Process for removing impurities from acidic fluid solutions
OwnerErnest William Nelsoninventor
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Abstract
A process is disclosed for removing impurities such as carbon dioxide, and sulfur dioxide from acidic fluid solutions using a serpentine material and producing a reaction product comprising recoverable metal values and finely divided silica. In accordance with the process, the serpentine material is slurried with water and is then mixed with an acidic fluid solution including at least one of H.sub.2 CO.sub.3 and H.sub.2 SO.sub.3. In particular, the acid material may be formed by contacting a gaseous component such as carbon dioxide or sulfur dioxide directly with water. A waste industrial gas containing carbon dioxide, sulfur dioxide, or a mixture of the two is an excellent source of gaseous components having utility in connection with this invention.
Claims17
A process for removing impurities from an acidic fluid solution, the acidic solution containing as impurities at least one acidic component selected from a group consisting of carbon dioxide and sulfur dioxide, which comprises
- forming an admixture of a serpentine material having the formula Mg.sub.6 (Si.sub.4 O.sub.10) (OH).sub.8 and water, the serpentine material being a heterogeneous mixture comprising primarily a magnesium hydroxide and silica, and
- mixing the acidic fluid solution with the admixture to produce a solid consisting predominately of at least one salt selected from a group consisting of magnesium sulfite and magnesium carbonate and silica and substantially pure water.
A process for removing impurities from waste industrial gases, the waste industrial gases containing as impurities at least one acidic gaseous component selected from a group consisting of carbon dioxide and sulfur dioxide, which comprises
- forming an admixture of a serpentine material having the formula Mg.sub.6 (Si.sub.4 O.sub.10) (OH).sub.8 and water, the serpentine material being a heterogeneous mixture comprising primarily a magnesium hydroxide and silica, and
- passing the waste industrial gases through the admixture to produce a waste gas substantially free of the impurities, a solid consisting predominately of at least one salt selected from a group consisting of magnesium sulfite and magnesium carbonate and silica and substantially pure water.
A process for removing impurities from waste industrial gases, the waste industrial gases containing as impurities carbon dioxide and sulfur dioxide, which comprises
- forming an admixture of a serpentine material having the formula Mg.sub.6 (Si.sub.4 O.sub.10) (OH).sub.8 and water, the serpentine material being a heterogeneous mixture consisting essentially of magnesium hydroxide and silica, and
- passing the waste industrial gases through the admixture to produce a waste gas substantially free of the impurities, a solid predominately containing magnesium salts and silica and substantially pure water.
A process for removing impurities from waste industrial gases, said waste industrial gases containing as an impurity carbon dioxide, which comprises
- forming an admixture of a serpentine material having the formula Mg.sub.6 (Si.sub.4 O.sub.10) (OH).sub.8 and water, the serpentine material being a heterogeneous mixture consisting essentially of magnesium hydroxide and silica, and
- passing the waste industrial gases through the admixture to produce a waste gas substantially free of impurities, a solid consisting predominately of magnesium carbonate and silica and substantially pure water.
A process for removing impurities from waste industrial gases, the waste industrial gases containing as an impurity sulfur dioxide, which comprises
- forming an admixture of a serpentine material having the formula Mg.sub.6 (Si.sub.4 O.sub.10) (OH).sub.8 and water, the serpentine material being a heterogeneous mixture consisting essentially of magnesium hydroxide and silica, and
- passing the waste industrial gases through the admixture to produce a waste gas substantially free of the impurities, a solid consisting predominately of magnesium sulfite and silica and substantially pure water.
A process for filtering a slightly acidic aqueous solution having an acidic component selected from a group consisting of H.sub.2 CO.sub.3 and H.sub.2 SO.sub.3 and neutralizing the same to a pH of substantially 7 comprising
- forming a filter bed comprising a layer of a particulate serpentine material having the formula Mg.sub.6 (Si.sub.4 O.sub.10) (OH).sub.8 and
- passing said solution through said layer.
Dependencies are inferred from the claim text.