US4092403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of by-product hydrogen chloride streams
Assignee: Union Carbide Corp
•
Filing: 1976-08-12
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Granted: 1978-05-30
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Expires: 1996-08-12
Abstract
Abstract A process is disclosed for the purification of a by-product hydrogen chloride stream containing fluoride impurities including carbonyl fluorides comprising contacting said stream with activated alumina maintained at a temperature of at least 55 DEG C. to adsorb said impurities.
Inventors
- 👤 Charles Edward Rectenwald
- 👤 Henry Bishop Hinckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:30
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; C; C01; C01B; C01B7/00; C01B7/01; B01D2253/00; B01D2253/10; B01D2253/104; B01D2257/00; B01D2257/20; B01D2257/206; B01D2257/2066; B01D2259/00; B01D2259/40; B01D2259/401; B01D2259/41; B01D53/0407; B01D53/0423; Y; Y02; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
49 words
A process for the purification of a by-product hydrogen chloride stream containing fluoride impurities including carbonyl fluoride, comprising contacting said stream with low-silica containing activated alumina maintained at a temperature of at least 55° C. to simultaneously adsorb said fluoride impurities, and recovering the purified hydrogen chloride so separated.
Claim 2
Dependent Claim
49 words
A process for the purification of a by-product hydrogen chloride stream containing fluoride impurities including carbonyl fluoride, comprising contacting said stream with low-silica containing activated alumina maintained at a temperature of at least 55° C. to simultaneously adsorb said fluoride impurities, and recovering the purified hydrogen chloride so separated.
Claim 3
Dependent Claim
21 words
A process in accordance with claim 1, wherein said alumina is maintained at a temperature between about 100° and 200° C.
Claim 4
Dependent Claim
21 words
A process in accordance with claim 1, wherein said alumina is maintained at a pressure between about 100 and 300 psig.
Claim 5
Dependent Claim
23 words
A process in accordance with claim 1, wherein a plurality of contacting beds of alumina are maintained in series under said temperature conditions.
Claim 6
Dependent Claim
63 words
A process for the purification of a by-product hydrogen chloride stream containing at least two fluoride impurities selected from the group consisting of carbonyl fluoride, carbonyl chloride fluoride and hydrogen fluoride comprising contacting said stream with low-silica containing activated alumina maintained at a temperature of at least 55° C. to simultaneously adsorb said fluoride impurities, and recovering the purified hydrogen chloride so separated.
Claim 7
Dependent Claim
63 words
A process for the purification of a by-product hydrogen chloride stream containing at least two fluoride impurities selected from the group consisting of carbonyl fluoride, carbonyl chloride fluoride and hydrogen fluoride comprising contacting said stream with low-silica containing activated alumina maintained at a temperature of at least 55° C. to simultaneously adsorb said fluoride impurities, and recovering the purified hydrogen chloride so separated.
Claim 8
Dependent Claim
21 words
A process in accordance with claim 5, wherein said alumina is maintained at a temperature between about 100° and 200° C.
Claim 9
Dependent Claim
21 words
A process in accordance with claim 5, wherein said alumina is maintained at a pressure between about 100 and 300 psig.
Claim 10
Dependent Claim
23 words
A process in accordance with claim 5, wherein a plurality of contacting beds of alumina are maintained in series under said temperature conditions.
References Cited (Backward Citations)
US3789580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |