Process for producing electrolyte for redox cell
AssigneesJapan Metals and Chemical Co., Ltd., Agency of Industrial Science and Technology
InventorsHiroko Kaneko, Ken Nozaki, Takeo Ozawa, Koichi Oku, Takashi Shimanuki, Yoshinori Koga
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Abstract
A process for producing an anolyte and a catholyte for redox cells which comprises the steps of heating chromium ore together with carbonaceous substances to produce a pre-reduced chromium product produced a part of iron and chromium in chromium ore, dissolving the pre-reduced chromium product in hydrochloric acid and/or sulfuric acid iron and chromium. Thus, the dissolving step can be simplified, the predetermined concentration can be simply regulated.
Claims8
A process for producing an anolyte and a catholyte for redox cells which comprises the steps of:
- mixing chromium ore and carbonaceous substances to form a product;
- heating the product at 1200.degree. to 1400.degree. C. to produce a pre-reduced chromium product in which iron and chromium in chromium ore are partially reduced;
- dissolving said pre-reduced chromium product in hydrochloric acid to extract iron and chromium.
A process for producing an anolyte and a catholyte for redox cells which comprises the steps of:
- mixing chromium ore and carbonaceous substances to form a product;
- heating the product at 1200.degree. to 1400.degree. C. to produce a pre-reduced chromium product in which iron and chromium in chromium ore are partially reduced;
- dissolving said pre-reduced chromium product in a sulfuric acid to extract iron and chromium;
- further adding hydrochloric acid thereto.
A process for producing an anolyte and a catholyte for redox cells which comprises the steps of
- mixing chromium ore and carbonaceous substances to form a product,
- heating the product at 1200.degree. to 1400.degree. C. to produce a pre-reduced chromium product in which iron and chromium in chromium ore are partially reduced;
- dissolving said pre-reduced chromium product in a sulfuric acid to extract iron and chromium;
- dissolving said pre-reduced chromium product in hydrochloric acid to extract iron and chromium;
- and
- then mixing both solutions.
A process for producing an anolyte and a catholyte for redox cells which comprises the steps of
- mixing chromium ore and carbonaceous substances to form a product;
- heating the product at 1200.degree. to 1400.degree. C. to produce a prereduced chromium product in which iron and chromium in chromium ore are partially reduced;
- dissolving said pre-reduced chromium product in mixed acid of sulfuric acid and hydrochloric acid to extract iron and chromium.
Dependencies are inferred from the claim text.