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US 5,207,997 AGranted
Process for producing an inorganic barium-containing solids composition
AssigneeKali-Chemie Aktiengesellschaft
InventorJacopo Porta
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Abstract
The processing of leaching residues from barium sulfide leaching is described. Sodium sulfide as well as a solid which is useful as an additive for fired clay products, particularly bricks, are obtained as valuable reaction products.
Claims16
A process for producing an inorganic, barium-containing solids composition, said process comprising the steps of
- reacting at a temperature in the range from 15.degree. to 100.degree. C. in an aqueous medium
- a) leaching residues from barium sulfide leaching and
- b) carbon dioxide, a gas mixture containing carbon dioxide, alkali hydrogen carbonate or alkali carbonate
- to produce a reaction mixture containing the barium-containing solids composition and an aqueous hydrogen sulfide or alkali sulfide solution, and
- separating the barium-containing solids composition from said reaction mixture.
2 more elements
Dependencies are inferred from the claim text.