Chemistry of inorganic compounds – Hydrogen or compound thereof – Elemental hydrogen
Patent
1978-08-17
1979-10-02
Vertiz, O. R.
Chemistry of inorganic compounds
Hydrogen or compound thereof
Elemental hydrogen
75109, 75117, 423489, 423593, C01B 102
Patent
active
041698843
ABSTRACT:
A process for producing hydrogen comprises the step of reacting metallic Cu with Ba(OH).sub.2 in the presence of steam to produce hydrogen and BaCu.sub.2 O.sub.2. The BaCu.sub.2 O.sub.2 is reacted with H.sub.2 O to form Cu.sub.2 O and a Ba(OH).sub.2 product for recycle to the initial reaction step. Cu can be obtained from the Cu.sub.2 O product by several methods. In one embodiment the Cu.sub.2 O is reacted with HF solution to provide CuF.sub.2 and Cu. The CuF.sub.2 is reacted with H.sub.2 O to provide CuO and HF. CuO is decomposed to Cu.sub.2 O and O.sub.2. The HF, Cu and Cu.sub.2 O are recycled. In another embodiment the Cu.sub.2 O is reacted with aqueous H.sub.2 SO.sub.4 solution to provide CuSO.sub.4 solution and Cu. The CuSO.sub.4 is decomposed to CuO and SO.sub.3. The CuO is decomposed to form Cu.sub.2 O and O.sub.2. The SO.sub.3 is dissolved to form H.sub.2 SO.sub.4. H.sub.2 SO.sub.4, Cu and Cu.sub.2 O are recycled. In another embodiment Cu.sub.2 O is decomposed electrolytically to Cu and O.sub.2. In another aspect of the invention, Cu is recovered from CuO by the steps of decomposing CuO to Cu.sub.2 O and O.sub.2, reacting the Cu.sub.2 O with aqueous HF solution to produce Cu and CuF.sub.2, reacting the CuF.sub.2 with H.sub.2 O to form CuO and HF, and recycling the CuO and HF to previous reaction steps.
REFERENCES:
patent: 1375932 (1921-04-01), Rideal et al.
patent: 3880987 (1975-04-01), Nahas
patent: 4005184 (1977-01-01), Bamberger et al.
Bamberger Carlos E.
Richardson, deceased Donald M.
Carlson Dean E.
Hamel Stephen D.
Langel Wayne A.
The United States of America as represented by the United States
Uzzell Allen H.
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