US4053558A
Expired / Lapsed
US
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Purification of gas streams containing ferric chloride
Assignee: Stauffer Chemical Co
•
Filing: 1976-12-06
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Granted: 1977-10-11
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Expires: 1996-12-06
Abstract
Abstract Ferric chloride is removed from gas streams containing the same by passing the stream through a bed of activated alumina impregnated with potassium chloride or sodium chloride.
Inventors
- 👤 Ramsey G. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8659; B01D53/46; B01D53/68; C; C01; C01B; C01B7/00; C01B7/01; C01B7/07; C01B7/0706; C01B7/0718
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
A process for removing ferric chloride from a gaseous stream containing the same by passing said stream through a bed comprising activated alumina impregnated with a member selected from the group consisting of potassium chloride and sodium chloride.
Claim 2
Dependent Claim
38 words
A process for removing ferric chloride from a gaseous stream containing the same by passing said stream through a bed comprising activated alumina impregnated with a member selected from the group consisting of potassium chloride and sodium chloride.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the gaseous stream comprises hydrogen chloride.
Claim 4
Dependent Claim
14 words
A process according to claim 1 wherein the alkali metal halide is potassium chloride.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the alkali metal halide is sodium chloride.
Claim 6
Dependent Claim
16 words
A process according to claim 1 wherein the activated alumina is in the form of spheres.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |