Patent US4058587A successfully refreshed from Google Patents.
US4058587A
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Process for removing impurities from acidic fluid solutions
Assignee: Individual
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Filing: 1975-12-18
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Granted: 1977-11-15
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Expires: 1995-12-18
Abstract
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 2 CO 3 and H 2 SO 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.
Inventors
- 👤 Ernest William Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/62; B01D53/48; B01D53/50; B01D53/501; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
106 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 2
Dependent Claim
106 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein the acidic fluid solution is an aqueous liquid.
Claim 4
Dependent Claim
15 words
A process according to claim 2, wherein the aqueous liquid is a waste industrial liquid.
Claim 5
Dependent Claim
25 words
A process according to claim 2, wherein the aqueous liquid is formed by contacting a gas containing the at least one acidic component with water.
Claim 6
Dependent Claim
14 words
A process according to claim 4, wherein the gas is a waste industrial gas.
Claim 7
Dependent Claim
14 words
A process according to claim 1, wherein the acidic fluid solution is a gas.
Claim 8
Dependent Claim
14 words
A process according to claim 6, wherein the gas is a waste industrial gas.
Claim 9
Dependent Claim
20 words
A process according to claim 1, wherein there is further included the step of recovering metallic values from the solid.
Claim 10
Dependent Claim
115 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 11
Dependent Claim
115 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 12
Dependent Claim
26 words
A process according to claim 9, wherein the serpentine material has a hardness of 2 to 5 and an index of refraction of 1.49 to 1.57.
Claim 13
Dependent Claim
26 words
A process according to claim 9, wherein the acidic gaseous components, when mixed with water, form H 2 CO 3 and H 2 SO 3 .
Claim 14
Dependent Claim
89 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 15
Dependent Claim
89 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 16
Dependent Claim
13 words
A process according to claim 12, wherein the magnesium salts include magnesium sulfite.
Claim 17
Dependent Claim
13 words
A process according to claim 12, wherein the magnesium salts include magnesium carbonate.
Claim 18
Dependent Claim
87 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 19
Dependent Claim
87 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 20
Dependent Claim
88 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 21
Dependent Claim
88 words
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 6 (Si 4 O 10 ) (OH) 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.
Claim 22
Dependent Claim
70 words
A process for filtering a slightly acidic aqueous solution having an acidic component selected from a group consisting of H 2 CO 3 and H 2 SO 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 6 (Si 4 O 10 ) (OH) 8 and passing said solution through said layer.
Claim 23
Dependent Claim
70 words
A process for filtering a slightly acidic aqueous solution having an acidic component selected from a group consisting of H 2 CO 3 and H 2 SO 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 6 (Si 4 O 10 ) (OH) 8 and passing said solution through said layer.
References Cited (Backward Citations)
US3882221A
Cited
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| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
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