Processes for producing calcium oxide and sulfuric acid from calcium sulfate with magnesium intermediate
AssigneeInnovator Energy, LLC
InventorEthan Novek
Life of this patent
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Abstract
The present application pertains to processes for making calcium oxide and/or sulfuric acid from calcium sulfate. In some embodiments the processes comprise reacting a component comprising calcium sulfate with a second component comprising magnesium sulfite under conditions to form a solid comprising calcium sulfite and a solution comprising magnesium sulfate. Next, at least a portion of the solid comprising calcium sulfite is decomposed to form a second solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker, or any combination thereof.
Claims28
A process comprising:
- reacting a component comprising calcium sulfate with a second component comprising magnesium sulfite under conditions to form a solid comprising calcium sulfite and a solution comprising magnesium sulfate, and
- decomposing at least a portion of the solid comprising calcium sulfite to form a second solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker, or any combination thereof.
A process comprising:
- reacting a component comprising calcium sulfate with a second component comprising magnesium citrate under conditions to form a solid comprising calcium citrate and a solution comprising magnesium sulfate, and
- reacting at least a portion of the formed solid comprising calcium citrate with sulfur dioxide, or sulfurous acid, or an acidic salt, or a derivative, or any combination thereof under conditions to form a composition comprising calcium and sulfur dioxide, or calcium sulfite, or calcium bisulfite, or any combination thereof;
- and
- decomposing at least a portion of the formed composition to form a solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker.
A process comprising:
- reacting magnesium oxide, or magnesium hydroxide, or calcium sulfate, or any combination thereof with citric acid, or a citrate, or any combination thereof under conditions to form a composition comprising magnesium sulfate and calcium citrate;
- and
- reacting at least a portion of the calcium citrate with at least a portion of sulfur dioxide, or sulfurous acid, or an acidic salt, or a derivative, or any combination thereof under conditions to form a composition comprising calcium and sulfur dioxide, or calcium sulfite, or calcium bisulfite, or any combination thereof;
- and
- decomposing at least a portion of the formed composition calcium and sulfur dioxide, or calcium sulfite, or calcium bisulfite, or any combination thereof to form a solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker.
A process comprising:
- reacting magnesium oxide, or magnesium hydroxide, or magnesium carboxylate, or magnesium citrate, or citric acid, or a carboxylic acid, or calcium sulfate, or any combination thereof with sulfur dioxide, or sulfurous acid, or sulfite, or bisulfite, or any combination thereof under conditions to form a composition comprising magnesium sulfate, or magnesium carboxylate, or any combination thereof and calcium sulfite, or calcium carboxylate, or any combination thereof;
- decomposing at least a portion of the formed composition to form a solid comprising calcium oxide, or calcium hydroxide, or cement, or clinker.
Dependencies are inferred from the claim text.