Process for the preparation of an alkaline-zinc slurry for use i

Details Process for the preparation of an alkaline-zinc slurry for use i Process for the preparation of an alkaline-zinc slurry for use i

1993-07-06

1995-01-03

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204116, 204130, 429 17, 429 19, 429 21, 429 49, C25C 116

Patent

active

053783298

ABSTRACT:
A process for the preparation of an alkaline-zinc slurry for use in batteries, the slurry comprising an admixture of (a) at least partly oxidized zinc; (b) an aqueous solution of at least one Group Ia metal; and (c) an inorganic or organic inhibitor. The process includes the steps of electrolyzing the admixture in a cell with a corrosion-resistant anode and a non-zinc-adherent cathode such that the zinc deposits on the cathode self-detach or are removed until no more than a preselected amount of zinc remains in the solution, provided that the current density at the cathode is preselected so that the electrowon zinc will have, after homogenizing into particles, a density within the range 0.2-2.0 g/cc and a surface area within the range 0.5-6.0 m.sup.2 /g; removing zinc from the cathode and homogenizing it into particles; and combining the homogenized zinc particles with additional aqueous Group Ia metal hydroxide and optionally with other makeup components selected from the group consisting of water and inhibitor to form a charged slurry.

REFERENCES:
patent: 5228958 (1993-07-01), Goldstein et al.
patent: 5232798 (1993-08-01), Goldstein et al.

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