membrane. The anode and the cathode permit gas diffusion. Gaseous hydrogen is supplied to the anode; air to the cathode; and a flow of water or other aqueous solution to the cathode compartment. The chloralkali cell is electrically connected to the hybrid cell. When the same number of coulombs flow through the chloralkali cell and the hybrid cell, the introduced chloralkali cell liquor is depleted of alkali metal ions which pass through the membrane to the water flowing through the cathode compartment. Through electrolytic consumption of water and evaporation of water from the cathode surface, highly purified caustic solutions of up to 50% caustic content can be obtained.
REFERENCES:
patent: 2384463 (1945-09-01), Gunn et al.
patent: 3262868 (1966-07-01), Juda
patent: 3600228 (1971-08-01), La Conti
patent: 4093531 (1978-06-01), Babinsky et al.
patent: 4173524 (1979-11-01), McRae
Andrews R. L.
Occidental Research Corporation
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