Process for the preparation of sulfuric acid from sulphur dioxid

Details Process for the preparation of sulfuric acid from sulphur dioxid Process for the preparation of sulfuric acid from sulphur dioxid

1976-09-20

1977-11-22

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204129, C25B 122, C25B 102

Patent

active

040594963

ABSTRACT:
In a process for the electrolytic production of sulfuric acid by oxidation of sulfur dioxide in the presence of water in an anode compartment of an electrolysis cell and of hydrogen in the cathode compartment of the cell, the cathode compartment containing aqueous sulfuric acid as catholyte and being separated from the anode compartment by a hydrogen-ion transfer permitting membrane, the improvement which comprises introducing sulfur dioxide, water and hydrogen iodide or iodine, removing a mixture of aqueous sulfuric acid and hydrogen iodide from the anode compartment, separating the sulfuric acid from the mixture, and removing from the cathode compartment the hydrogen set free therein. The process gives a substantially lower overvoltage than prior art processes.

REFERENCES:
patent: 3291708 (1966-12-01), Juda
patent: 3524801 (1970-08-01), Parsi

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