Patent US4120668A successfully refreshed from Google Patents.
US4120668A
Expired / Lapsed
US
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Method for removing entrained melt from a gaseous stream
Assignee: MW Kellogg Co
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Filing: 1977-05-16
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Granted: 1978-10-17
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Expires: 1997-05-16
Abstract
Abstract A process for removing entrained liquid and volatilized melt from a gaseous stream produced in molten salt processing wherein the gaseous stream is passed through fluidized, solid particulate material and entrained melt solidifies on the particulate material.
Inventors
- 👤 Lowell David Fraley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:56
CPC Classifications
B; B01; B01D; B01D49/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A process for removal of entrained melt from a gaseous stream comprising: (a) maintaining solid, particulate material in a separation zone at a temperature below the temperature of the gaseous stream; (b) passing the gaseous stream containing entrained melt upwardly through the solid, particulate material at a sufficient velocity to fluidize the material; (c) solidifying the entrained melt on the fluidized, solid, particulate material in the separation zone by maintaining the solid particulate material at a temperature below the condensation temperature of the entrained melt to form coated particulate material; (d) removing at least a portion of the coated particulate material from the separation zone; (e) adding clean solid, particulate material to the separation zone; and (f) withdrawing a cleaned gaseous stream from the separation zone.
Claim 2
Dependent Claim
126 words
A process for removal of entrained melt from a gaseous stream comprising: (a) maintaining solid, particulate material in a separation zone at a temperature below the temperature of the gaseous stream; (b) passing the gaseous stream containing entrained melt upwardly through the solid, particulate material at a sufficient velocity to fluidize the material; (c) solidifying the entrained melt on the fluidized, solid, particulate material in the separation zone by maintaining the solid particulate material at a temperature below the condensation temperature of the entrained melt to form coated particulate material; (d) removing at least a portion of the coated particulate material from the separation zone; (e) adding clean solid, particulate material to the separation zone; and (f) withdrawing a cleaned gaseous stream from the separation zone.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the melt comprises an alkali metal carbonate.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the melt comprises a eutectic mixture containing sodium carbonate, lithium carbonate, and potassium carbonate.
Claim 5
Dependent Claim
27 words
The process of claim 2 wherein the solid, particulate material is selected from the group consisting of sand, alumina, zeolite, glasses, limestone, dolomite, ash, or mixtures thereof.
Claim 6
Dependent Claim
55 words
The process of claim 1 wherein the fluidized, solid, particulate material is positioned in a dense phase, stationary bed and has a size range of from about 20 microns to about 500 microns and the fluidizing gaseous stream has a superficial velocity of from about 0.1 feet per second to about 8.0 feet per second.
Claim 7
Dependent Claim
56 words
The process of claim 1 wherein the fluidized, solid, particulate material is maintained in a dilute phase, circulating, fluidized system and has a size range of from about 20 microns to about 500 microns and the fluidizing gaseous stream has a superficial velocity of from about 5 feet per second to about 70 feet per second.
Claim 8
Dependent Claim
52 words
The process of claim 1 wherein the gaseous stream is at a temperature of from about 750° F. to about 2000° F. and the separation zone is maintained at a temperature of from about 300° F. to about 1700° F. and a pressure of from about 10 psig. to about 2000 psig.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein waste heat is recovered from the separation zone by indirect heat exchange with the fluidized, solid, particulate material.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the gaseous stream contains hydrogen, methane, carbon monoxide, or mixtures thereof.
Claim 11
Dependent Claim
14 words
The process of claim 1 wherein the gaseous stream contains petroleum distillates and olefins.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |