Sorption of acidic gases by solid residue from sugar refining
First Claim
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1. A method of removing an acidic component of a gaseous mixture containing said acidic component comprising the steps:
- a) adding oxides or hydroxides of calcium to a sugar juice produced by aqueous extraction of a plant material,b) recovering from said sugar juice a solid residue that contains at least a portion of the calcium added in step a,c) contacting said solid residue from step b with said gaseous mixture in order to purify said gaseous mixture by removing said acidic component therefrom by reaction of said acidic component with said solid residue at a temperature of from about 900°
C. up to about 1316°
C.,d) conducting the reaction of step c under such conditions that said solid residue increases in weight on a dry basis, ande) separating said solid residue from the purified gaseous mixture produced in step c.
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Abstract
Solid residues formed as byproducts during the refining of sugars (e.g., beet sugar or cane sugar) are employed to sorb acidic gases such as oxides of sulfur or nitrogen. Calcines of the solid residues can also be used. Sorption of acidic gases from gaseous mixtures containing acidic gases is thus accomplished.
70 Citations
13 Claims
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1. A method of removing an acidic component of a gaseous mixture containing said acidic component comprising the steps:
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a) adding oxides or hydroxides of calcium to a sugar juice produced by aqueous extraction of a plant material, b) recovering from said sugar juice a solid residue that contains at least a portion of the calcium added in step a, c) contacting said solid residue from step b with said gaseous mixture in order to purify said gaseous mixture by removing said acidic component therefrom by reaction of said acidic component with said solid residue at a temperature of from about 900°
C. up to about 1316°
C.,d) conducting the reaction of step c under such conditions that said solid residue increases in weight on a dry basis, and e) separating said solid residue from the purified gaseous mixture produced in step c. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for producing a product useful for sorbing or reacting with acidic gases comprising the steps:
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a) adding oxides or hydroxides of calcium to a sugar juice produced by aqueous extraction of a plant material, b) recovering from said sugar juice a solid residue that contains at least a portion of the calcium added in step a, and c) contacting the solid residue recovered in step b with a gaseous mixture containing an acidic gas at a temperature of from about 900°
C. up to about 1316°
C. so as to calcine said solid residue. - View Dependent Claims (9, 10)
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11. A method of removing an acidic component of a gaseous mixture containing said acidic component comprising the steps:
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a) adding oxides or hydroxides of calcium to a sugar juice produced by aqueous extraction of a plant material, b) recovering from said sugar juice a solid residue that contains at least a portion of the calcium added in step a, c) contacting said solid residue from step b with said gaseous mixture in order to purify said gaseous mixture by removing said acidic component therefrom by reaction of said acidic component with said solid residue, d) conducting the reaction of step c at a temperature within the approximate range of from about 900°
C to about 1316°
C.,e) separating said solid residue from the purified gaseous mixture produced in step c. - View Dependent Claims (12, 13)
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Specification