Process for hydrogen production from water

Details Process for hydrogen production from water Process for hydrogen production from water

1977-04-29

1978-11-28

Stern, Edward

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

423317, 423481, 423500, 423522, 423539, 423579, 4236585, C01B 103, C01B 714, C01B 718

Patent

active

041276442

ABSTRACT:
Hydrogen is produced from water by first reacting I.sub.2, SO.sub.2 and H.sub.2 O to make hydrogen iodide and sulfuric acid. A substantial molar excess of SO.sub.2 and I.sub.2 in the reaction zone creates a lighter sulfuric acid-bearing phase and a heavier polyiodic-acid-bearing phase. The heavier phase is separated, degassed and then contacted with phosphoric acid to permit distillation of HI of low water content and recovery of I.sub.2 as a separate fraction. Hydrogen is recovered from HI vapor, as by thermal decomposition.

REFERENCES:
patent: 2143222 (1939-01-01), Heath
patent: 3044862 (1962-07-01), Paul
patent: 3365276 (1968-01-01), Childs et al.
patent: 3839550 (1974-10-01), Wentorf, Jr.
patent: 3888750 (1975-06-01), Brecher
patent: 3929980 (1975-12-01), Abraham et al.
patent: 3995016 (1976-11-01), Kittle

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