US4119697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of titanium metal values
Assignee: Honeywell UOP LLC
•
Filing: 1977-07-11
•
Granted: 1978-10-10
•
Expires: 1997-07-11
Abstract
Abstract Titanium metal values may be recovered from a titanium bearing source by subjecting the titanium bearing source to a reductive roast followed by leaching the reduced source with a hydrogen chloride source. Thereafter the leached titanium bearing source is precipitated by contact with a metal oxide such as ferric oxide in which the metal is present in a highly oxidized state. The precipitated titanium dioxide is separated and recovered while the spent liquor is treated to form hydrogen chloride which may be recycled to the leaching zone with a simultaneous formation of the metal oxide for recycle to the precipitation zone.
Inventors
- 👤 William K. Tolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:18
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/1245; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
124 words
A process for the recovery of titanium values from a titanium bearing source which comprises subjecting said titanium bearing source to a reduction roast, thereafter leaching the reduced source with a hydrogen chloride source in a leaching zone, precipitating the leached titanium bearing source in a precipitation zone by contact at a temperature of from about 75° to about 105° C. with a metal oxide selected from the group consisting of ferric oxide, vanadium pentoxide, vanadium dioxide, chromic oxide, manganese dioxide, and cupric oxide, separating and recovering the resultant precipitated titanium dioxide, treating the spent liquor to form hydrogen chloride and recycling the latter to said leaching zone, and simultaneously forming the metal oxide and recycling thus formed metal oxide to said precipitation zone.
Claim 2
Dependent Claim
124 words
A process for the recovery of titanium values from a titanium bearing source which comprises subjecting said titanium bearing source to a reduction roast, thereafter leaching the reduced source with a hydrogen chloride source in a leaching zone, precipitating the leached titanium bearing source in a precipitation zone by contact at a temperature of from about 75° to about 105° C. with a metal oxide selected from the group consisting of ferric oxide, vanadium pentoxide, vanadium dioxide, chromic oxide, manganese dioxide, and cupric oxide, separating and recovering the resultant precipitated titanium dioxide, treating the spent liquor to form hydrogen chloride and recycling the latter to said leaching zone, and simultaneously forming the metal oxide and recycling thus formed metal oxide to said precipitation zone.
Claim 3
Dependent Claim
30 words
The process as set forth in claim 1 in which said reductive roast is effected at a temperature in the range of from about 650° C. to about 1000° C.
Claim 4
Dependent Claim
25 words
The process as set forth in claim 1 in which said leach is effected in the range of from about 85° to about 105° C.
Claim 5
Dependent Claim
16 words
The process as set forth in claim 1 in which said metal oxide is ferric oxide.
Claim 6
Dependent Claim
16 words
The process as set forth in claim 1 in which said metal oxide is vanadium pentoxide.
Claim 7
Dependent Claim
16 words
The process as set forth in claim 1 in which said metal oxide is manganese dioxide.
Claim 8
Dependent Claim
18 words
The process as set forth in claim 1 in which said hydrogen chloride source is aqueous hydrochloric acid.
Claim 9
Dependent Claim
34 words
The process as set forth in claim 1 in which a portion of said metal oxide is recycled to said precipitation zone and the remaining portion of said metal oxide is separated and recovered.
Claim 10
Dependent Claim
37 words
The process as set forth in claim 8 in which the portion of said metal oxide which is recycled to said precipitation zone is from about 50% to about 100% by weight of said titanium bearing source.
Claim 11
Dependent Claim
30 words
The process as set forth in claim 1 in which the metal portion of said metal oxide is present in said titanium bearing source and is coleached with said titanium.
Claim 12
Dependent Claim
23 words
The process as set forth in claim 1 in which said spent liquor is treated by heating said liquor in an oxidizing atmosphere.
Claim 13
Dependent Claim
17 words
The process as set forth in claim 11 in which said oxidizing atmosphere is provided by air.
Claim 14
Dependent Claim
17 words
The process as set forth in claim 11 in which said oxidizing atmosphere is provided by oxygen.
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |