Process for the production of hydrogen from water

Details Process for the production of hydrogen from water Process for the production of hydrogen from water

1977-02-25

1978-05-16

Stern, Edward

Chemistry of inorganic compounds

Hydrogen or compound thereof

Elemental hydrogen

423481, 423500, 423522, C01B 102, C01B 718, C01B 1774

Patent

active

040899390

ABSTRACT:
Hydrogen is produced from water by reacting I.sub.2 SO.sub.2 and H.sub.2 O to make hydrogen iodide and sulfuric acid. SO.sub.2 is present in a substantial molar excess with respect to the available H.sub.2 O and I.sub.2 is also present in excess to cause the formation of a lighter sulfuric acid-bearing phase and a heavier hydrogen iodide-bearing phase. The heavier phase is separated from the lighter phase, degassed to remove SO.sub.2 and then treated with additional HI and I.sub.2 to cause the formation of a light immiscible fraction containing sulfuric acid and water which is removed to substantially reduce the sulfur content of the degassed phase. Finally, the hydrogen iodide product is separated and decomposed to produce hydrogen.

REFERENCES:
patent: 2143222 (1939-01-01), Heath
patent: 2406930 (1946-09-01), Titlestad
patent: 3365276 (1968-01-01), Childs et al.
patent: 3888750 (1975-06-01), Brecher et al.
patent: 3929980 (1975-12-01), Abraham et al.
Mellor's Comp. Treatise on Inorg. and Theo. Chem., Supp. II, Part I, 1956 Ed., p. 865. Longmans, Green & Co., N.Y.
Jacobson's "Encyclopedia of Chem. Reactions," vol. 3, 1949 Ed., p. 709. Reinhold Pub. Corp., N.Y.
McPherson & Henderson book "A Course in General Chem.," Third Ed., 1927, p. 372. Ginn & Co., N.Y.

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