US4066424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selectively recovering metal chlorides from gaseous effluent
Assignee: EIDP Inc
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Filing: 1976-10-13
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Granted: 1978-01-03
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Expires: 1996-10-13
Abstract
Abstract Process for selectively recovering metal chlorides from a gaseous mixture of metal chlorides by contacting the gaseous mixture at a temperature above the condensation point of the mixture with at least one stream of liquid to cool all the mixture to below the freezing point of at least one metal chloride in the mixture, the average velocity of the mixture being at least the pneumatic conveyance velocity at the point of contact. This process provides for recovery of metal chlorides without plugging the apparatus.
Inventors
- 👤 Arnold William Kilgren
- 👤 David Nicholson Low
- 👤 Robert Warwick Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:36
CPC Classifications
C; C01; C01G; C01G1/00; C01G1/06; B; B01; B01D; B01D7/00; B01D7/02; C01G49/00; C01G49/10; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1218; C22B34/1231; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
In a process for recovering metal chlorides from a gaseous mixture consisting essentially of at least two gaseous metal chlorides, the improvement comprising contacting the gaseous mixture flowing through a transfer duct at a temperature above the condensation point of the gaseous mixture with at least one stream of liquid to rapidly cool substantially all of the gaseous mixture to a temperature below the freezing point of at least one of the metal chlorides in the gaseous mixture, the velocity of the gaseous mixture being at least the pneumatic conveyance velocity at the contact zone and the rate of cooling substantially all of the gaseous mixture being less than one second.
Claim 2
Dependent Claim
111 words
In a process for recovering metal chlorides from a gaseous mixture consisting essentially of at least two gaseous metal chlorides, the improvement comprising contacting the gaseous mixture flowing through a transfer duct at a temperature above the condensation point of the gaseous mixture with at least one stream of liquid to rapidly cool substantially all of the gaseous mixture to a temperature below the freezing point of at least one of the metal chlorides in the gaseous mixture, the velocity of the gaseous mixture being at least the pneumatic conveyance velocity at the contact zone and the rate of cooling substantially all of the gaseous mixture being less than one second.
Claim 3
Dependent Claim
43 words
Process for recovering metal chlorides from a gaseous mixture according to claim 1 wherein the gaseous metal chlorides are selected from the group consisting of the chlorides of titanium, iron, copper, lead, zinc, calcium, chromium, cobalt, nickel, tin, aluminum, vanadium, manganese, and magnesium.
Claim 4
Dependent Claim
40 words
Process for recovering metal chlorides from a gaseous mixture according to claim 2 wherein the velocity of the stream of liquid is sufficient to provide at least 1.0 jet horsepower per square foot of cross-sectional area of the contact zone.
Claim 5
Dependent Claim
30 words
Process for recovering metal chlorides from a gaseous mixture according to claim 3 wherein the stream of liquid is directed countercurrently to the direction of flow of the gaseous mixture.
Claim 6
Dependent Claim
29 words
Process for recovering metal chlorides from a gaseous mixture according to claim 4 wherein the velocity of the gaseous mixture is at least the flooding velocity at contact zone.
Claim 7
Dependent Claim
47 words
Process for recovering metal chlorides from a gaseous mixture according to claim 5 wherein the gaseous mixture consists essentially of titanium tetrachloride, ferric chloride, and ferrous chloride and the stream of liquid is selected from at least one of titanium tetrachloride, carbon tetrachloride, methylene chloride, and chlorine.
Claim 8
Dependent Claim
51 words
Process for recovering metal chlorides from a gaseous mixture according to claim 6 wherein the temperature of the gaseous mixture prior to contacting the stream of liquid is above the condensation point of ferrous chloride and wherein the gaseous mixture is cooled to a temperature of from 175° to 600° C.
References Cited (Backward Citations)
CA598741A
Cited
US2446181A
Cited
US2580635A
Cited
US2999733A
Cited
US3222847A
Cited
US3878291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |