Patent US3713781A successfully refreshed from Google Patents.
US3713781A
Expired / Lapsed
US
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Cross-flow fluid bed reactor
Assignee: Individual
•
Filing: 1970-10-21
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Granted: 1973-01-30
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Expires: 1990-10-21
Abstract
Abstract Apparatus for beneficiating titaniferous ores to produce essentially pure titanium dioxide by alternatingly contacting the ore at a temperature of 700* to 1250*C with carbon monoxide for a short period of time and then chlorine for a short period of time and then repeating the alternate steps of contacting the ore with carbon monoxide and chlorine, said apparatus comprising a fluid bed reactor containing a bed support consisting of a perforated plate or fritted disc beneath which is a compartamentalized gas plenium chamber, each compartment of the chamber being served by a gas feed line whereby sequential and alternating zones of carbon monoxide and chlorine are encountered by the ore proceeding through the fluidized bed, an overhead outlet tube by which gases are exhausted from the reactor, and a side outlet port by which the solid product is removed.
Inventors
- 👤 W Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:20
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1218; C22B34/1222; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/36; C22B1/00; C22B1/02; C22B1/10; B01J2219/00; B01J2219/18; B01J2219/182; F; F25; F25J; F25J2210/00; F25J2210/60; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
24 words
a plurality of separate compartments communicating with the bed of titaniferous ore solids by means of the gas inlets in the support means; and
Claim 2
Dependent Claim
24 words
a plurality of separate compartments communicating with the bed of titaniferous ore solids by means of the gas inlets in the support means; and
Claim 3
Dependent Claim
4 words
a support means; and
Claim 4
Dependent Claim
4 words
a support means; and
Claim 5
Dependent Claim
8 words
a solids inlet at one horizontal extremity; and
Claim 6
Dependent Claim
8 words
a solids inlet at one horizontal extremity; and
Claim 7
Dependent Claim
26 words
A cross-current fluid-bed reactor for the beneficiation of titaniferous ores at a temperature of from 700* to 1250*C, comprising: a. a horizontally disposed reaction chamber having
Claim 8
Dependent Claim
26 words
A cross-current fluid-bed reactor for the beneficiation of titaniferous ores at a temperature of from 700* to 1250*C, comprising: a. a horizontally disposed reaction chamber having
Claim 9
Dependent Claim
29 words
a solids outlet means and a gas outlet at the other horizontal extremity; b. a bed support positioned within the chamber to receive the partiCulate titaniferous ore solids comprising:
Claim 10
Dependent Claim
29 words
a solids outlet means and a gas outlet at the other horizontal extremity; b. a bed support positioned within the chamber to receive the partiCulate titaniferous ore solids comprising:
Claim 11
Dependent Claim
35 words
a plurality of gas inlets in the support means; c. a source of a gaseous reducing agent; d. a source of a gaseous halogenating agent; e. a gas plenum chamber beneath the bed support comprising:
Claim 12
Dependent Claim
35 words
a plurality of gas inlets in the support means; c. a source of a gaseous reducing agent; d. a source of a gaseous halogenating agent; e. a gas plenum chamber beneath the bed support comprising:
Claim 13
Dependent Claim
20 words
The apparatus of claim 1 wherein the gas inlets in the bed support are 1/32 to 3/32 inch in diameter.
Claim 14
Dependent Claim
103 words
each compartment being served by a separate gas feed line; and f. conduit means connecting some of said separate gas feed lines to said source of gaseous reducing agent and connecting the balance of said separate gas feed lines to said source of gaseous halogenating agent, said connections being such as to provide adjacent plenum compartments with gas from separate sources; whereby sequential and alternating zones of reducing and halogenating gases can be passed through the bed in a direction across the current of flow of solids moving laterally along the bed, said solids being maintained in a fluidized state by said gases.
Claim 15
Dependent Claim
103 words
each compartment being served by a separate gas feed line; and f. conduit means connecting some of said separate gas feed lines to said source of gaseous reducing agent and connecting the balance of said separate gas feed lines to said source of gaseous halogenating agent, said connections being such as to provide adjacent plenum compartments with gas from separate sources; whereby sequential and alternating zones of reducing and halogenating gases can be passed through the bed in a direction across the current of flow of solids moving laterally along the bed, said solids being maintained in a fluidized state by said gases.
Claim 16
Dependent Claim
34 words
The apparatus of claim 1 having a width of 2 to 15 feet, a length of 5 to 30 feet and means for retaining solids to a depth of 2 inches to 2 feet.
Claim 17
Dependent Claim
23 words
The apparatus of claim 1 wherein the gas plenum chamber contains from 3 to 20 compartments each communicating with the bed of solids.
Claim 18
Dependent Claim
22 words
The apparatus of claim 1 wherein the solid outlet means is a weir whereby the depth of the ore bed is controlled.
Claim 19
Dependent Claim
23 words
The apparatus of claim 1 wherein the gas plenum chamber contains from 3 to 20 compartments each for reducing agent and halogenating agent.
Claim 20
Dependent Claim
23 words
The apparatus of claim 6 wherein the gas plenum chamber contains for 4 to 12 compartments each for reducing agent and halogenating agent.
Claim 21
Dependent Claim
20 words
The apparatus of claim 1 wherein the bed support is tilted to give a deeper bed at the solids outlet.
Claim 22
Dependent Claim
22 words
The apparatus of claim 8 wherein the gas plenum chamber contains 3 to 20 compartments each communicating with the bed of solids.
References Cited (Backward Citations)
US1528319A
Cited
US1542350A
Cited
US1789813A
Cited
US2184885A
Cited
US2184884A
Cited
US2371619A
Cited
US2501487A
Cited
US2586818A
Cited
US2557528A
Cited
US2641849A
Cited
US3042498A
Cited
US2782019A
Cited
US3120999A
Cited
US3300295A
Cited
US3433624A
Cited
US3539293A
Cited
US3582288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |